Maintenance Manual
KING AIR® 90
SERIES
90 (LJ-1 THRU LJ-75, LJ-77 THRU LJ-113)
A90 (LJ-76, LJ-114 THRU LJ-317)
B90 (LJ-318 THRU LJ-501)
C90 (LJ-502 THRU LJ-985, LJ-987 THRU LJ-995, LJ-997 THRU LJ-1010)
C90-1 (LJ-986, LJ-996, LJ-1011 THRU LJ-1084, LJ-1086 THRU LJ-1087)
C90A (LJ-1085, LJ-1088 THRU LJ-1287, LJ-1289 THRU LJ-1294, LJ-1296
THRU LJ-1299)
C90B (LJ-1288, LJ-1295, LJ-1300 THRU LJ-1726, LJ-1728 THRU LJ-1753,
LJ-1755)
C90GT (LJ-1727, LJ-1754, LJ-1756 THRU LJ-1846, LJ-1848 THRU LJ-1852)
C90GTi (LJ-1847, LJ-1853 THRU LJ-2128)
E90 (LW-1 AND ON)
COPYRIGHT © 2019
TEXTRON AVIATION INC.
WICHITA, KANSAS, USA
90-590012-13D1
23 FEBRUARY 1964
REVISION D1
1 AUGUST 2023
King Air 90 Series Maintenance Manual (Rev D1)
05-00-00 (Rev D0)
1.
TIME LIMITS/MAINTENANCE CHECKS
Description
WARNING: When an airplane has experienced abnormal landing gear procedures of any type, as a safety precaution,
place the airplane on jacks prior to performing any inspection or maintenance. Make sure that all three
landing gears are down and locked prior to removing the airplane from the jacks.
CAUTION: Jacking of an airplane for the purpose of landing gear operation, inspection, servicing or maintenance
should be accomplished within an enclosed building or hangar. In the interest of safety, should it become
necessary to jack the airplane in the open, wind velocity in any direction and terrain variations must be
compensated for prior to jacking the airplane.
This chapter contains an overhaul and replacement schedule, all scheduled inspection forms, and a chart for unscheduled
maintenance checks.
NOTE:
A.
B.
C.
D.
E.
A flight cycle is defined as: Engine start-up and increase to full or partial power (as required during a normal
flight), one landing gear retraction and extension, and a complete shutdown.
The inspection program in this chapter, and within the computerized maintenance-tracking system, is based on number of flight
hours, cycles of operation and/or calendar time. The basis for calendar-time-limited inspections is the date on the "ORIGINAL
STANDARD AIRWORTHINESS CERTIFICATE", which is issued with a new airplane. Additionally, Textron Aviation Inc.
recommends that operators record the number of cycles experienced on individual components for purposes of complying with
inspections based on cycle count. Recorded hour-meter time or an airplane log sheets can be used for determining when
inspections and maintenance based on flight hours will be due. The method chosen for recording flight hours should remain
consistent throughout the life of the airplane.
The times in this inspection program have been established only as a guideline to give the owner/operator a benchmark from
which to begin the program. The service history or fleet experience of a particular operation may indicate that departure from
the times in this chapter could be beneficial.
All inspections listed in this chapter, and within the computerized maintenance-tracking system, should be accomplished with
reference to the King Air 90 Series Maintenance Manual and the appropriate supplier maintenance publications. Maintenance
information on most of the major components of the airplane is contained in the King Air Series Component Maintenance
Manual.
Additional Requirements Introduced by Revision Action
(1) Unless otherwise directed by relevant notification or Service Bulletin, additional requirements introduced into the
Inspection Schedule must be met within 12 calendar months.
Special Conditions Cautionary Notice
(1) Airplanes operated for Air Taxi, or other than normal operation, and airplanes operated in humid tropics, cold and damp
climates, etc., may need more frequent inspections for wear, corrosion and/or lack of lubrication. Under these adverse
conditions, perform periodic inspections in compliance with this guide at more frequent intervals until the owner/operator
can set his own inspection periods based on the contingencies of field experience.
CAUTION: The recommended periods do not constitute a guarantee the item will reach the period without
malfunction as the aforementioned factors cannot be controlled by the manufacturer.
F.
Inspection Programs
The Textron Aviation Inc. approved inspection program contained in this chapter is specifically for the King Air 90 series
airplane. Any variation to the inspection must be approved in writing by the FAA Flight Standards District Office (FSDO), or
Airworthiness Authority. The Maintenance Inspection Program meets the requirement of both 14 CFR 91 and CFR 135.
(1) 200-Hour Phase Inspection Program
(a) A complete inspection cycle is 800 hours or 24 calendar months. The inspection cycle is divided into four phases and
each inspection cycle is done at 200 hours with each consecutive phase 200 hours after the previous phase. The
Phase 1, 2, 3 and 4 inspections provide a thorough inspection of specific components and systems and occur at
200-hour intervals.
(b) A complete inspection cycle is as follows:
Table 1. 200-Hour Phase Inspection Program
PHASE
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
HOURS
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King Air 90 Series Maintenance Manual (Rev D1)
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NOTE:
NOTE:
1
200
2
3
400
600
4
800
All four phase inspections must be completed each 24 calendar months or 800 flight hours.
Textron Aviation Inc. recommends that no airplane exceed 12 months or 200 ±20 flight hours
without completion of at least one phase inspection. A complete scheduled inspection (or all
phase 1, 2, 3 and 4 inspections) must be accomplished within a 24-calendar-month period. Any
part of the inspection which has not been accomplished will become due immediately.
Completion of the phase 1, 2, 3 and 4 inspections shall be considered as a complete
inspection. Should an airplane exceed the limitations of the Textron Aviation Inc. inspection
program, the airplane must accomplish all phase 1, 2, 3 and 4 inspections, or a complete
inspection, to reestablish the airplane's inspection cycle.
(c) Although the times of the inspections may be altered, each item should be accomplished as stated in the inspection
program. A detailed preamble to this subchapter is included and should be read and understood before beginning
the Inspection Program.
(2) Alternate Phase Inspection Program
(a) For users flying less than 400 hours but more than 200 hours in 24 months, perform the Alternate Phase Inspection in
Chapter 05-21-00 or 05-25-00.
(b) Alternate Phase Inspection: If an airplane is not flown at least 400 hours in 24 months, the owner/operator has the
option of inspecting the airplane as follows:
•
Perform scheduled phase inspections 1 and 2 together within 12 months after the last inspection; then perform
scheduled phase inspections 3 and 4 together within 12 months after completing the phase 1 and 2
inspections.
NOTE:
Textron Aviation Inc. recommends that no airplane exceed 12 months or 200 ±20 flight hours
without completing at least one phase inspection. A complete scheduled inspection (or all phase 1,
2, 3 and 4 inspections) must be accomplished within a 24-calendar-month period. Any part of the
inspection which has not been accomplished will become due immediately. Completion of the
phase 1, 2, 3 and 4 inspections shall be considered as a complete inspection. Should an airplane
exceed the limitations of the Textron Aviation Inc. inspection program, the airplane must
accomplish all phase 1, 2, 3 and 4 inspections, or a complete inspection, to reestablish the
airplane's inspection cycle.
Table 2. Alternate Phase Inspection Program
PHASE
HOURS
1&2
3&4
200
400
(3) Biennial Inspection Program
(a) For users flying less than 200 hours in 24 months, perform the Biennial Inspection Program in Chapter 05-22-00 or
05-26-00.
(b) Biennial Inspection: The inspection program is for users flying less than 200 hours in 24 months and it is made up of
an INTERIM INSPECTION and a COMPLETE INSPECTION.
•
Perform an INTERIM INSPECTION at 12 months and every 24 months thereafter.
•
Perform a COMPLETE INSPECTION at 24 months and every 24 months thereafter.
NOTE:
Textron Aviation Inc. recommends that no airplane exceed 12 months or 200 ±20 flight hours
without completing at least one phase inspection or interim as appropriate to the program used. A
complete scheduled inspection (or all phase 1, 2, 3 and 4 inspections) must be accomplished
within a 24-calendar-month period. Any part of the inspection which has not been accomplished
will become due immediately. Completion of the phase 1, 2, 3 and 4 inspections shall be
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 2 of 3
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King Air 90 Series Maintenance Manual (Rev D1)
05-00-00 (Rev D0)
considered as a complete inspection. Should an airplane exceed the limitations of the Textron
Aviation Inc. inspection program, the airplane must accomplish all phase 1, 2, 3 and 4 inspections,
or a complete inspection, to reestablish the airplane's inspection cycle.
G.
Special Inspection Recommendations
NOTE:
H.
I.
The recommendations of this portion of the Scheduled Inspection may be accomplished by either: 1)
Inspection in accordance with the appropriate information in the applicable maintenance manual, or 2)
Exchange parts from Textron Aviation Inc. may be purchased and installed. Compliance with one of
these two options is at the discretion of the maintenance facility performing the inspection.
(1) This section consists of components that are subject to a thorough inspection based on calendar time, operating hours or
cycles which do not coincide with the intervals established by the scheduled inspection program. These inspections should
be done with reference to this maintenance manual and the King Air Series Component Maintenance Manual. When
disassembly is required to accomplish these inspections, it should be performed in accordance with the applicable
component manuals. Discrepancies noted during these inspections should be noted on work sheets for corrections. The
first inspection must be performed no later than the recommended period. The condition of the item at the end of the first
period can be used as a criterion for determining subsequent periods applicable to the individual airplane or fleet
operation, provided the operator has an approved-condition monitoring system. The time periods for inspections noted in
this manual are based on average usage and average environmental conditions.
Overhaul and Replacement Schedule
(1) The first overhaul and replacement must be performed no later than the recommended period. The time periods for
overhaul and replacement noted in this manual are based on average usage and average environmental conditions.
(2) Items NOT listed are to be overhauled or replaced "On Condition." If "On Condition" items are worn, inoperative,
inaccurate, intermittent and are not repairable through normal maintenance practices, they must be replaced.
Unscheduled Maintenance Checks
(1) Additional inspections may be required by engine or propeller manufactures in their manuals. Refer to the unscheduled
maintenance checks portion of the supplier issued manuals to check continued airworthiness.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 3 of 3
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King Air 90 Series Maintenance Manual (Rev D1)
05-11-00 (Rev D0)
1.
OVERHAUL AND REPLACEMENT SCHEDULE - INSPECTION/CHECK
Overhaul and Replacement Schedule
A.
B.
The first overhaul and replacement must be performed not later than the recommended period. The condition of the item at the
end of the first period can be used as a criterion for determining subsequent periods applicable to the individual airplane or
fleet operation, provided the operator has an approved condition monitoring system.
The time periods for overhaul and replacement noted in this manual are based on average usage and average environmental
conditions.
NOTE:
2.
The recommended periods do not constitute a guarantee the item will reach the period without
malfunction as the aforementioned factors cannot be controlled by the manufacturer.
Special Conditions Cautionary Notice
A.
Airplanes operated for Air Taxi or other than normal operation and airplanes operated in humid tropics, cold and damp
climates, etc., may need more frequent inspections for wear, corrosion and/or lack of lubrication. In these areas, periodic
inspections should be performed until the operator can set his own inspection periods based on experience or an approved
condition monitoring system.
NOTE:
3.
The date on the "ORIGINAL STANDARD AIRWORTHINESS CERTIFICATE", FAA Form No. 8100-2, which
is issued with each new airplane, is to be used as the basis for all TBO or replacement components
listed in the following schedule.
NOTE:
Textron Aviation Inc. recommends that operators record the number of cycles used on individual
components for purposes of complying with inspections based on cycle count.
NOTE:
For purposes of establishing intervals listed hereafter, the experience of Textron Aviation Inc. indicates
that each component experiences approximately one cycle per airplane flight hour in normal operation.
NOTE:
Items not listed in the Overhaul and Replacement Schedule are to be overhauled or replaced "On
Condition". If "On Condition" items are worn, inoperative, inaccurate, intermittent and are not repairable
through normal maintenance practices, they must be overhauled or replaced.
Overhaul and Replacement Schedule
A.
Landing Gear
ITEM
Actuator (Hydraulic), Nose Gear(Ref. Chapter 32)
Actuator (Hydraulic), Main Gear(Ref. Chapter 32)
Actuators (Mechanical)(Ref. Chapter 32)
Main Gear Wheels, Bearings and Tires(Ref. Chapter 32)
Nose Gear Wheels, Bearings and Tires(Ref. Chapter 32)
Nose Gear Retract and Emergency Extension Chains
(Mechanical)(Ref. Chapter 32)
Landing Gear Motor (Mechanical)(Ref. Chapter 32)
Landing Gear Retraction and Extension Teflon Hydraulic
Hoses(Ref. Chapter 32)
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
OVERHAUL OR REPLACE
Overhaul or replace if hydraulic fluid leaks are noted or if the
lock indicator switch fails to operate properly.
Overhaul or replace if hydraulic fluid leaks are noted.
Overhaul or replace every 8,000 cycles or 6 years whichever
occurs first.
Refer to the King Air Series Component Maintenance Manual
for limits.
Refer to the King Air Series Component Maintenance Manual
for limits.
Replace chains when allowable wear limits specified in
RETRACT CHAINS INSPECTION AND REPLACEMENT
procedure are exceeded.
Overhaul every 8,000 cycles or 6 years whichever occurs first.
This overhaul is to coincide with the inspection of the gearbox.
Replace 10 years from the factory airplane certification date
and every 10 years thereafter or on condition, whichever
occurs first.
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King Air 90 Series Maintenance Manual (Rev D1)
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Landing Gear Hydraulic System Filter and Packing(Ref.
Chapter 32)
B.
Replace filter and packing at first 200-hour inspection and
every 1,200 hours or 1,000 landing cycles thereafter,
whichever occurs first. In addition to these replacement
frequencies, whenever a hydraulic component is replaced, this
filter must be replaced after the system has been checked for
operation. This filter must also be replaced at the next
inspection after the component replacement was made.
Brake System
ITEM
Main Gear Brakes(Ref. Chapter 32)
OVERHAUL OR REPLACE
Refer to the King Air Series Component Maintenance Manual
for limits.
Brake System Hoses (Only hoses exposed in wheel well)(Ref. 5 years from the date of delivery and every 5 years thereafter.
Chapter 32)
C.
Electrical System
ITEM
D.
OVERHAUL OR REPLACE
Emergency Locator Transmitter Battery(Ref. Chapter 25)
Check expiration date and replace as required.
Cockpit Voice Recorder Underwater Locator Beacon (LJ1353 and After)(Ref. Chapter 23)
Functionally test the unit and the batteries every 2 years to
make sure proper operation. Replace batteries every 6 years.
Power Plant
ITEM
Engine TBO
OVERHAUL OR REPLACE
Refer to Pratt & Whitney Service Bulletin No. 1803 or
subsequent.
NOTE:
A TBO (Time Between Overhaul) recommendation is in no way to be construed as a warranty or engine life
proration basis. The TBO recommendation is based on the projected time for most advantageous initial overhaul.
The individual operators experience may indicate a departure in either direction from the recommended TBO for
the particular operation.
E.
P3 Air Filter (LJ-1727, LJ-1754, LJ-1756 and After)
Replace at 1,000 hours. Refer to applicable engine
maintenance manual.
Engine Oil Filter(Ref. Chapter 12)
Replace every 1,000 hours. Refer to applicable engine
maintenance manual.
Engine Accessories
ITEM
Starter-Generator (Ref. Chapter 24)
Overspeed Governor
Propeller Governor
Fuel Topping Governor
F.
OVERHAUL OR REPLACE
Replace or Overhaul every 1,000 hours.
Refer to Woodward Service Bulletin 33580A or subsequent.
Refer to Pratt and Whitney Service Bulletin No. 1803 or
subsequent.
Refer to Pratt and Whitney Service Bulletin No. 1803 or
subsequent.
Propeller
ITEM
Propeller (3-Bladed)
Propeller (4-Bladed)
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
OVERHAUL OR REPLACE
Refer to Hartzell Service Letter 61M or subsequent.
Refer to Hartzell Service Letter 61M or subsequent or, to
McCauley Service Bulletin 137B or subsequent.
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King Air 90 Series Maintenance Manual (Rev D1)
05-11-00 (Rev D0)
G.
Fuel System
ITEM
Firewall Shutoff Valve(Ref. Chapter 28)
H.
Replace when the leakage rate reaches 2.0 c.c. per minute.
Air-Conditioning and Pressurization System
ITEM
I.
OVERHAUL OR REPLACE
OVERHAUL OR REPLACE
Combustion Heater (LJ-1 thru LJ-501)
Refer to Janitrol Aero Service Bulletin 55 or subsequent.
Heater Ignition Vibrator (LJ-1 thru LJ-501)
Every 2,000 hours of operation.
Heater Ignition Vibrator Switch Points (LJ-1 thru LJ-501)
Every 600 hours of operation.
Supercharger (LJ-1 thru LJ-501) (Ref. Chapter 21)
Every 2,400 hours of operation.
Supercharger Gearbox (LJ-1 thru LJ-501) (Ref. Chapter 21)
Supercharger Gearbox Oil Filter (LJ-1 thru LJ-501) (Ref.
Chapter 12)
Supercharger Hydraulic Pump Filter (LJ-1 thru LJ-113, except
LJ-76) (Ref. Chapter 12)
Every 3,600 hours of operation.
Replace every 200 hours of operation.
Evaporator Air Filter(s) (LJ-1 thru LJ-75) (Ref. Chapter 12)
Replace every 400 hours.
Recirculation Air Filter (LJ-1 thru LJ-75) (Ref. Chapter 12)
Replace every 400 hours.
Evaporator Air Filter (LJ-76 and After, LW-1 and After) (Ref.
Chapter 12)
Replace every 400 hours.
Pressurization Control Filter (LJ-572 thru LJ-574, LJ-641 and
After, LW-123 and After; LJ-76 thru LJ-571, LJ-575 thru LJ640, and LW-1 thru LW-122 With Kit. 100-4004-1) (Ref.
Chapter 12)
Replace every 800 hours of operation and clean filter housing.
Pneumatic System Hose Couplings (LJ-6 thru LJ-716; LW-1
thru LW-223) (Ref. Chapter 36)
Replace the two 106200H hose couplings every five years.
Replace filter every 200 hours of operation (oil change at the
first 200 hours of operation and at each 600 hours thereafter).
Utility Systems
ITEM
Windshield Wiper Blade Assembly (Ref. Chapter 30)
OVERHAUL OR REPLACE
When the blade does not clear wipe area effectively.
Engine Fire Extinguisher Cylinder (Ref. Chapter 26)
(Ref. King Air 90 Series Airworthiness and Limitations
Manual)
Engine Fire Extinguisher Cartridge (Squib)(Ref. Chapter 26) (Ref. King Air 90 Series Airworthiness and Limitations
Manual).
Instrument Air Filter (LJ-1 thru LJ-1846, LJ-1848 thru LJ-1852) Replace every 800 hours, or more often, if conditions
(Ref. Chapter 37)
(operation in heavy smoke or dust) warrant.
Pneumatic Flow Control Unit Solenoid Valve Filter (Ref.
Replace filter P/N 1520161 every 600 hours. Replace filter
Chapter 21)
P/N 1520173 and packing furnished in Kit. 1520174 when
obstructions cannot be removed by cleaning. Clean every 800
hours.
J.
Oxygen Systems
ITEM
Oxygen Cylinder (Lightweight Composite) (Ref. Chapter 35)
Oxygen Cylinder (Standard Weight) DOT 3AA 1800 (Ref.
Chapter 35)
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
OVERHAUL OR REPLACE
(Ref. King Air 90 Series Airworthiness and Limitations
Manual)
(Ref. King Air 90 Series Airworthiness and Limitations
Manual)
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King Air 90 Series Maintenance Manual (Rev D1)
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Oxygen Cylinder (Lightweight) DOT 3HT 1850 (Ref. Chapter
35)
K.
(Ref. King Air 90 Series Airworthiness and Limitations
Manual)
Fuselage and Associated Structure
ITEM
OVERHAUL OR REPLACE
Fuselage (Ref. Chapter 53)
The inspections listed in Chapters 05 and 53-10-00, 601 and
the replacement items listed below are required for continued
airworthiness.
Cabin Entrance Door Forward and Aft Side Latches or
Bayonets (Ref. Chapter 52)
Replace every 5,000 cycles.
Upper Door Hook Mechanism (Includes the pins, bracket,
spring, arm and hooks) (Ref. Chapter 52)
Replace every 10,000 cycles.
Eight Wing Attach Bolts (Ref. SIRM, Chapter 57)
Replace as outlined in the Structural Inspection and Repair
Manual.
Windshield Attach Screws (Ref. Chapter 56)
Replace all screws every 10,000 cycles. Tighten screws to 20
inch-pounds.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 4 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-00 (Rev D0)
SCHEDULED INSPECTION PROGRAM
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
1.
Phase Inspection Program
NOTE:
Additional inspections may be required by engine or propeller manufactures in their manuals. Refer to the
unscheduled maintenance checks portion of the supplier issued manuals to ensure continued
airworthiness.
A.
B.
C.
D.
The owner/operator is ultimately responsible for maintaining the airplane in an airworthy condition, including compliance with all
applicable Airworthiness Directives as specified in Part 39 of the Federal Aviation Regulations (FAR) under the Title 14 of the
Code of Federal Regulations. The owner/operator should select only qualified personnel to maintain the airplane, and ensure
that the airframe and power plant mechanic inspecting the airplane has access to all necessary manuals and service
information as well as to an approved inspection guide.
Airframe and power plant mechanics must have had previous experience in the satisfactory performance of the tasks required
by this inspection before being qualified to supervise, approve and return to service the airplane or any part thereof in need of
maintenance, preventative maintenance, repair or alteration.
It is further the responsibility of the owner/operator to ensure that the airplane is inspected in conformity with the requirements
covered in 14 CFR Part 91.409 (f) (3) of the Federal Aviation Regulations. This FAR Part covers the requirements concerning
approved airplane inspection programs. Textron Aviation Inc. has prepared the Inspection Program to assist the owner or
operator in meeting the foregoing responsibilities.
It is the responsibility of the owner or operator to obtain specific approval from their local airworthiness authority for any
alteration to the inspection Program.
NOTE:
E.
F.
G.
When warranted by service experience or engineering recommendations, an approved maintenance
program, including the inspection intervals, may be changed at any time with the approval of the local
airworthiness authority.
This document is a portion of the publications by which Textron Aviation Inc.provides the inspection requirements and
maintenance schedules for the continued airworthiness of the airframe of your airplane. Remember, maintenance requirements
for some supplier components (such as engines, propellers, avionics and other equipment) are separately provided by their
respective manuals. Those maintenance requirements and schedules are adopted by reference in the airframe maintenance
instructions for continued airworthiness. Have your maintenance personnel review the equipment installed on your airplane to
ensure the current, up-to-date supplier maintenance publications and manuals are available and that all required maintenance is
scheduled and performed as required under 14 CFR 91.403 (c).
This Inspection Program is provided to enable the owner/operator to inspect and maintain the airplane on an ongoing basis.
Included in the program is a sequence for conducting the program along with suggested times. The times and sequence are
recommendations that may be altered to suit a particular operation. While this program may be used as an outline, detailed
information of the systems and components in the airplane will be found in the various chapters/sections of the maintenance
manual and the pertinent supplier publications. It is also recommended that reference be made to the applicable maintenance
handbooks, service instructions, applicable FAA Regulations, Publications and supplier's specification for torque values,
clearance, settings, tolerances and other requirements.
This program is not intended to be all-inclusive, for no such program can replace the good judgement of a certified airframe and
power plant mechanic in the performance of his duties.
NOTE:
2.
In addition to the inspections prescribed by this schedule, the altimeter instrument and static system
and all ATC transponders MUST be tested and inspected in compliance with the requirements specified
in 14 CFR 91.411 and 91.413 at 24-month intervals or anytime the system is opened.
NOTE:
Information contained herein is applicable to Beech King Air 90 airplanes except where differences are
indicated by serial number effectivity.
Special Conditions Cautionary Notice
CAUTION: The time periods in this schedule do not constitute a guarantee the item will reach the period without
malfunction as the aforementioned factors cannot be controlled by the manufacturer.
WARNING: Use only genuine Textron Aviation Inc.-approved parts obtained from Textron Aviation Inc. approved
sources in connection with the maintenance and repair of Textron Aviation Inc. airplanes to assure that the
airplane is returned to service in a condition at least equal to its original or properly altered condition.
Genuine Textron Aviation inc. parts are produced and inspected under rigorous procedures to ensure
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 1 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-00 (Rev D0)
airworthiness and suitability for use in Textron Aviation Inc. airplane applications Parts purchased from
sources other than Textron Aviation Inc., even though outwardly identical in appearance, may not have had
the required tests and inspections performed, may be different in fabrication techniques and materials, and
may be dangerous when installed in an airplane.
WARNING: Salvaged airplane parts, reworded parts obtained from non- Textron Aviation Inc. sources, or parts,
components, or structural assemblies, the service history of which is unknown or cannot be authenticated,
may have been subjected to unacceptable stresses or temperatures or have other hidden damage not
discernible through routine visual or usual nondestructive testing techniques. This may render the part,
component, or structural assembly, even though originally manufactured by Textron Aviation Inc.,
unsuitable and unsafe for airplane use.
WARNING: Textron Aviation Inc. expressly disclaims any responsibility for malfunctions, failures, damage or injury
caused by use of non-Textron Aviation Inc.-approved parts or procedures.
A.
3.
The time periods for the inspections noted in this schedule are based on normal usage under average environmental
conditions. Airplanes operated for Air Taxi or other than normal operations and airplanes operated in humid tropics, or in cold
damp climates, etc., may need more frequent inspections for wear, corrosion, lubrication, and/or lack of maintenance. Under
these adverse conditions, perform periodic inspections in compliance with this guide at more frequent intervals until the owner
or operator can set his own inspection periods based on the contingencies of field experience.
Scheduled Inspection General Information
A.
Inspection Interval Tolerance
To facilitate scheduling inspection, Textron Aviation Inc. authorizes the following inspection interval tolerances:
(1) Phase Inspections (Hour Interval)
(a) A tolerance of ± 20 hours is allowed. Each phase inspection must be completed within 20 hours of the prescribed
time.
(b) EXAMPLE: A PHASE 1 INSPECTION, due at 200 hours, may be accomplished anytime between 180 and 220
hours. A PHASE 2 INSPECTION, due at 400 hours, may be accomplished anytime between 380 and 420 hours, etc.
(2) Special Inspection Items - Calendar Date Limited
(a) A tolerance of ±12 days per 12 calendar months is allowed, not to exceed a total of 60 calendar days.
(3) Special Inspection Items - Flight Cycle Limited
(a) A tolerance of ±10% is allowed.
(4) Special Inspection Items - Hourly Limited
(a) A tolerance of ±10% is allowed.
NOTE:
B.
Tolerances specified by supplier's, DOT regulations or FAA regulations take precedence over
inspection intervals and tolerances authorized by Textron Aviation Inc..
Purpose and Use
(1) The Textron Aviation Inc.-recommended Beech King Air 90 Inspection Program is provided to maintain the Beech King Air
90 airplanes that are utilized by owners and operators on a continuous basis. The complete program must be
accomplished at least one time every 24 calendar months.
NOTE:
Owners and operators wishing to utilize inspection intervals of less than 200 hours may do so
without obtaining Textron Aviation Inc. concurrence. Refer to the latest revision of this form for
inspection procedure details to meet 14 CFR 91.409 (f) (3).
(2) Inspection timetables are a follows:
•
Inspection Phase 1: To be performed at 200 hours and every 800 hours thereafter.
•
Inspection Phase 2: To be performed at 400 hours and every 800 hours thereafter.
•
Inspection Phase 3: To be performed at 600 hours and every 800 hours thereafter.
•
Inspection Phase 4: To be performed at 800 hours and every 800 hours thereafter.
(3) Alternate Phase Inspection : If an aircraft is not flown at least 400 hours in 24 months, the owner/operator may perform
scheduled phase inspections 1 and 2 together within 12 months after the last aircraft inspection; then the owner/operator
may perform scheduled phase inspections 3 and 4 together within 12 months after completing the phase 1 and 2
inspections.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 2 of 4
Print Date: Thu Jan 11 11:03:36 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-00 (Rev D0)
NOTE:
Textron Aviation Inc. recommends that no aircraft exceed 12 months without completing at least
one phase inspection.
(4) Special Inspections : Although this inspection program is based on 200-hour intervals, there are items which require
more, or less, frequent inspection or whose inspection interval is based on flight time, calendar elapsed time, or cycles.
These unique inspection items and their time intervals are described under SPECIAL INSPECTIONS and should be
reviewed prior to commencing any scheduled inspection.
(5) A complete scheduled inspection (all Phase 1, 2, 3 and 4 Inspections) must be accomplished within a 24-calendar-month
period. Any part of the inspection which has not been accomplished will become due immediately. Completion of the
Phase 1, 2, 3 and 4 Inspections shall be considered as a complete inspection.
NOTE:
Textron Aviation Inc.'s Recommended Inspection Program in accordance with 14 CFR 91.409 (f) (3)
consists of, but is not limited to, inspection items listed in this Inspection Guide, any applicable
Airworthiness Directives issued against the airframe or any equipment installed therein, conformity
to Type Certificate Data Sheet and Maintenance Manual Chapter 04 as applicable.
WARNING: Ascertain that all placards are in place and legible whenever the airplane has been repainted or
touched up after repairs. Replace any placards that have been inadvertently defaced or removed.
(6) While this guide may be used as an outline, detailed information of the many systems and components in the airplane will
be found in the various sections/chapters of this Maintenance Manual and the Engine Maintenance Manual. Reference to
the Engine Maintenance Manual is to the Pratt & Whitney Canada PT6A-6, -6/C20, -20A, -21 or -28 Maintenance Manual.
It is also recommended that reference be made to the applicable supplier maintenance handbooks, Textron Aviation Inc.
service bulletins, applicable FAA Regulations and supplier bulletins and specifications for torque values, clearances,
settings, tolerances and other requirement. It is the responsibility of the owner or operator to ensure that the airframe and
power plant mechanic inspecting the airplane has access to the previously noted documents as well as to this inspection
guide.
(7) Textron Aviation Inc. issues service information for the benefit of owners and fixed-base operators in the form of two
classes of service bulletins. The first class, MANDATORY Service Bulletins (red border) are changes, inspections and
modifications that could affect safety or crashworthiness. Textron Aviation Inc. considers compliance with these service
bulletins to be mandatory. Textron Aviation Inc. also issues a service bulletin having no border designated as either
RECOMMENDED or OPTIONAL in the compliance section within the bulletin. In the case of a RECOMMENDED Service
Bulletin, Textron Aviation Inc. feels the changes, modifications, improvements or inspections will benefit the owner/operator
and although highly recommended, they are not considered mandatory at the time of issuance. In the case of OPTIONAL
Service Bulletins, the changes, modifications, improvements or inspections compliance s at the owner/operator's
discretion.
(8) In the final analysis it is the responsibility of the owner or operator to ensure that all Textron Aviation Inc. service bulletins
which are pertinent to his particular operation are complied with.
Table 1. Inspection Schedule Outline
A/C TIME
(HOURS)
200
400
1
INSPECTION PHASE
2
3
X
X
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
4
TYPE OF INSPECTION
Nose Landing Gear Area, Nose Gear, Pilot's
Compartment, Cabin Section, Rear Fuselage
and Empennage, Wings, Main Gear Area,
Engines, Landing Gear Retraction, Operational
Inspection, Post Inspection.
Nose Section, Nose Avionics Compartment,
Nose Landing Gear Area, Nose Gear, Pilot's
Compartment, Cabin Section, Rear Fuselage
and Empennage, Wings, Main Landing Gear
Area, Engines, Landing Gear Retraction,
Operational Inspection, Post Inspections.
Page 3 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-00 (Rev D0)
600
800
Nose Landing Gear Area, Nose Gear, Pilot's
Compartment, Cabin Section, Rear Fuselage
and Empennage, Wings, Main Landing Gear
Area, Engines, Landing Gear Retraction,
Operational Inspection, Post Inspections.
X
X
Nose Section, Nose Avionics Compartment,
Nose Landing Gear Area, Nose Gear, Pilot's
Compartment, Cabin Section, Rear Fuselage
and Empennage, Wings, Main Landing Gear
Area, Engines, Landing Gear Retraction,
Operational Inspection, Post Inspection.
AFTER THE "PHASE 4" INSPECTION IS COMPLETED, REPEAT THE INSPECTION SEQUENCE.
C.
D.
Definitions
The terminology pertaining to the inspection procedures and their use is defined as follows:
(1) Flight Time - Flight time shall mean the total time from the moment the airplane first moves under its own power for the
purpose of flight until the moment it comes to rest at the next point of landing. ("Block-to-block" time).
(2) Maintenance - Means inspection, overhaul, repair, preservations and the replacement of parts, but excludes preventive
maintenance.
(3) Pilot in Command - Pilot in command shall mean the pilot responsible for the operation and safety of the airplane during
the time defined as flight time.
(4) Preventive Maintenance - Means simple or minor preservative operations and the replacement of small standard parts not
involving complex assembly operations.
(5) Time in Service - Time in Service, as used in computing maintenance and inspection time records, is the time from the
moment the airplane leaves the ground until it touches the ground at the end of the flight.
(6) Flight Cycle - A flight cycle is defined as: Engine start-up and increase to full or partial power (as required during a normal
flight), one landing gear retraction and extension and a complete shutdown.
(7) Corrosion - Pitting, or a surface breakdown of a material due to chemical or electro-chemical attack by atmosphere,
moisture or other agents.
(8) Wear - Material or part consumed as a result of exposure to operation or usage.
(9) Damaged - Rendered unusable for its intended purpose.
(10) Calendar Time - The time from the date on the "ORIGINAL AIRWORTHINESS CERTIFICATE", FAA Form No. 8100-2,
which is issued with each new airplane, to be used as the basis for all TBO or of replacement components.
(11) Special Inspection - Inspections of components or systems based on calendar time, hours or cycles which do not coincide
with the scheduled inspection.
(12) Unscheduled Maintenance Checks - Inspections and checks for damage after operating the airplane in conditions which
could require unscheduled maintenance, i.e. lightning strikes, hard landing, polluted atmospheric conditions, etc.
Discrepancies
(1) Discrepancies that affect the airworthiness of the airplane will require the necessary corrective action to be accomplished
before the airplane is returned to service.
(2) Discrepancies that do not affect the airworthiness of the airplane may, at the discretion of the owner/operator, be carried
over to the next inspection period. All discrepancies thus carried over should be retained in the ship file until corrected.
(3) Discrepancies which occur during flight should be entered on the "In-Flight Work Sheet" by the pilot in command or another
responsible person.
(4) Forms for the "In-Flight Work Sheet", "Scheduled Inspection Work Sheet", and "Overhaul and Replacement Work Sheet"
are provided at the end of subchapter 05-00-00, 001. These forms may be copied for use during each phase of the
inspection.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 4 of 4
Print Date: Thu Jan 11 11:03:36 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 1) - INSPECTION/CHECK
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Scheduled Inspection Program (Phase 1)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH:
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N:
LH Prop Total Time :
RH Prop S/N:
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Nose Section
ATA REFERENCE
1.
B.
INSP
MECH
INSP
COMBUSTION HEATER (LJ-1 thru LJ-501)
a.
Check the gap and condition of the heater
spark plug.
21-40-07, 201
b.
Check fuel plumbing, pump and regulator
for leakage, damage and security of
attachment.
21
c.
Perform the HEATER FUEL FILTER
ELEMENT CLEANING procedure.
d.
On LJ-1 thru LJ-53 that have complied with
Service Letter 66-4, and on LJ-54 thru LJ501, check the fuel heater for operation,
condition and attachment.
21
e.
Inspect the heater drain lines for
obstructions.
21
f.
Perform the CABIN HEAT OUT WARNING
LIGHT FUNCTIONAL CHECK procedure.
21-40-01, 701
21-40-00, 601
Nose Avionics Compartment
NOTE:
C.
MECH
There are no inspections required in this section during this phase.
Nose Landing Gear Area
ATA REFERENCE
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 1 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
1.
D.
ELECTRICAL WIRING and EQUIPMENT Inspect all exposed electrical wiring and
equipment for chafing, damage and security of
attachment.
AC43.13-1B/2B
Nose Gear
ATA REFERENCE
1.
2.
INSP
WHEEL
a.
Inspect wheel for wear, damage and
corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
32
CMM
a.
Inspect for wear and deterioration.
12
CMM
b.
Check for correct inflation.
TIRE
12-20-15, 301
CMM
3.
SHIMMY DAMPER - Inspect for leaks, security
and attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for
cracks, damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect
steering stop for damage or distortion.
6.
LANDING and TAXI LIGHTS - Inspect for broken
lenses or bulbs on LJ-502 thru LJ-1062; LW-1
and After.
33
STEERING LINKAGE - Inspect nose gear
steering mechanism and attaching hardware for
wear, damage and corrosion.
32
8.
NOSE LANDING GEAR STRUT - Check strut for
leakage and correct extension.
32
9.
NOSE GEAR RETRACT AND EXTENTION
CHAIN (Exterior and interior)
7.
MECH
a.
32
Inspect chain for broken links, excessive pin
and link wear, misalignment, rust, corrosion
and dirt.
32
b.
Check sprockets for excessive wear and
hook-shaped teeth.
32
c.
Check chain for proper tension.
32
d.
Check nose gear and nose gear linkage
clearance from electrical wires and
obstructions.
32
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 2 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
10. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, proper routing of
wire bundles and security of attachment.
E.
AC43.13-1B/2B
Flight Compartment
ATA REFERENCE
1.
2.
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal (Silicone)
for debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal
(Polysulfide) for debonding, cracks or
wear.
56
WINDOWS
b.
c.
Inspect exterior surface of cockpit side
windows for scratches, cracks, chips,
excess crazing or any indication of
delamination.
56
Inspect for any contact of the milled edge of
the window with the airframe skin. Correct
window contact by reinstalling and
recentering the window in the airframe
opening.
56
Inspect for any damage from paint
strippers, solvents or any unapproved
sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all
moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for
damage and wear.
25
5.
PORTABLE FIRE EXTINGUISHER - Inspect the
bottle for signs of damage and mount for
security of attachment.
26
CMM
6.
SEATS, SEAT BELTS and SHOULDER
HARNESSES - Inspect seat belts and shoulder
harnesses for deterioration or missing
components.
25
8.
INSP
WINDSHIELD
a.
7.
MECH
BRAKE FLUID RESERVOIR PRESSURE
EQUALIZATION ORIFICE - Clean and flush
orifice of contaminants.
UPHOLSTERY PANELS - Inspect for security of
attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
32-40-03, 701
25
Page 3 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
9.
FLIGHT CONTROL CABLE TENSION - Inspect
and record aileron cable tension:
TEMPERATURE:____ °F
CONTROL COLUMN INTERCONNECT CABLE
TENSION: ______
1/8 in. AILERON CABLE TENSION:
LEFT _____ RIGHT____
27
10. HEATING SYSTEM
a.
Check all ducts for damage and
deterioration.
b.
Check bleed air ducts (LJ-502 thru LJ1062; LW-1 and After) for damage,
insulation and adequate clearance of
electrical wiring and control cables.
CAUTION:
Prior to installing flight compartment
floor panels, visually inspect the entire
length of the elevator control cable in
this area to assure adequate clearance
between the cable and electrical wiring,
bleed air ducts, bleed air duct clamps,
and structural components to prevent
chaffing and wear.
F.
21
21
Cabin Section
ATA REFERENCE
1.
WINDOWS - Inspect exterior surface of
windows for deep scratches, cracks, chips and
excessive crazing or other damage.
56
2.
ROTATING or FLASHING BEACON - Inspect
for cracked or broken lenses.
33
3.
ACCESS DOORS - Inspect for fit and
attachment.
4.
OUTFLOW and SAFETY VALVES - Drain
outflow valve control line.
21
5.
SEAT TRACKS - Inspect seat tracks for
damage and wear.
25
6.
SEAT BELTS and SHOULDER HARNESSES
7.
MECH
INSP
06-50-00, 001
a.
Inspect seats and shoulder harnesses for
deterioration or missing components.
25
b.
Inspect shoulder harness attachment posts
for cracked, worn, brittle or missing
grommet (If Installed).
25
OXYGEN SYSTEM
a.
Test all outlets and masks for oxygen flow.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
35
Page 4 of 23
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
b.
G.
Inspect oxygen system installation for
damage and security of attachment.
35
8.
TOILET (If Installed) - Inspect for spillage and
leakage below the toilet.
38
9.
CABIN ENTRANCE DOOR
a.
Inspect the door seal for cuts, abrasions
and security of attachment.
52
b.
Inspect the cabin door support cables for
wear, damage and security.
52
10. PORTABLE FIRE EXTINGUISHER - Inspect
bottle for damage and security of attachment.
26
CMM
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and
inspect.
2.
ELT BATTERY
Inspect for leakage, corrosion or loose
connections.
25
b.
Determine remaining useful life.
25
NAVIGATION LIGHTS and ROTATING
(Flashing) BEACONS - Inspect for broken or
cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security
of attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the
drain holes in the bottom of the ventral fin for
obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration,
damage and attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect
the drain holes for obstructions.
27
8.
STATIC WICKS
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
INSP
53-10-00, 601
a.
3.
MECH
Page 5 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
9.
FLIGHT CONTROL CABLE TENSION - Inspect
and record elevator, elevator tab, rudder and
rudder tab cable tension:
TEMPERATURE:_____ °F
ELEVATOR CABLE TENSION: UP
______DOWN_____
ELEVATOR TAB CABLE TENSION:_________
RUDDER CABLE TENSION: LEFT
______RIGHT_______
RUDDER TAB CABLE TENSION: ________
H.
27
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the
wing center section and outboard wing upper
attachment fittings.
SIRM
3.
INSP
LIGHTS
a.
4.
MECH
Inspect the navigation and recognition (if
installed) lights for broken or cracked
lenses.
33
b.
Inspect the strobe light for broken or
cracked lenses, if installed.
33
c.
Inspect the landing lights for broken or
cracked lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
c.
5.
INTERGRAL FUEL TANK (LW-1 and After) Inspect the exterior surface of the intergral tank
access doors for leaks.
06-50-00, 001
28
6.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
7.
ACCESS DOORS (Inspection Panels) - Inspect
for fit and attachment.
06-50-00, 001
8.
STATIC WICKS
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 6 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
9.
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the
CHECKING AILERON TAB FREE PLAY
procedure.
27-10-15, 601
10. FLIGHT CONTROL CABLE TENSION - Inspect
and record aileron and aileron tab cable
tension:
TEMPERATURE:______ °F
3/16" AILERON CABLE TENSION: LEFT_________
AILERON TAB CABLE TENSION: __________
27
11. LEFT-HAND OUTBOARD WING - Inspect skin,
structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
SIRM
12. LEFT-HAND OUTBOARD FLAP - Inspect skin,
structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
27
13. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, proper routing of
wire bundles and security of attachment.
AC43.13-1B/2B
14. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
a.
b.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables that
have more than three broken wires in any
given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
15. FLAP and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator
for attachment.
b.
Inspect flap tracks for wear.
16. FUEL PLUMBING - Inspect for leaks, chafing or
damage and attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
27
27-50-01, 601
28
Page 7 of 23
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
17. HINGED ACCESS DOORS (Inside wing
access panels 13 and 14) - Inspect for cracks
or damage to hinge and fasteners.
I.
06-50-00, 001
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
Inspect the exterior of the center section
for leaks.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing for flexibility, splits, cracks, or
distortion.
28
Inspect the exterior openings of the vents
for obstructions.
28
CENTER SECTION - Inspect Aux Fuel Cell
inboard probe for security, leaks, corrosion and
general condition. Removal of the inboard
probe cover required. Defuel the effected tank
as required to remove the inboard probe.
28
NACELLE FUEL CELL and PROBE - Inspect
for microbiological sludge buildup. If sludge is
found, inspect all fuel probes, tanks, fuel lines
and replace the fuel filter. Clean as required. If
needed, use BIOBOR JF or Kathon FP 1.5
additive.
28
12
5.
ACCESS DOORS (Inspection Panels) - Inspect
for fit and attachment.
06-50-00, 001
6.
FUEL PUMPS - Inspect the pumps for leaks
and security of attachment.
28
7.
SUPERCHARGER MOTOR - (LJ-1 thru LJ-113
except LJ-76) - Inspect for leaks and general
condition.
21
FLOW CONTROL VALVE - (LJ-1 thru LJ-501) Inspect valve and associated equipment ducts
for damage, deterioration and attachment.
21
LEFT-HAND WING CENTER SECTION AREA
- Inspect wing center section and inboard flap,
skin structure and attaching hardware for wear,
damage and corrosion. If damage is found in a
given area check the adjacent area.
SIRM
3.
4.
8.
9.
INSP
28
a.
c.
MECH
10. FLAPS and ACTUATORS
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 8 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
a.
Inspect flap 90° drive, cable and actuator
for attachment.
27
b.
Inspect flap tracks for wear.
27
11. LEADING EDGE and NACELLE FUEL
PLUMBING - Inspect fuel plumbing for leaks,
damage and security of attachment.
28
12. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
a.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacement.
27
20
Inspect control cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables that
have more than three broken wires in any
given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
13. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, and proper routing
of wire bundles and security of attachment.
AC43.13-1B/2B
14. BLEED AIR BYPASS VALVE (LJ-502 thru LJ1062, LW-1 and After) - Check bleed air valve
at heat exchanger for operation of linkage to
butterfly valve and operation of actuator motor.
21
b.
J.
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
MECH
INSP
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for
wear, pitting, cracks, discoloration, rust or
other indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion
and security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 9 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
5.
6.
7.
8.
K.
ELECTRICAL WIRING and EQUIPMENT Inspect exposed wiring and equipment for
chafing, damage and proper routing and
security of attachment.
AC43.13-1B/2B
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for
visible damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
DRAG BRACE
a.
Inspect for security of attach fittings.
32
b.
Inspect downlock bolts for proper torque
(finger-tight and safety-wired).
CMM
MAIN LANDING GEAR AREA - Inspect wheel
well and gear door structure, all components
and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found,
check the adjacent area.
32
Left-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller
deice system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the
firewall filter for evidence of foreign matter,
corrosion or microbiological growth in the fuel
system. If any microbiological growth is found,
use BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment (spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal
particles.
P&W
5.
SUPERCHARGER GEARBOX (LJ-1 thru LJ501) - Check the gearbox for leaks and fill
gearbox as required.
12
SUPERCHARGER HYDRAULIC PUMP (LJ-1
thru LJ-113 except LJ-76) - Check for leaks and
general condition.
21
6.
7.
MECH
INSP
SUPERCHARGER HYDRAULIC RESERVOIR
(LJ-1 thru LJ-113 except LJ-76)
a.
Check fluid level.
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12-10-04, 301
Page 10 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
b.
8.
9.
After airplane has stood idle for 4 to 5
hours, check system for leakage by
loosening the cap on the reservoir;
trapped air indicates the system is free of
leakage.
21
INERTIAL ENGINE ANTI-ICER
a.
Check vane(s) for freedom of movement
and correct travel. Lubrication of linkage
and vane hinges may be necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect
plumbing, valve, actuator and limit
switches for damage, leakage, operation
and security of attachment.
30
c.
On LJ-125, LJ-170 thru LJ-241 and
airplanes With Kit 90-4015 installed,
replace or bake dryer cartridge.
d.
On LJ-242 thru LJ-1062, LW-1 and After
and airplanes With Kit 90-9017 installed,
check the push-pull control for damage,
security of attachment, freedom of
movement and full travel.
12-20-05, 301
30
12
30
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of
attachment.
26
b.
Check fire bottle pressure gage.
26
10. MAGNETIC CHIP DETECTOR (If Installed)
a.
b.
L.
Remove and visually inspect plug for metal
particles and damage. For LJ-1 thru LJ672 and LW-1 thru LW-154 With Kits 1009011-1 or -3 installed, LJ-637 thru LJ-691,
LW-155 thru LW-190, perform the
MAGNETIC CHIP DETECTOR 25-HOUR
INSPECTION procedure. For LJ-692 thru
LJ-1062 and LW-191 and After, or prior
serials With Kit 100-9013-1 installed,
perform the MAGNETIC CHIP
DETECTOR INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. For LJ-692 thru LJ-1062, LW191 and After, or prior serials With Kit
100-9013-1 installed, perform the
MAGNETIC CHIP DETECTOR
ANNUNCIATOR TEST procedure.
12-10-03, 301
Right-Hand Outboard Wing
ATA REFERENCE
Copyright © Textron Aviation Inc.
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MECH
INSP
Page 11 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the
wing center section and outboard wing upper
attachment fittings.
3.
SIRM
LIGHTS
a.
4.
28
Inspect the navigation and recognition (if
installed) lights for broken or cracked
lenses.
33
b.
Inspect the strobe light for broken or
cracked lenses, if installed.
33
c.
Inspect the landing lights for broken or
cracked lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
c.
5.
INTERGRAL FUEL TANK (LW-1 and After) Inspect the exterior surface of the intergral tank
access doors for leaks.
06-50-00, 001
28
6.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
7.
ACCESS DOORS (Inspection Panels) - Inspect
for fit and attachment.
06-50-00, 001
8.
STATIC WICKS
9.
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the
CHECKING AILERON TAB FREE PLAY
procedure.
27
10. FLIGHT CONTROL CABLE TENSION - Inspect
and record aileron and aileron tab cable
tension:
TEMPERATURE:_____ °F
3/16" AILERON CABLE TENSION: RIGHT______
AILERON TAB CABLE TENSION: ______
27
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Page 12 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
11. RIGHT-HAND OUTBOARD WING - Inspect
skin, structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
SIRM
12. RIGHT-HAND OUTBOARD FLAP - Inspect
skin, structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
27
13. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, proper routing of
wire bundles and security of attachment.
AC43.13-1B/2B
14. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
a.
b.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables that
have more than three broken wires in any
given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
15. FLAP and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator
for attachment.
b.
Inspect flap tracks for wear.
27
27-50-01, 601
16. FUEL PLUMBING - Inspect for leaks, chafing or
damage and attachment.
28
17. HINGED ACCESS DOORS (Inside wing
access panels 13 and 14) - Inspect for cracks
or damage to hinge and fasteners.
06-50-00, 001
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
a.
Inspect the exterior of the center section
for leaks.
Copyright © Textron Aviation Inc.
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MECH
INSP
28
28
Page 13 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing for flexibility, splits, cracks, or
distortion.
28
Inspect the exterior openings of the vents
for obstructions.
28
CENTER SECTION - Inspect Aux Fuel Cell
inboard probe for security, leaks, corrosion and
general condition. Removal of the inboard
probe cover required. Defuel the effected tank
as required to remove the inboard probe.
28
NACELLE FUEL CELL and PROBE - Inspect
for microbiological sludge buildup. If sludge is
found, inspect all fuel probes, tanks, fuel lines
and replace the fuel filter. Clean as required. If
needed, use BIOBOR JF or Kathon FP 1.5
additive.
28
12
5.
ACCESS DOORS (Inspection Panels) - Inspect
for fit and attachment.
06-50-00, 001
6.
BATTERY
c.
3.
4.
a.
Service as required.
12
b.
Remove battery and inspect the battery
box, cables and vent tubes for
deterioration or obstructions.
24
7.
FUEL PUMPS - Inspect the pumps for leaks
and security of attachment.
28
8.
RIGHT-HAND WING CENTER SECTION
AREA - Inspect wing center section and
inboard flap, skin structure and attaching
hardware for wear, damage and corrosion. If
damage is found in a given area check the
adjacent area.
SIRM
9.
FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator
for attachment.
27
b.
Inspect flap tracks for wear.
27
10. LEADING EDGE and NACELLE FUEL
PLUMBING - Inspect fuel plumbing for leaks,
damage and security of attachment.
11. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
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Page 14 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
a.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacement.
27
20
Inspect control cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables that
have more than three broken wires in any
given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
12. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, and proper routing
of wire bundles and security of attachment.
AC43.13-1B/2B
13. BLEED AIR BYPASS VALVE (LJ-502 thru LJ1062, LW-1 and After) - Check bleed air valve
at heat exchanger for operation of linkage to
butterfly valve and operation of actuator motor.
21
b.
N.
Right-Hand Main Landing Gear Area
ATA REFERENCE
1.
INSP
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for
wear, pitting, cracks, discoloration, rust or
other indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion
and security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT Inspect exposed wiring and equipment for
chafing, damage and proper routing and
security of attachment.
AC43.13-1B/2B
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for
visible damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
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Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
7.
8.
O.
DRAG BRACE
a.
Inspect for security of attach fittings.
32
b.
Inspect downlock bolts for proper torque
(finger-tight and safety-wired).
CMM
MAIN LANDING GEAR AREA - Inspect wheel
well and gear door structure, all components
and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found,
check the adjacent area.
32
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller
deice system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the
firewall filter for evidence of foreign matter,
corrosion or microbiological growth in the fuel
system. If any microbiological growth is found,
use BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment (spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal
particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
6.
7.
a.
Check vane(s) for freedom of movement
and correct travel. Lubrication of linkage
and vane hinges may be necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect
plumbing, valve, actuator and limit
switches for damage, leakage, operation
and security of attachment.
30
c.
On LJ-125, LJ-170 thru LJ-241 and
airplanes With Kit 90-4015 installed,
replace or bake dryer cartridge.
d.
On LJ-242 thru LJ-1062, LW-1 and After
and airplanes With Kit 90-9017 installed,
check the push-pull control for damage,
security of attachment, freedom of
movement and full travel.
MECH
INSP
12-20-05, 301
30
12
30
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of
attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
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Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
a.
b.
P.
Remove and visually inspect plug for metal
particles and damage. For LJ-1 thru LJ672 and LW-1 thru LW-154 With Kits 1009011-1 or -3 installed, LJ-637 thru LJ-691,
LW-155 thru LW-190, perform the
MAGNETIC CHIP DETECTOR 25-HOUR
INSPECTION procedure. For LJ-692 thru
LJ-1062 and LW-191 and After, or prior
serials With Kit 100-9013-1 installed,
perform the MAGNETIC CHIP
DETECTOR INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. For LJ-692 thru LJ-1062, LW191 and After, or prior serials With Kit
100-9013-1 installed, perform the
MAGNETIC CHIP DETECTOR
ANNUNCIATOR TEST procedure.
12-10-03, 301
Landing Gear Retraction
ATA REFERENCE
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly
cycle the landing gear, use only an external power
source capable of delivering and maintaining 28.25 ±
0.25 volts throughout the extension and retraction
cycles when performing the landing gear retraction
inspection.
1.
2.
3.
4.
5.
RETRACT MECHANISM - Check retraction
system for proper operation of all components
through at least two complete cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and
rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
WARNING HORN - Check for proper operation.
32
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Page 17 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
6.
MAIN GEAR DOWNLOCKS - Check locking
mechanism for positive engagement in
extended position.
32
7.
SAFETY SWITCH - Check for security and
proper operation.
32
8.
ACTUATORS - Check for noise, binding and
proper rigging.
32
9.
LIMIT SWITCHES
a.
Check for correct adjustment.
32
b.
Check for security of attachment.
32
10. EMERGENCY EXTENSION - Check system for
freedom of operation and positive engagement
of downlocks.
CAUTION:
Do not continue operation after receiving a
gear-down indication on all gears. Further
movement of the handle could damage the
drive mechanism and prevent subsequent
electrical gear retraction. The landing gear
cannot be retracted manually.
Q.
32
11. NOSE GEAR RETRACT CHAIN (Exterior only)
- Check nose gear and nose gear linkage
clearance from electrical wires and
obstructions.
32
12. PLACARDS - Check that all placards are in
place and are legible.
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to be applied during start and run of the engine. Refer to the
King Air 90 Pilot's Operating Handbook and FAA Approved Airplane Flight Manual for the engine start and run
procedures. Please note some of the operational inspections; light checks; pitot and stall warning checks; door
checks; etc. are not practical to inspect with engines running; in these cases they should be accomplished in the
hangar during the inspection process.
1.
FIREWALL SHUTOFF VALVES - Check for
proper operation.
2.
CROSSFEED VALVE - Check for proper
operation.
3.
BOOST PUMPS - Check for proper operation.
4.
AUXILIARY FUEL TRANSFER JET PUMPS
(LW-1 and After) - Check for proper operation.
5.
STARTER-GENERATOR
a.
Check starter for proper operation.
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Page 18 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
b.
6.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light
illumination.
7.
ENGINE OIL - Check for proper pressure and
temperature limits.
8.
FUEL QUANTITY GAGES - Check for proper
operation.
9.
INTERSTAGE TURBINE TEMPERATURE /
INLET TEMPERATURE - Check for correct
limits on engine start.
10. VACUUM SYSTEM - Check for correct limits.
11. PNEUMATIC PRESSURE GAGE - Check for
correct pressure.
12. GYRO INSTRUMENTS - Check for erratic or
noisy operation.
13. PROPELLERS
a.
Perform low pitch torque check.
76
b.
Perform secondary low pitch stop check.
(If installed)
76
14. AUTOFEATHERING CHECK (If Installed) Refer to AUTOFEATHERING SYSTEM
OPERATIONAL CHECK.
15. PROPELLER
SYNCHRONIZER/SYNCHROPHASER - Refer
to FUNCTIONAL TEST and confirm proper
synchronization.
61-23-00, 601
61
16. PROPELLER GOVERNOR - Check governor
operation (including feathering and reversing).
17. IDLE RPM - Check for correct rpm (both high
and low rpm).
18. AC INVERTERS - Check for proper operation.
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper
operation and cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for proper
operation and cycling.
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Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
22. ELECTRICAL SYSTEM - Perform functional
checks.
24
23. ENVIRONMENTAL SYSTEM - Check for
proper operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation as
outlined in the applicable King Air 90 Pilot's
Operating Handbook and FAA Approved
Airplane Flight Manual Supplement.
25. STALL WARNING - Check for proper
operation.
26. ENGINE FIRE DETECTORS (If Installed) Perform system test according to instructions
found in the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) Perform system test according to instructions
found in the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual.
28. PRESSURIZATION SYSTEM - Check for
proper operation.
NOTE:
Refer to the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane
Flight Manual and perform system test.
29. CONDITION LEVER - Check for clean
shutdown atIDLE-CUT-OFF.
30. PITOT TUBE - Check for proper heating at the
unit and for obstructions.
31. LANDING and TAXI LIGHTS - Check for proper
operation.
32. OUTBOARD WING LIGHTS (Right and Left) Check proper operation of all navigation and
strobe (if installed) lights.
33. COCKPIT LIGHTS - Check for proper
operation.
34. EFIS COOLING BLOWERS (If installed) Check for proper operation.
35. ELECTRIC ELEVATOR TRIM - Check for
proper operation.
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Page 20 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
36. ENGINE and PROPELLER CONTROLS Check for freedom of movement, full travel and
friction-lock operation.
37. STATIC SYSTEM - Inspect alternate air valve
for operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational
check.
30-40-11, 501
39. THRESHOLD LIGHT - Check for proper
operation.
40. CABIN and COMPARTMENT LIGHTS - Check
for proper operation.
41. PILOT'S and COPILOT'S SEATS and SEAT
BELTS - Check seat adjustment mechanism
and shoulder harness inertia reel for operation.
42. CABIN SEATS and SEAT BELTS - Check seat
adjustment mechanism and shoulder harness
inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps (If installed) do
not fold too soon and that they fold
properly without interference.
b.
Check CABIN DOOR / CABIN DOOR
OPEN annunciator for proper operation.
c.
Inspect cabin door damper (If installed) for
leakage and proper operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and
latch mechanism for proper operation.
52
b.
Check that latches open and close freely.
52
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors
for smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE
LIGHTS - Check for proper operation.
47. AILERON (LH and RH) - Check for freedom of
movement.
48. AILERON TRIM TAB - Check trim tab actuator
for smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) Check the operation of the heated vents. They
should be warm to the touch.
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Page 21 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
50. STALL WARNING HEAT - Check for proper
operation.
51. FLAPS and ACTUATORS (Inboard, Outboard,
LH and RH) - Check flaps for noisy or erratic
operation.
52. WING ICING LIGHTS - Check for proper
operation.
53. EXTERNAL POWER RELAY - Check for
proper operation.
R.
54. ENGINE INERTIAL ANTI-ICER - Check for
proper operation and rigging.
30
55. ELEVATOR TRIM TAB ACTUATOR
BUSHINGS - Check for smoothness of
operation. Make sure movement is between
inner and outer bushings.
27
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as
required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUNUP or FLIGHT TEST - Check for oil leaks,
security and attachment of all components.
4.
AIRWORTHINESS DIRECTIVES and
SERVICE BULLETINS - Must be reviewed and
complied with as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
b.
Make sure Special Inspection
requirements are complied with at the
appropriate intervals.
05-21-05, 601
Perform Continuous Corrosion Control
Inspection if required by the environmental
conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies
noted by the pilot must be checked and
corrected as required.
7.
EMERGENCY LOCATOR TRANSMITTER Check for proper operation and make sure ELT
is ARMED before returning airplane to service.
25
OXYGEN SYSTEM PRESSURE - Check for
proper pressure.
12
8.
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MECH
INSP
Page 22 of 23
Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-01 (Rev D0)
9.
EMERGENCY and SURVIVAL EQUIPMENT (If Installed) Make sure all necessary emergency
and survival equipment are installed in the
airplane and serviceable.
10. PLACARDS - Determine that all required
placards are in place and legible.
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books
are filled out properly.
2.
Inspection Completed
I certify that the Phase 1 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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Print Date: Thu Jan 11 11:03:37 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 2) - INSPECTION/CHECK
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Scheduled Inspection Program (Phase 2)
Owner:
W/O Number:
Date In :
Serial No. :
Date Out:
Reg. No.:
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase:
Hourmeter :
Total Cycles:
Researched By:
Total Time:
LH Eng. S/N :
Total Time :
TSOH:
TSHSI :
Total Cycles:
Cycles SOH:
Cycles SHSI:
RH Eng. S/N:
Total Time :
TSOH :
Total Cycles:
Cycles SOH:
TSHSI:
LH Prop S/N :
LH Prop Total Time:
RH Prop S/N:
Cycles SHSI :
RH Prop Total Time :
TSOH:
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Nose Section
ATA REFERENCE
1.
2.
MECH
INSP
AIR-CONDITIONING COMPRESSOR
a.
Inspect for security of attachment and oil leaks.
21
b.
Inspect drive belt for deterioration, wear and
proper tension.
21
c.
Check for proper compressor oil level if oil
leak indications are present.
12
d.
Inspect the integrity and security of the clutch
assembly. Remove the belt from the
compressor. Inspect for freedom of rotation,
bearing roughness and free play (wobble).
Check for corrosion or evidence of
inappropriate wear (belt dust, metal shavings).
Install belt on compressor.
21
COMBUSTION HEATER (LJ-1 thru LJ-501)
a.
Check the gap and condition of the heater
spark plug.
21-40-07, 201
b.
Check fuel plumbing, pump and regulator for
leakage, damage and security of attachment.
21
c.
Perform the HEATER FUEL FILTER
ELEMENT CLEANING procedure.
Copyright © Textron Aviation Inc.
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21-40-01, 701
Page 1 of 24
Print Date: Thu Jan 11 11:03:38 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
On LJ-1 thru LJ-53 that have complied with
Service Letter 66-4, and on LJ-54 thru LJ-501,
check the fuel heater for operation, condition
and attachment.
21
e.
Inspect the heater drain lines for obstructions.
21
f.
Perform the CABIN HEAT OUT WARNING
LIGHT FUNCTIONAL CHECK procedure.
21-40-00, 601
d.
B.
Nose Avionics Compartment
ATA REFERENCE
C.
1.
VACUUM REGULATOR VALVE FILTER - Inspect
for blockage.
12
2.
INSTRUMENT AIR FILTER - Inspect for cleanliness.
12
INSP
MECH
INSP
MECH
INSP
Nose Landing Gear Area
ATA REFERENCE
1.
D.
MECH
ELECTRICAL WIRING and EQUIPMENT - Inspect
all exposed electrical wiring and equipment for
chafing, damage and security of attachment.
AC43.13-1B/2B
2.
FORWARD EVAPORATOR FILTER - Inspect for
cleanliness.
12
3.
REFERIGERANT LINES, SERVICE VALVES and
HIGH-PRESSURE RELIEF VALVES - Inspect lines
and valves for leakage, damage, attachment and
surface corrosion.
21
Nose Gear
ATA REFERENCE
1.
2.
WHEEL
a.
Inspect wheel for wear, damage and
corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
32
CMM
TIRE
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
3.
SHIMMY DAMPER - Inspect for leaks, security and
attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for
cracks, damage or distortion.
Copyright © Textron Aviation Inc.
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12
CMM
12-20-15, 301
CMM
32
Page 2 of 24
Print Date: Thu Jan 11 11:03:38 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
5.
NOSE GEAR STEERING STOP - Inspect steering
stop for damage or distortion.
6.
LANDING and TAXI LIGHTS - Inspect for broken
lenses or bulbs on LJ-502 thru LJ-1062; LW-1 and
After.
33
NOSE GEAR LOWER DRAG LEG - Remove nose
gear drag brace bolt and inspect lower drag leg
hole for corrosion and wear.
32
NOSE GEAR ACTUATOR - Inspect actuator
support brackets for damage, cracks and loose or
missing fasteners.
32
7.
8.
9.
NOSE GEAR RETRACT AND EXTENTION CHAIN
(Exterior and interior)
a.
E.
Inspect chain for broken links, excessive pin
and link wear, misalignment, rust, corrosion
and dirt.
32
b.
Check sprockets for excessive wear and
hook-shaped teeth.
32
c.
Check chain for proper tension.
32
d.
Check nose gear and nose gear linkage
clearance from electrical wires and
obstructions.
32
Flight Compartment
ATA REFERENCE
1.
2.
INSP
WINDSHIELD
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal (Silicone) for
debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal
(Polysulfide) for debonding, cracks or wear.
56
WINDOWS
a.
Inspect exterior surface of cockpit side
windows for scratches, cracks, chips, excess
crazing or any indication of delamination.
56
Inspect for any contact of the milled edge of
the window with the airframe skin. Correct
window contact by reinstalling and recentering
the window in the airframe opening.
56
Inspect for any damage from paint strippers,
solvents or any unapproved sealants.
56
ALTERNATE AIR VALVE - Drain off all moisture.
34
b.
c.
3.
MECH
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
4.
SEAT TRACKS - Inspect seat tracks for damage
and wear.
25
5.
VENTILATION BLOWER - Inspect for dirt, grease,
moisture and security of attachment. Rotate blower
by hand and make sure that it rotates freely. Check
for noise or evidence of worn bearings. Turn on the
blower and check for noise or vibration.
21
6.
HEATING SYSTEM
a.
Check all ducts for damage and deterioration.
b.
Check bleed air ducts (LJ-502 thru LJ-1062;
LW-1 and After) for damage, insulation and
adequate clearance of electrical wiring and
control cables.
CAUTION:
Prior to installing pilot's compartment
floor panels, visually inspect the entire
length of the elevator control cable in this
area to assure adequate clearance
between the cable and electrical wiring,
bleed air ducts, bleed air duct clamps, and
structural components to prevent chaffing
and wear.
F.
21
21
Cabin Section
ATA REFERENCE
1.
G.
WINDOWS - Inspect exterior surface of windows for
deep scratches, cracks, chips and excessive
crazing or other damage.
56
2.
ROTATING or FLASHING BEACON - Inspect for
cracked or broken lenses.
33
3.
ACCESS DOORS - Inspect for fit and attachment.
06-50-00, 001
4.
OUTFLOW and SAFETY VALVES - Drain outflow
valve control line.
21
5.
SEAT TRACKS - Inspect seat tracks for damage
and wear.
25-20-00, 201
6.
PRESSURIZATION DUCTS - Inspect for security of
attachment.
21
7.
UPHOLSTERY PANELS - Inspect for security of
attachment.
25
MECH
INSP
MECH
INSP
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and inspect.
2.
ELT BATTERY
Copyright © Textron Aviation Inc.
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53-10-00, 601
Page 4 of 24
Print Date: Thu Jan 11 11:03:38 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
a.
Inspect for leakage, corrosion or loose
connections.
25
b.
Determine remaining useful life.
25
3.
NAVIGATION LIGHTS and ROTATING (Flashing)
BEACONS - Inspect for broken or cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security of
attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the drain
holes in the bottom of the ventral fin for obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration,
damage and attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect the
drain holes for obstructions.
27
8.
STATIC WICKS
9.
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
EMPENNAGE and CONTROL SURFACES
a.
Check elevator trim tab free play.
27-30-18, 601
b.
Check rudder trim tab free play.
27-20-19, 601
c.
Inspect elevator and rudder hinge brackets
and their spar attach areas.
10. OXYGEN SYSTEM - Inspect plumbing for security
of attachment.
H.
27
35
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the wing
center section and outboard wing upper attachment
fittings.
SIRM
3.
4.
MECH
INSP
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
c.
Inspect the landing lights for broken or cracked
lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing or
flexibility, splits, cracks, or distortion.
28
Inspect the exterior of the wing for leaks.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
7.
STATIC WICKS
c.
8.
I.
06-50-00, 001
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
INTERGRAL FUEL TANK (LW-1 and After) Inspect the exterior surface of the intergral tank
access doors for leaks.
06-50-00, 001
28
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
Inspect the exterior of the center section for
leaks.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for
flexibility, splits, cracks, or distortion.
28
Inspect the exterior openings of the vents for
obstructions.
28
CENTER SECTION - Inspect Aux Fuel Cell inboard
probe for security, leaks, corrosion and general
condition. Removal of the inboard probe cover
required. Defuel the effected tank as required to
remove the inboard probe.
28
4.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
06-50-00, 001
5.
SUPERCHARGER (LJ-1 thru LJ-113 except LJ-76)
- Check Hydraulic Drive system pressure.
21
6.
SUPERCHARGER DUCTS and FIREWALL
PRESSURIZATION SHUTOFF VALVE (LJ-1 thru
LJ-501)
3.
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INSP
28
a.
c.
MECH
Page 6 of 24
Print Date: Thu Jan 11 11:03:38 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
7.
8.
9.
J.
a.
Check supercharger and ducts for condition
and attachment.
21
b.
Inspect firewall pressurization shutoff valve for
condition and freedom of operation.
21
SUPERCHARGER MOTOR - (LJ-1 thru LJ-113
except LJ-76) - Check for leaks and general
condition.
21
FLOW CONTROL VALVE - (LJ-1 thru LJ-501) Inspect valve and associated equipment ducts for
damage, deterioration and attachment.
21
SILENCER - (LJ-1 thru LJ-501) - Check for
deterioration, damage and security of attachment.
21
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
K.
INSP
MECH
INSP
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion and
security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
AC43.13-1B/2B
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
Left-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
Copyright © Textron Aviation Inc.
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30
CMM
Page 7 of 24
Print Date: Thu Jan 11 11:03:38 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
2.
3.
FUEL FILTERS and SCREENS - Inspect the
firewall filter for evidence of foreign matter,
corrosion or microbiological growth in the fuel
system. If any microbiological growth is found, use
BIOBOR JF or Kathon FP 1.5 additive.
12
PROPELLERS
a.
Inspect for damage and attachment (spinner
removal required).
61
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between
the brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct
adjustment, evidence of binding and security
of attachment.
76
Inspect mechanical feedback ring, stop rods
and springs for damage.
61
76
4.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
e.
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect
plumbing, valve, actuator and limit switches for
damage, leakage, operation and security of
attachment.
30
On LJ-125, LJ-170 thru LJ-241 and airplanes
With Kit 90-4015 installed, replace or bake
dryer cartridge. Check main and standby
actuator motors and limit switches for
operation and correct adjustment.
12-20-05, 301
30
On LJ-242 thru LJ-1062, LW-1 and After and
airplanes With Kit 90-9017 installed, check the
push-pull control for damage, security of
attachment, freedom of movement and full
travel.
12
30
c.
d.
6.
7.
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26
MAGNETIC CHIP DETECTOR (If Installed)
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
a.
b.
8.
9.
Remove and visually inspect plug for metal
particles and damage. For LJ-1 thru LJ-672
and LW-1 thru LW-154 With Kits 100-9011-1
or -3 installed, LJ-637 thru LJ-691, LW-155
thru LW-190, perform the MAGNETIC CHIP
DETECTOR 25-HOUR INSPECTION
procedure. For LJ-692 thru LJ-1062 and LW191 and After, or prior serials With Kit 1009013-1 installed, perform the MAGNETIC
CHIP DETECTOR INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. For LJ-692 thru LJ-1062, LW-191
and After, or prior serials With Kit 100-9013-1
installed, perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
ENGINE-DRIVEN FUEL PUMP COUPLING
SHAFT - Inspect for fretting and/or corrosion when
replacing outlet filter.
P&W
COWLING - Remove entire cowling and inspect
skin, structure and attaching hardware for wear,
damage and corrosion.
71
10. OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
79
b.
Inspect drain plug for leakage, security and
lockwire.
79
11. AFT COWLING ACCESS DOOR LATCHES Check adjustment of latches.
12. FIRESEALS - Inspect for condition.
71
13. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage
and corrosion.
78
b.
Inspect the exhaust system and visible
portions of the power turbine for burning,
distortion, damage and cracks.
P&W
14. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for
binding, stiff operation, full travel and friction
lock.
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76
Page 9 of 24
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
b.
Inspect controls, bolts, nuts, cotter pins and
safeties for corrosion, damage and
attachment.
NOTE:
Special attention should be made to the
cambox.
76
Inspect control cables for damage such as
crimps, cuts, abrasions or tight bends. If
exterior covering is ruptured, perform leak test.
12
15. CONTROL CABLE BOOTS - Inspect the control
cable boots for excessive compression, twist, wear
or aging which could cause binding.
76
16. STARTER-GENERATOR - Inspect one set of
brushes for indications of excessive wear or
damage (determine wear by observing diagonal
groove on brush).
24-30-05, 601
c.
17. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's
manual.
P&W
b.
Inspect engine in accordance with the
instructions found in the engine manufacturer's
manual.
P&W
18. IGNITION SYSTEM
a.
b.
IGNITION GLOW PLUGS (LJ-1 thru LJ-922
and LW-1 thru LW-388 Without Kit 100-90141 installed) - Inspect glow plugs.
P&W
IGNITION REGULATOR BOX (LJ-1 thru LJ922 and LW-1 thru LW-388 Without Kit 1009014-1 installed)
P&W
1.
Inspect regulator box and electrical
harness for damage and security of
attachment.
P&W
Inspect that supply cable and ignition
cable connectors are installed and safety
wired.
P&W
SPARK IGNITER PLUGS (LJ-1 thru LJ-922,
LW-1 thru LW-388 With Kit 100-9014-1; LJ923 and After; LW-339 and After) - Inspect the
igniter plugs as described in the engine
maintenance manual.
P&W
IGNITION EXCITER (LJ-1 thru LJ-922, LW-1
thru LW-388 With Kit 100-9014-1; LJ-923 and
After; LW-339 and After)
P&W
1.
P&W
2.
c.
d.
Inspect exciter and electrical harness for
damage and security of attachment.
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Page 10 of 24
Print Date: Thu Jan 11 11:03:38 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
2.
Inspect that supply cable and ignition
cable connectors are installed and safety
wired.
P&W
19. FUEL RECOVERY SYSTEM
a.
FUEL DRAIN COLLECTOR SYSTEM (LJ-1
thru LJ-641 With Kit 100-9008-1S; LW-1 thru
LW-123 With Kit 100-9008-3S; LJ-642 thru
LJ-900; LW-124 thru LW-333).
1.
Check tank, pump, pump filter and
plumbing for leaks and security of
attachment.
71
2.
Perform a leak check on the collector
tank.
71
3.
Check wiring to pump and tank float
switch for damage and security of
attachment.
71
Check pump for proper operation.
71
4.
b.
FUEL PURGE (LJ-901 thru LJ-1062; LW-334
and After)
1.
Remove fuel purge system air tank and
inspect. Clean as required.
71
2.
Remove fuel purge tank filter and inspect
for corrosion. Clean as required.
71
20. ENVIRONMENTAL BLEED AIR FLOW CONTROL
UNIT (LJ-502 thru LJ-1062, LW-1 and After) Inspect valve and associated equipment, electrical
wiring and ducts for damage, security of
connections and attachment.
21
21. INDUCTION SYSTEM and COMPRESSOR INLET
- Inspect the air inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet
screen and inspect the compressor inlet area,
struts, first stage blades and vanes for dirt deposits,
corrosion, erosion, cracks and damage by foreign
objects.
P&W
22. HIGH PRESSURE FUEL PUMP FILTERS - Inspect
the engine-driven high pressure fuel pump filters.
P&W
23. ENGINE TRUSS MOUNT ASSEMBLY
a.
b.
Inspect for cracks, dents, chafing and
corrosion. Special attention should be made
to areas around clamps.
71
Inspect vibration isolators (mounts) for
deterioration, damage and attachment.
71
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
24. ENGINE FIRE DETECTION SYSTEM (If installed) Check all fire detectors for sensitivity and continuity.
26
25. AUTOFEATHER and AUTOIGNITION PRESSURE
SWITCHES - (If Installed) Inspect security of
attachment, leakage and electrical connection for
security.
61
74
26. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of
electrical connectors and wiring.
61
27. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical
connectors and wiring.
61
28. SUPERCHARGER GEARBOX (LJ-1 thru LJ-501) Check gearbox for leaks and fill gearbox as
required.
12
29. SUPERCHARGER HYDRAULIC PUMP (LJ-1 thru
LJ-113 except LJ-76) - Check for leaks and general
condition.
21
30. SUPERCHARGER HYDRAULIC RESERVOIR (LJ1 thru LJ-113 except LJ-76)
L.
12-10-04, 301
a.
Check fluid level.
b.
After airplane has stood idle for 4 to 5 hours,
check system for leakage by loosening the
cap on the reservoir; trapped air indicates the
system is free of leakage.
21
31. OIL PRESSURE SNUBBER (P/N 3R1) with
porous-type element (LJ-572 thru LJ-752; LW-39
thru LW-262) - Clean element.
12
Right-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the wing
center section and outboard wing upper attachment
fittings.
SIRM
3.
4.
MECH
INSP
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
c.
Inspect the landing lights for broken or cracked
lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
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Page 12 of 24
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing or
flexibility, splits, cracks, or distortion.
28
Inspect the exterior of the wing for leaks.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
7.
STATIC WICKS
c.
8.
06-50-00, 001
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
INTERGRAL FUEL TANK (LW-1 and After) Inspect the exterior surface of the intergral tank
access doors for leaks.
06-50-00, 001
28
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
N.
INSP
28
a.
Inspect the exterior of the center section for
leaks.
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for
flexibility, splits, cracks, or distortion.
c.
Inspect the exterior openings of the vents for
obstructions.
28
CENTER SECTION - Inspect Aux Fuel Cell inboard
probe for security, leaks, corrosion and general
condition. Removal of the inboard probe cover
required. Defuel the effected tank as required to
remove the inboard probe.
28
4.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
06-50-00, 001
5.
BATTERY
3.
MECH
28
a.
Service as required.
12
b.
Remove battery and inspect the battery box,
cables and vent tubes for deterioration or
obstructions.
24
Right-Hand Main Landing Gear Area
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
ATA REFERENCE
1.
O.
INSP
MECH
INSP
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion and
security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
AC43.13-1B/2B
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the
firewall filter for evidence of foreign matter,
corrosion or microbiological growth in the fuel
system. If any microbiological growth is found, use
BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS
a.
Inspect for damage and attachment (spinner
removal required).
61
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between
the brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct
adjustment, evidence of binding and security
of attachment.
76
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
Inspect mechanical feedback ring, stop rods
and springs for damage.
61
76
4.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
e.
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect
plumbing, valve, actuator and limit switches for
damage, leakage, operation and security of
attachment.
30
On LJ-125, LJ-170 thru LJ-241 and airplanes
With Kit 90-4015 installed, replace or bake
dryer cartridge. Check main and standby
actuator motors and limit switches for
operation and correct adjustment.
12-20-05, 301
30
On LJ-242 thru LJ-1062, LW-1 and After and
airplanes With Kit 90-9017 installed, check the
push-pull control for damage, security of
attachment, freedom of movement and full
travel.
12
30
c.
d.
6.
7.
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26
MAGNETIC CHIP DETECTOR (If Installed)
a.
b.
Remove and visually inspect plug for metal
particles and damage. For LJ-1 thru LJ-672
and LW-1 thru LW-154 With Kits 100-9011-1
or -3 installed, LJ-637 thru LJ-691, LW-155
thru LW-190, perform the MAGNETIC CHIP
DETECTOR 25-HOUR INSPECTION
procedure. For LJ-692 thru LJ-1062 and LW191 and After, or prior serials With Kit 1009013-1 installed, perform the MAGNETIC
CHIP DETECTOR INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. For LJ-692 thru LJ-1062, LW-191
and After, or prior serials With Kit 100-9013-1
installed, perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
8.
9.
ENGINE-DRIVEN FUEL PUMP COUPLING
SHAFT - Inspect for fretting and/or corrosion when
replacing outlet filter.
P&W
COWLING - Remove entire cowling and inspect
skin, structure and attaching hardware for wear,
damage and corrosion.
71
10. OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
79
b.
Inspect drain plug for leakage, security and
safety wire.
79
11. AFT COWLING ACCESS DOOR LATCHES Check adjustment of latches.
12. FIRESEALS - Inspect for condition.
71
13. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage
and corrosion.
78
b.
Inspect the exhaust system and visible
portions of the power turbine for burning,
distortion, damage and cracks.
P&W
14. ENGINE and PROPELLER CONTROLS
a.
b.
Check controls and associated equipment for
binding, stiff operation, full travel and friction
lock.
Inspect controls, bolts, nuts, cotter pins and
safeties for corrosion, damage and
attachment.
NOTE:
Special attention should be made to the
cambox.
c.
76
76
Inspect control cables for damage such as
crimps, cuts, abrasions or tight bends. If
exterior covering is ruptured, perform leak test.
76
15. CONTROL CABLE BOOTS - Inspect the control
cable boots for excessive compression, twist, wear
or aging which could cause binding.
76
16. STARTER-GENERATOR - Inspect one set of
brushes for indications of excessive wear or
damage (determine wear by observing diagonal
groove on brush).
24-30-05, 601
17. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's
manual.
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P&W
Page 16 of 24
Print Date: Thu Jan 11 11:03:38 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
b.
Inspect engine in accordance with the
instructions found in the engine manufacturer's
manual.
P&W
18. IGNITION SYSTEM
a.
b.
IGNITION GLOW PLUGS (LJ-1 thru LJ-922
and LW-1 thru LW-388 Without Kit 100-90141 installed) - Inspect glow plugs.
P&W
IGNITION REGULATOR BOX (LJ-1 thru LJ922 and LW-1 thru LW-388 Without Kit 1009014-1 installed)
P&W
1.
Inspect regulator box and electrical
harness for damage and security of
attachment.
P&W
Inspect that supply cable and ignition
cable connectors are installed and safety
wired.
P&W
SPARK IGNITER PLUGS (LJ-1 thru LJ-922,
LW-1 thru LW-388 With Kit 100-9014-1; LJ923 and After; LW-339 and After) - Inspect the
igniter plugs as described in the engine
maintenance manual.
P&W
IGNITION EXCITER (LJ-1 thru LJ-922, LW-1
thru LW-388 With Kit 100-9014-1; LJ-923 and
After; LW-339 and After)
P&W
1.
Inspect exciter and electrical harness for
damage and security of attachment.
P&W
2.
Inspect that supply cable and ignition
cable connectors are installed and safety
wired.
P&W
2.
c.
d.
19. FUEL RECOVERY SYSTEM
a.
FUEL DRAIN COLLECTOR SYSTEM (LJ-1
thru LJ-641 With Kit 100-9008-1S; LW-1 thru
LW-123 With Kit 100-9008-3S; LJ-642 thru
LJ-900; LW-124 thru LW-333).
1.
Check tank, pump, pump filter and
plumbing for leaks and security of
attachment.
71
2.
Perform a leak check on the collector
tank.
71
3.
Check wiring to pump and tank float
switch for damage and security of
attachment.
71
Check pump for proper operation.
71
4.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
b.
FUEL PURGE (LJ-901 thru LJ-1062; LW-334
and After)
71
1.
Remove fuel purge system air tank and
inspect. Clean as required.
71
2.
Remove fuel purge tank filter and inspect
for corrosion. Clean as required.
71
20. ENVIRONMENTAL BLEED AIR FLOW CONTROL
UNIT (LJ-502 thru LJ-1062, LW-1 and After) Inspect valve and associated equipment, electrical
wiring and ducts for damage, security of
connections and attachment.
21
21. INDUCTION SYSTEM and COMPRESSOR INLET
- Inspect the air inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet
screen and inspect the compressor inlet area,
struts, first stage blades and vanes for dirt deposits,
corrosion, erosion, cracks and damage by foreign
objects.
P&W
22. HIGH PRESSURE FUEL PUMP FILTERS - Inspect
the engine-driven high pressure fuel pump filters.
P&W
23. ENGINE TRUSS MOUNT ASSEMBLY
a.
Inspect for cracks, dents, chafing and
corrosion. Special attention should be made
to areas around clamps.
71
Inspect vibration isolators (mounts) for
deterioration, damage and attachment.
71
24. ENGINE FIRE DETECTION SYSTEM (If installed) Check all fire detectors for sensitivity and continuity.
26
25. AUTOFEATHER and AUTOIGNITION PRESSURE
SWITCHES - (If Installed) Inspect security of
attachment, leakage and electrical connection for
security.
61
74
26. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of
electrical connectors and wiring.
61
27. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical
connectors and wiring.
61
28. SUPERCHARGER GEARBOX (LJ-1 thru LJ-501) Check gearbox for leaks and fill gearbox as
required.
12
29. SUPERCHARGER HYDRAULIC PUMP (LJ-1 thru
LJ-113 except LJ-76) - Check for leaks and general
condition.
21
b.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
30. SUPERCHARGER HYDRAULIC RESERVOIR (LJ1 thru LJ-113 except LJ-76)
P.
12-10-04, 301
a.
Check fluid level.
b.
After airplane has stood idle for 4 to 5 hours,
check system for leakage by loosening the
cap on the reservoir; trapped air indicates the
system is free of leakage.
21
31. OIL PRESSURE SNUBBER (P/N 3R1) with
porous-type element (LJ-572 thru LJ-752; LW-39
thru LW-262) - Clean element.
12
Landing Gear Retraction
ATA REFERENCE
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly cycle
the landing gear, use only an external power source
capable of delivering and maintaining 28.25 ± 0.25 volts
throughout the extension and retraction cycles when
performing the landing gear retraction inspection.
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction system
for proper operation of all components through at
least two complete cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and
rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
5.
WARNING HORN - Check for proper operation.
32
6.
MAIN GEAR DOWNLOCKS - Check locking
mechanism for positive engagement in extended
position.
32
SAFETY SWITCH - Check for security and proper
operation.
32
7.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
8.
ACTUATORS - Check for noise, binding and
proper rigging.
9.
LIMIT SWITCHES
32
a.
Check for correct adjustment.
32
b.
Check for security of attachment.
32
10. EMERGENCY EXTENSION - Check system for
freedom of operation and positive engagement of
downlocks.
CAUTION:
Do not continue operation after receiving a
gear-down indication on all gears. Further
movement of the handle could damage the
drive mechanism and prevent subsequent
electrical gear retraction. The landing gear
cannot be retracted manually.
Q.
32
11. NOSE GEAR RETRACT CHAIN (Exterior only) Check nose gear and nose gear linkage clearance
from electrical wires and obstructions.
32
12. PLACARDS - Check that all placards are in place
and are legible.
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to
be applied during start and run of the engine. Refer to
the King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual for the engine start
and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for
proper operation.
2.
CROSSFEED VALVE - Check for proper
operation.
3.
BOOST PUMPS - Check for proper operation.
4.
AUXILIARY FUEL TRANSFER JET PUMPS (LW1 and After) - Check for proper operation.
5.
STARTER-GENERATOR
6.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
7.
ENGINE OIL - Check for proper pressure and
temperature limits.
8.
FUEL QUANTITY GAGES - Check for proper
operation.
9.
INTERSTAGE TURBINE TEMPERATURE / INLET
TEMPERATURE - Check for correct limits on
engine start.
10. VACUUM SYSTEM - Check for correct limits.
11. PNEUMATIC PRESSURE GAGE - Check for
correct pressure.
12. GYRO INSTRUMENTS - Check for erratic or noisy
operation.
13. PROPELLERS
a.
Perform low pitch torque check.
76
b.
Perform secondary low pitch stop check. (If
installed)
76
14. AUTOFEATHERING CHECK (If Installed) - Refer
to AUTOFEATHER OPERATIONAL CHECK.
61-23-00, 601
15. PROPELLER SYNCHRONIZER /
SYNCHROPHASER - Refer to FUNCTIONAL
TEST and confirm proper synchronization.
61
16. PROPELLER GOVERNOR - Check governor
operation (including feathering and reversing).
17. IDLE RPM - Check for correct rpm (both high and
low rpm).
18. AC INVERTERS - Check for proper operation.
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper
operation and cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for proper
operation and cycling.
22. ELECTRICAL SYSTEM - Perform functional
checks.
24
23. ENVIRONMENTAL SYSTEM - Check for proper
operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
24. AUTOPILOT - Check for proper operation as
outlined in the applicable King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane
Flight Manual Supplement.
25. STALL WARNING - Check for proper operation.
26. ENGINE FIRE DETECTORS (If Installed) - Perform
system test according to instructions found in the
King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) Perform system test according to instructions
found in the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual.
28. PRESSURIZATION SYSTEM - Check for proper
operation.
NOTE:
Refer to the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual and perform system test.
29. CONDITION LEVER - Check for clean shutdown
atIDLE-CUT-OFF.
30. PITOT TUBE - Check for proper heating at the unit
and for obstructions.
31. LANDING and TAXI LIGHTS - Check for proper
operation.
32. OUTBOARD WING LIGHTS (Right and Left) Check proper operation of all navigation and
strobe (if installed) lights.
33. COCKPIT LIGHTS - Check for proper operation.
34. EFIS COOLING BLOWERS (If installed) - Check
for proper operation.
35. ELECTRIC ELEVATOR TRIM - Check for proper
operation.
36. ENGINE and PROPELLER CONTROLS - Check
for freedom of movement, full travel and frictionlock operation.
37. STATIC SYSTEM - Inspect alternate air valve for
operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational check.
39. THRESHOLD LIGHT - Check for proper operation.
40. CABIN and COMPARTMENT LIGHTS - Check for
proper operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
41. PILOT'S and COPILOT'S SEATS and SEAT
BELTS - Check seat adjustment mechanism and
shoulder harness inertia reel for operation.
42. CABIN SEATS and SEAT BELTS - Check seat
adjustment mechanism and shoulder harness
inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps (If installed) do not
fold too soon and that they fold properly
without interference.
b.
Check CABIN DOOR / CABIN DOOR OPEN
annunciator for proper operation.
c.
Inspect cabin door damper (If installed) for
leakage and proper operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and latch
mechanism for proper operation.
52
b.
Check that latches open and close freely.
52
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for
smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS Check for proper operation.
47. AILERON (LH and RH) - Check for freedom of
movement.
48. AILERON TRIM TAB - Check trim tab actuator for
smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) Check the operation of the heated vents. They
should be warm to the touch.
50. STALL WARNING HEAT - Check for proper
operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH
and RH) - Check flaps for noisy or erratic
operation.
52. WING ICING LIGHTS - Check for proper operation.
53. EXTERNAL POWER RELAY - Check for proper
operation.
54. ENGINE INERTIAL ANTI-ICER - Check for proper
operation and rigging.
Copyright © Textron Aviation Inc.
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30
Page 23 of 24
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-02 (Rev D0)
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS Check for smoothness of operation. Make sure
movement is between inner and outer bushings.
R.
27
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as
required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or
FLIGHT TEST - Check for oil leaks, security and
attachment of all components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE
BULLETINS - Must be reviewed and complied with
as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
Make sure Special Inspection requirements
are complied with at the appropriate intervals.
05-21-05, 601
b.
Perform Continuous Corrosion Control
Inspection if required by the environmental
conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies noted
by the pilot must be checked and corrected as
required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check
for proper operation and make sure ELT is ARMED
before returning airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper
pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If
Installed) Make sure all necessary emergency and
survival equipment are installed in the airplane and
serviceable.
10. PLACARDS - Determine that all required placards
are in place and legible.
MECH
INSP
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books are
filled out properly.
2.
Inspection Completed
I certify that the Phase 2 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 3) - INSPECTION/CHECK
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Scheduled Inspection Program (Phase 3)
Owner:
W/O Number:
Date In:
Serial No. :
Date Out:
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure, 27-50-07,
501).
Nose Section
ATA REFERENCE
1.
B.
INSP
MECH
INSP
COMBUSTION HEATER (LJ-1 thru LJ-501)
a.
Check the gap and condition of the heater
spark plug.
21-40-07, 201
b.
Check fuel plumbing, pump and regulator
for leakage, damage and security of
attachment.
21
c.
Perform the HEATER FUEL FILTER
ELEMENT CLEANING procedure.
d.
On LJ-1 thru LJ-53 that have complied with
Service Letter 66-4, and on LJ-54 thru LJ501, check the fuel heater for operation,
condition and attachment.
21
e.
Inspect the heater drain lines for
obstructions.
21
f.
Perform the CABIN HEAT OUT WARNING
LIGHT FUNCTIONAL CHECK procedure.
21-40-01, 701
21-40-00, 601
Nose Avionics Compartment
NOTE:
C.
MECH
There are no inspections required in this section during this phase.
Nose Landing Gear Area
ATA REFERENCE
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Page 1 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
1.
D.
ELECTRICAL WIRING and EQUIPMENT Inspect all exposed electrical wiring and
equipment for chafing, damage and security of
attachment.
20-00-00, 601
Nose Gear
ATA REFERENCE
1.
2.
a.
Inspect wheel for wear, damage and
corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
32
CMM
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
INSP
12
CMM
12-20-15, 301
CMM
4.
NOSE GEAR BRACE STOP LUGS - Inspect for
cracks, damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect
steering stop for damage or distortion.
6.
LANDING and TAXI LIGHTS - Inspect for broken
lenses or bulbs on LJ-502 thru LJ-1062; LW-1
and After.
33
STEERING LINKAGE - Inspect nose gear
steering mechanism and attaching hardware for
wear, damage and corrosion.
32
32
NOSE GEAR RETRACT AND EXTENTION
CHAIN (Exterior and interior)
a.
E.
MECH
TIRE
SHIMMY DAMPER - Inspect for leaks, security
and attachment.
8.
INSP
WHEEL
3.
7.
MECH
Inspect chain for broken links, excessive pin
and link wear, misalignment, rust, corrosion
and dirt.
32
b.
Check sprockets for excessive wear and
hook-shaped teeth.
32
c.
Check chain for proper tension.
32
d.
Check nose gear and nose gear linkage
clearance from electrical wires and
obstructions.
32
Flight Compartment
ATA REFERENCE
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
1.
2.
WINDSHIELD
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal (Silicone)
for debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal
(Polysulfide) for debonding, cracks or wear.
56
d.
Inspect windshield attachment screws for
20 inch-pounds of torque.
56
WINDOWS
a.
b.
c.
Inspect exterior surface of cockpit side
windows for scratches, cracks, chips,
excess crazing or any indication of
delamination.
56
Inspect for any contact of the milled edge of
the window with the airframe skin. Correct
window contact by reinstalling and
recentering the window in the airframe
opening.
56
Inspect for any damage from paint
strippers, solvents or any unapproved
sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all
moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for damage
and wear.
25
5.
PORTABLE FIRE EXTINGUISHER - Inspect the
bottle for signs of damage and mount for security
of attachment.
26
CMM
6.
SEATS, SEAT BELTS and SHOULDER
HARNESSES - Inspect seat belts and shoulder
harnesses for deterioration or missing
components.
25
7.
BRAKE FLUID RESERVOIR PRESSURE
EQUALIZATION ORIFICE - Clean and flush
orifice of contaminants.
FLIGHT CONTROL CABLE TENSION - Inspect
and record aileron cable tension:
TEMPERATURE:________ °F
CONTROL COLUMN INTERCONNECT CABLE
TENSION: _______
1/8 IN. AILERON CABLE TENSION:
LEFT __________RIGHT_________
32-40-03, 701
8.
Copyright © Textron Aviation Inc.
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27
Page 3 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
9.
HEATING SYSTEM
a.
Check all ducts for damage and
deterioration.
b.
Check bleed air ducts (LJ-502 thru LJ1062; LW-1 and After) for damage,
insulation and adequate clearance of
electrical wiring and control cables.
CAUTION:
Prior to installing pilot's compartment
floor panels, visually inspect the entire
length of the elevator control cable in
this area to assure adequate clearance
between the cable and electrical wiring,
bleed air ducts, bleed air duct clamps,
and structural components to prevent
chaffing and wear.
10. FLIGHT COMPARTMENT AREA - Inspect skin,
structure, seats and attaching hardware for wear,
damage and corrosion. If damage or corrosion is
found in a given area, check the adjacent area.
21
21
20-00-00, 601
11. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, proper routing of
wire bundles and security of attachment.
CAUTION:
Prior to installing pilot's compartment floor
panels, visually inspect the entire length of
the elevator control cable in this area to
make sure that there is adequate clearance
between the cable and electrical wiring,
bleed air ducts, bleed air duct clamps, and
structural components to prevent chaffing
and wear.
20-00-00, 601
12. RUDDER PEDALS
a.
Inspect rudder pedals for wear, clearance
and attachment.
27
b.
Inspect rudder pedal linkage for wear,
damage, attachment and operation.
27
13. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
a.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are conditions
for replacements.
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27
20-04-00, 201
Page 4 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
b.
c.
Inspect control system cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables that
have more than three broken wires in any
given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
On LJ-502 thru LJ-1062 and LW-1 thru LW347, visually inspect the rudder, elevator
and trim control cables between FS 116.00
and FS 147.60. Check for chafing, fraying,
broken strands and adequate clearance.
Pay particular attention to the clearance
where the cable passes the bleed air duct
and any adjacent electrical wiring or
components.
CAUTION:
The travel of the elevator cable in this
area is not sufficient to expose the
cable for a thorough inspection without
removal of the pilot's seat, floorboards,
reverse current relay and/or the
generator line contactor panel. Upon
installation of removed components,
inspect all adjacent electrical wiring and
components for adequate clearance
with control cables.
27
20-04-00, 201
14. BRAKE SYSTEM - Inspect brake system
components and plumbing for leakage and
attachment.
32
15. INSTRUMENT PANEL, PLUMBING and WIRING
- Inspect instrument panel, subpanels, placards,
shock mounts and instrument plumbing for
damage, attachment, chafing and hoses for
hardness or cracks.
31
16. CONTROL COLUMN BEARING INSPECTION
27-10-05, 601
a.
Inspect for wear, damage, corrosion,
attachment and operation.
27
b.
Inspect control wheel adapter for cracks in
the weld area of adapter on forward side of
the control wheel.
27
c.
Inspect control wheel switches for condition
and security of attachment.
27
d.
Perform the CONTROL COLUMN
BEARING SUPPORT INSPECTION
procedure.
27-10-05, 601
17. PEDESTAL
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
a.
b.
Inspect pedestal components and plumbing
for damage, attachment, chaffing and hoses
for hardness or cracks.
31
Perform the CONDITION CONTROL
CATCH GATE INSPECTION procedure.
76-17-03, 601
18. PRESSURIZATION CONTROLLER
a.
b.
Inspect for security of attachment, plumbing
and wiring for damage and connection
security.
21
Inspect filter in controller assembly located
within the pedestal.
21
19. ACCESS DOORS - Inspect for fit and
attachment.
20. HEATED WINDSHIELD - Inspect windshield
antistatic coating and tab bonding.
06-50-00, 001
56
21. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for
corrosion.
b.
Inspect relief tube outlet area for corrosion.
22. ELECTRICAL LOAD DISTRIBUTION - Perform
inspections of the DUAL BUS FEEDER and
FUEL PANEL DIODES.
24-51-00, 601
23. EMERGENCY LANDING GEAR EXTENSION Inspect the emergency extension handle
assembly and linkage from the handle to the
emergency extension pump for proper
installation, wear and security of attachment.
32
24. ENVIRONMENTAL SYSTEM
a.
Inspect ducts for condition and security of
installation.
21
b.
Check ducts for evidence of thermal leaks
and/or degradation, such as discoloration
of duct insulator, adjacent structure or
components.
21
Physically inspect ducts by touching ducts,
checking for thermal deterioration,
deformation of the ducts, and proper
connection at the joints.
21
d.
Perform the BLEED AIR BYPASS VALVE
OPERATIONAL CHECK procedure.
21-41-07, 601
e.
Perform the FUNCTIONAL TEST OF THE
DUCT SENSE ELEMENT procedure.
21-61-00, 501
c.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
f.
F.
Perform the FUNCTIONAL TEST OF THE
CABIN TEMPERATURE CONTROL
SYSTEM procedure.
21-61-00, 501
Cabin Section
ATA REFERENCE
1.
WINDOWS - Inspect exterior surface of
windows for deep scratches, cracks, chips
and excessive crazing or other damage.
56
2.
ROTATING or FLASHING BEACON Inspect for cracked or broken lenses.
33
3.
ACCESS DOORS - Inspect for fit and
attachment.
06-50-00, 001
4.
OUTFLOW and SAFETY VALVES
a.
Drain outflow valve control line.
21
b.
Inspect plumbing and components for
attachment.
21
c.
Clean and inspect safety valve screen.
Perform the SAFETY VALVE FILTER
CLEANING procedure.
12-20-21, 701
Clean and inspect poppet and seat of
both valves. Perform the appropriate
OUTFLOW AND SAFETY VALVE
CLEANING procedure.
12-20-21, 701
Perform functional test of outflow and
safety valves.
21
5.
SEAT TRACKS - Inspect seat tracks for
damage and wear.
25
6.
SEAT BELTS and SHOULDER
HARNESSES
d.
e.
a.
b.
7.
Inspect seats and shoulder harnesses
for deterioration or missing
components.
25-20-01, 601
Inspect shoulder harness attachment
posts for cracked, worn, brittle or
missing grommet (If Installed).
25-20-01, 601
MECH
INSP
OXYGEN SYSTEM
a.
Test all outlets and masks for oxygen
flow.
35
b.
Inspect oxygen system installation for
damage and security of attachment.
35
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Page 7 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
8.
TOILET (If Installed) - Inspect for spillage and
leakage below the toilet.
9.
CABIN ENTRANCE DOOR
38
a.
Inspect the door seal for cuts, abrasions
and security of attachment.
52
b.
Inspect the cabin door support cables
for wear, damage and security.
52
c.
Inspect door latching mechanism and
cables for damage, deterioration and
security of attachment.
52
Inspect upper latch hooks and retaining
pins for rigging, wear and damage.
Replace pin at 10% diameter wear.
(Pin removal required).
52
53
e.
Inspect upper latch hooks for proper
tension.
52
f.
Inspect side latch bolts (bayonets) and
rollers for rigging and freedom of
movement.
52
On LJ-1 thru LJ-1011, except LJ-986
and LJ-996, inspect the forward and aft
frame for cracks in area of bayonet
roller attach screws. If cracks are found,
inspect adjacent structure for damage.
52
53
Inspect the CABIN DOOR / CABIN
DOOR OPEN annunciator switch
spring.
52
d.
g.
h.
10. PORTABLE FIRE EXTINGUISHER - Inspect
bottle for damage and security of attachment.
26-21-00, 001
CMM
11. AVIONICS EQUIPMENT and RACKS (If
Installed) - Inspect avionics equipment and
racks for security of attachment.
53
12. BULKHEADS - Inspect for water traps.
53
13. FLIGHT CONTROL COMPONENTS,
CABLES and PULLEYS
a.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for
bulges, splits, bends or cracks which
are conditions for replacements.
Copyright © Textron Aviation Inc.
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27
20-04-00, 201
Page 8 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
b.
Inspect control system cables, pulleys
and associated equipment for wear,
cracks, breaks, attachment, alignment,
clearance and proper operation.
Replace cables that have more than
three broken wires in any given threefoot cable length or have evidence of
corrosion.
27
20-04-00, 201
14. LANDING GEAR BRAKE LINES - Inspect for
leaks, damage and security of attachment.
32
15. FLAP MOTOR and DRIVES - Inspect for
damage and attachment.
27
16. BELLY DRAIN VALVES - Inspect for
possible obstructions.
53
17. CABIN WINDOW ATTACH FRAMES Perform inspection and check for looseness
of window attach frames.
56
18. PNEUMATIC PRESSURE REGULATOR,
VACUUM EJECTOR and DEICER
DISTRIBUTION VALVE - Inspect equipment
and plumbing for security.
21
19. CONTROL CABLE SEALS - Inspect for
damage, security, cleanliness and
lubrication.
27
20. AUTOPILOT COMPONENTS - Inspect
components for security of attachment.
22
21. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for
corrosion.
38
20-09-00, 201
b.
Inspect relief tube outlet area for
corrosion.
38
20-09-00, 201
22. ANTENNAS - Inspect all external antennas
for leading edge erosion and condition of
base seals.
23
23. CABIN DOORS and EMERGENCY EXITS
a.
b.
Inspect skin, structure and attaching
hardware for wear, damage and
corrosion. If damage or corrosion is
found in a given area, check the
adjacent area.
20-00-00, 601
Inspect corner areas of emergency exit
(removed) for cracks and abrasion in
area of curvature between seal and
outer face of exit.
52
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Page 9 of 26
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
24. EMERGENCY EXITS
a.
Inspect latches for damage and check
all moving parts for proper operation.
52
b.
Check for proper latch adjustment and
seal of closed door.
52
25. ELECTRICAL WIRING and EQUIPMENT Inspect all exposed electrical wiring and
equipment for chafing, damage and security
of attachment.
20-00-00, 601
26. ENVIRONMENTAL SYSTEM
a.
Inspect ducts for condition and security
of installation.
21
b.
Check ducts for evidence of thermal
leaks and/or degradation, such as
discoloration of duct insulator, adjacent
structure or components.
21
Physically inspect ducts by touching
ducts, checking for thermal
deterioration, deformation of the ducts,
and proper connection at the joints.
21
c.
27. FLUORESCENT LIGHT POWER
SUPPLIES - (LJ-654, LJ-674 thru LJ-979,
LW-134, LW-157 thru LW-347) - Inspect the
edge card connector and power supply for
contamination and corrosion. Make sure the
edge card is clean and the plug that slips
over the edge card is tight.
28. CABIN SECTION AREA - Inspect skin,
structure, seats and attaching hardware for
wear, damage and corrosion. If damage or
corrosion is found in a given area, check the
adjacent area.
G.
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and
inspect.
2.
ELT BATTERY
3.
Inspect for leakage, corrosion or loose
connections.
25
b.
Determine remaining useful life.
25
NAVIGATION LIGHTS and ROTATING
(Flashing) BEACONS - Inspect for broken
or cracked lenses.
33
Retain printed data for historical reference only. For future maintenance, use only current data.
INSP
53
a.
Copyright © Textron Aviation Inc.
MECH
Page 10 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
4.
ACCESS DOORS - Inspect for fit and
security of attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the
drain holes in the bottom of the ventral fin for
obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration,
damage and attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES Inspect the drain holes for obstructions.
27
8.
STATIC WICKS
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the
airplane.
20
9.
FLIGHT CONTROL CABLE TENSION Inspect and record elevator, elevator tab,
rudder and rudder tab cable tension:
TEMPERATURE: °F
ELEVATOR CABLE TENSION: UP ___ DOWN___
ELEVATOR TAB CABLE TENSION:
RUDDER CABLE TENSION: LEFT ____ RIGHT___
RUDDER TAB CABLE TENSION:
H.
27
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points
of attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in
the wing center section and outboard wing
upper attachment fittings.
SIRM
3.
INSP
LIGHTS
a.
4.
MECH
Inspect the navigation and recognition
(if installed) lights for broken or cracked
lenses.
33
b.
Inspect the strobe light for broken or
cracked lenses, if installed.
33
c.
Inspect the landing lights for broken or
cracked lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
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28
Page 11 of 26
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
b.
c.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
5.
INTERGRAL FUEL TANK (LW-1 and After) Inspect the exterior surface of the intergral
tank access doors for leaks.
06-50-00, 001
28
6.
DEICER BOOTS - Inspect exterior surface
for deterioration, damage and attachment.
30
7.
ACCESS DOORS (Inspection Panels) Inspect for fit and attachment.
06-50-00, 001
8.
STATIC WICKS
9.
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the
airplane.
20
AILERON and TRIM TAB - Perform the
CHECKING AILERON TAB FREE PLAY
procedure.
27-10-15, 601
10. FLIGHT CONTROL CABLE TENSION Inspect and record aileron and aileron tab
cable tension:
TEMPERATURE:_____ °F
3/16" AILERON CABLE TENSION: LEFT_______
AILERON TAB CABLE TENSION: _______
I.
27
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points
of attachment.
2.
FUEL TANKS and VENTS
3.
Inspect the exterior of the center
section for leaks.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing for flexibility, splits, cracks, or
distortion.
28
Inspect the exterior openings of the
vents for obstructions.
28
ACCESS DOORS (Inspection Panels) Inspect for fit and attachment.
Copyright © Textron Aviation Inc.
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INSP
28
a.
c.
MECH
06-50-00, 001
Page 12 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
4.
FUEL PUMPS - Inspect the pumps for leaks
and security of attachment.
28
5.
SUPERCHARGER MOTOR - (LJ-1 thru LJ113 except LJ-76) - Inspect for leaks and
general condition.
21
FLOW CONTROL VALVE - (LJ-1 thru LJ501) - Inspect valve and associated
equipment ducts for damage, deterioration
and attachment.
21
MECHANICAL LANDING GEAR TORQUE
TUBE AND ASSOCIATED COMPONENTS
- Inspect torque tube, bearings, supports,
universal joints, and hardware for security of
attachment, wear, cracks, breaks, bends,
splits, chaffing, alignment, and clearance
from associated structures and their
components. Disconnect the torque tubes at
both ends and rotate check bearing for wear
or roughness.
32
6.
7.
J.
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
INSP
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
b.
Inspect wheel bearings and races for
wear, pitting, cracks, discoloration, rust
or other indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion
and security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration
and correct inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT
- Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT Inspect exposed wiring and equipment for
chafing, damage and proper routing and
security of attachment.
20-00-00, 601
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for
visible damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
c.
7.
8.
K.
Inspect actuators for leakage of internal
lubricant.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive
wear.
CMM
b.
Inspect for security of attach fittings.
32
c.
Inspect downlock bolts for proper torque
(finger-tight and safety-wired).
CMM
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect
wheel well and gear door structure, all
components and attaching hardware for
wear, damage and corrosion. If damage or
corrosion is found, check the adjacent area.
32
Left-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller
deice system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect
the firewall filter for evidence of foreign
matter, corrosion or microbiological growth
in the fuel system. If any microbiological
growth is found, use BIOBOR JF or Kathon
FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment(spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal
particles.
P&W
5.
SUPERCHARGER GEARBOX (LJ-1 thru
LJ-501) - Check the gearbox for leaks and
fill gearbox as required.
12
SUPERCHARGER HYDRAULIC PUMP
(LJ-1 thru LJ-113 except LJ-76) - Check for
leaks and general condition.
21
6.
7.
MECH
INSP
SUPERCHARGER HYDRAULIC
RESERVOIR (LJ-1 thru LJ-113 except LJ76)
a.
Check fluid level.
b.
After airplane has stood idle for 4 to 5
hours, check system for leakage by
loosening the cap on the reservoir;
trapped air indicates the system is free
of leakage.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
12-10-04, 301
21
Page 14 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
8.
INERTIAL ENGINE ANTI-ICER
a.
Check vane(s) for freedom of
movement and correct travel.
Lubrication of linkage and vane hinges
may be necessary.
12
30
On LJ-76, LJ-114 thru LJ-241, inspect
plumbing, valve, actuator and limit
switches for damage, leakage,
operation and security of attachment.
30
c.
On LJ-125, LJ-170 thru LJ-241 and
airplanes With Kit 90-4015 installed,
replace or bake dryer cartridge.
12-20-05, 301
30
d.
On LJ-242 thru LJ-1062, LW-1 and
After and airplanes With Kit 90-9017
installed, check the push-pull control for
damage, security of attachment,
freedom of movement and full travel.
12
30
b.
9.
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of
attachment.
26
b.
Check fire bottle pressure gage.
26
10. MAGNETIC CHIP DETECTOR (If Installed)
a.
b.
L.
Remove and visually inspect plug for
metal particles and damage. For LJ-1
thru LJ-672 and LW-1 thru LW-154
With Kits 100-9011-1 or -3 installed,
LJ-637 thru LJ-691, LW-155 thru LW190, perform the MAGNETIC CHIP
DETECTOR 25-HOUR INSPECTION
procedure. For LJ-692 thru LJ-1062
and LW-191 and After, or prior serials
With Kit 100-9013-1 installed, perform
the MAGNETIC CHIP DETECTOR
INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for
proper operation. For LJ-692 thru LJ1062, LW-191 and After, or prior
serials With Kit 100-9013-1 installed,
perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
Right-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points
of attachment.
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MECH
INSP
28
Page 15 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
2.
3.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in
the wing center section and outboard wing
upper attachment fittings.
LIGHTS
a.
4.
SIRM
Inspect the navigation and recognition
(if installed) lights for broken or
cracked lenses.
33
b.
Inspect the strobe light for broken or
cracked lenses, if installed.
33
c.
Inspect the landing lights for broken or
cracked lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for
leaks.
28
5.
INTERGRAL FUEL TANK (LW-1 and After)
- Inspect the exterior surface of the intergral
tank access doors for leaks.
06-50-00, 001
28
6.
DEICER BOOTS - Inspect exterior surface
for deterioration, damage and attachment.
30
7.
ACCESS DOORS (Inspection Panels) Inspect for fit and attachment.
06-50-00, 001
8.
STATIC WICKS
c.
9.
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the
airplane.
20
Step deleted.
10. FLIGHT CONTROL CABLE TENSION Inspect and record aileron and aileron tab
cable tension:
TEMPERATURE:________ °F
3/16" AILERON CABLE TENSION:
RIGHT_______________
27
M. Right-Hand Wing Center Section
ATA REFERENCE
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MECH
INSP
Page 16 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
1.
FUEL PROBES - Inspect for leaks at points
of attachment.
2.
FUEL TANKS and VENTS
a.
Inspect the exterior of the center
section for leaks.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing for flexibility, splits, cracks, or
distortion.
28
Inspect the exterior openings of the
vents for obstructions.
28
c.
N.
28
3.
ACCESS DOORS (Inspection Panels) Inspect for fit and attachment.
4.
BATTERY
06-50-00, 001
a.
Service as required.
12
b.
Remove battery and inspect the battery
box, cables and vent tubes for
deterioration or obstructions.
24
5.
FUEL PUMPS - Inspect the pumps for leaks
and security of attachment.
28
6.
MECHANICAL LANDING GEAR TORQUE
TUBE AND ASSOCIATED COMPONENTS
- Inspect torque tube, bearings, supports,
universal joints, and hardware for security of
attachment, wear, cracks, breaks, bends,
splits, chaffing, alignment, and clearance
from associated structures and their
components. Disconnect the torque tubes at
both ends and rotate check bearing for wear
or roughness.
32
Right-Hand Main Landing Gear Area
ATA REFERENCE
1.
MECH
INSP
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for
wear, pitting, cracks, discoloration, rust
or other indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion
and security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration
and correct inflation.
12-20-15, 301
CMM
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Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
4.
5.
6.
7.
8.
O.
RIGHT-HAND MAIN LANDING GEAR
STRUT - Check strut for leaks and proper
extension.
12-20-33, 301
ELECTRICAL WIRING and EQUIPMENT Inspect exposed wiring and equipment for
chafing, damage and proper routing and
security of attachment.
20-00-00, 601
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for
visible damage and wear.
32
b.
Inspect brackets for cracks and loose
or missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive
wear.
CMM
b.
Inspect for security of attach fittings.
32
c.
Inspect downlock bolts for proper
torque (finger-tight and safety-wired).
CMM
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect
wheel well and gear door structure, all
components and attaching hardware for
wear, damage and corrosion. If damage or
corrosion is found, check the adjacent area.
32
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller
deice system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect
the firewall filter for evidence of foreign
matter, corrosion or microbiological growth
in the fuel system. If any microbiological
growth is found, use BIOBOR JF or Kathon
FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment(spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal
particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
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MECH
INSP
Page 18 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
6.
7.
a.
Check vane(s) for freedom of
movement and correct travel.
Lubrication of linkage and vane hinges
may be necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect
plumbing, valve, actuator and limit
switches for damage, leakage,
operation and security of attachment.
30
c.
On LJ-125, LJ-170 thru LJ-241 and
airplanes With Kit 90-4015 installed,
replace or bake dryer cartridge.
12-20-05, 301
30
d.
On LJ-242 thru LJ-1062, LW-1 and
After and airplanes With Kit 90-9017
installed, check the push-pull control for
damage, security of attachment,
freedom of movement and full travel.
12
30
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of
attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
a.
b.
P.
Remove and visually inspect plug for
metal particles and damage. For LJ-1
thru LJ-672 and LW-1 thru LW-154
With Kits 100-9011-1 or -3 installed,
LJ-637 thru LJ-691, LW-155 thru LW190, perform the MAGNETIC CHIP
DETECTOR 25-HOUR INSPECTION
procedure. For LJ-692 thru LJ-1062
and LW-191 and After, or prior serials
With Kit 100-9013-1 installed, perform
the MAGNETIC CHIP DETECTOR
INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for
proper operation. For LJ-692 thru LJ1062, LW-191 and After, or prior
serials With Kit 100-9013-1 installed,
perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
Landing Gear Retraction
ATA REFERENCE
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MECH
INSP
Page 19 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
NOTE:
Since battery voltage is not sufficient to properly
cycle the landing gear, use only an external power
source capable of delivering and maintaining
28.25 ± 0.25 volts throughout the extension and
retraction cycles when performing the landing
gear retraction inspection.
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction
system for proper operation of all
components through at least two complete
cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and
fit.
32
b.
Check door linkage for wear, damage
and rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper
operation of switches.
32
b.
Check wiring for damage and security
of connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper
operation of switches.
32
b.
Check wiring for damage and security
of connection.
32
5.
WARNING HORN - Check for proper
operation.
32
6.
MAIN GEAR DOWNLOCKS - Check
locking mechanism for positive engagement
in extended position.
32
7.
SAFETY SWITCH - Check for security and
proper operation.
32
8.
ACTUATORS - Check for noise, binding
and proper rigging.
32
9.
LIMIT SWITCHES
a.
Check for correct adjustment.
32
b.
Check for security of attachment.
32
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Page 20 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
10. EMERGENCY EXTENSION - Check
system for freedom of operation and
positive engagement of downlocks.
CAUTION:
Do not continue operation after
receiving a gear-down indication on all
gears. Further movement of the handle
could damage the drive mechanism and
prevent subsequent electrical gear
retraction. The landing gear cannot be
retracted manually.
Q.
32
11. NOSE GEAR RETRACT CHAIN (Exterior
only) - Check nose gear and nose gear
linkage clearance from electrical wires and
obstructions.
32
12. PLACARDS - Check that all placards are in
place and are legible.
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures
are to be applied during start and run of the
engine. Refer to the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual for the engine start and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check
for proper operation.
2.
CROSSFEED VALVE - Check for proper
operation.
3.
BOOST PUMPS - Check for proper
operation.
4.
AUXILIARY FUEL TRANSFER JET
PUMPS (LW-1 and After) - Check for
proper operation.
5.
STARTER-GENERATOR
6.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light
illumination.
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Page 21 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
7.
ENGINE OIL - Check for proper pressure
and temperature limits.
8.
FUEL QUANTITY GAGES - Check for
proper operation.
9.
INTERSTAGE TURBINE TEMPERATURE /
INLET TEMPERATURE - Check for correct
limits on engine start.
10. VACUUM SYSTEM - Check for correct
limits.
11. PNEUMATIC PRESSURE GAGE - Check
for correct pressure.
12. GYRO INSTRUMENTS - Check for erratic
or noisy operation.
13. PROPELLERS
a.
Perform low pitch torque check.
76
b.
Perform secondary low pitch stop
check. (If installed)
76
14. AUTOFEATHERING CHECK (If Installed) Refer to AUTOFEATHER OPERATIONAL
CHECK.
61-23-00, 601
15. PROPELLER SYNCHRONIZER /
SYNCHROPHASER - Refer to
FUNCTIONAL TEST and confirm proper
synchronization.
61
16. PROPELLER GOVERNOR - Check
governor operation (including feathering
and reversing).
17. IDLE RPM - Check for correct rpm (both
high and low rpm).
18. AC INVERTERS - Check for proper
operation.
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel
illumination.
20. PROPELLER DEICER - Check for proper
operation and cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for
proper operation and cycling.
22. ELECTRICAL SYSTEM - Perform
functional checks.
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24
Page 22 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
23. ENVIRONMENTAL SYSTEM - Check for
proper operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation
as outlined in the applicable King Air 90
Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual
Supplement.
25. STALL WARNING - Check for proper
operation.
26. ENGINE FIRE DETECTORS (If Installed) Perform system test according to
instructions found in the King Air 90 Pilot's
Operating Handbook and FAA Approved
Airplane Flight Manual.
27. ENGINE FIRE EXTINGUISHERS (If
Installed) - Perform system test according
to instructions found in the King Air 90
Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual.
28. PRESSURIZATION SYSTEM - Check for
proper operation.
NOTE:
Refer to the King Air 90 Pilot's
Operating Handbook and FAA
Approved Airplane Flight Manual and
perform system test.
29. CONDITION LEVER - Check for clean
shutdown atIDLE-CUT-OFF.
30. PITOT TUBE - Check for proper heating at
the unit and for obstructions.
31. LANDING and TAXI LIGHTS - Check for
proper operation.
32. OUTBOARD WING LIGHTS (Right and
Left) - Check proper operation of all
navigation and strobe (if installed) lights.
33. COCKPIT LIGHTS - Check for proper
operation.
34. EFIS COOLING BLOWERS (If installed) Check for proper operation.
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Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
35. ELECTRIC ELEVATOR TRIM - Check for
proper operation.
36. ENGINE and PROPELLER CONTROLS Check for freedom of movement, full travel
and friction-lock operation.
37. STATIC SYSTEM - Inspect alternate air
valve for operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational
check.
39. THRESHOLD LIGHT - Check for proper
operation.
40. CABIN and COMPARTMENT LIGHTS Check for proper operation.
41. PILOT'S and COPILOT'S SEATS and
SEAT BELTS - Check seat adjustment
mechanism and shoulder harness inertia
reel for operation.
42. CABIN SEATS and SEAT BELTS - Check
seat adjustment mechanism and shoulder
harness inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps (If installed)
do not fold too soon and that they fold
properly without interference.
b.
Check CABIN DOOR / CABIN DOOR
OPEN annunciator for proper
operation.
c.
Inspect cabin door damper (If
installed) for leakage and proper
operation.
44. EMERGENCY EXIT
a.
Check emergency release handles
and latch mechanism for proper
operation.
b.
Check that latches open and close
freely.
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and
motors for smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE
LIGHTS - Check for proper operation.
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Page 24 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
47. AILERON (LH and RH) - Check for freedom
of movement.
48. AILERON TRIM TAB - Check trim tab
actuator for smoothness of operation and
attachment.
49. FUEL TANK HEATED VENTS (LH and
RH) - Check the operation of the heated
vents. They should be warm to the touch.
50. STALL WARNING HEAT - Check for
proper operation.
51. FLAPS and ACTUATORS (Inboard,
Outboard, LH and RH) - Check flaps for
noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper
operation.
53. EXTERNAL POWER RELAY - Check for
proper operation.
R.
54. ENGINE INERTIAL ANTI-ICER - Check for
proper operation and rigging.
30
55. ELEVATOR TRIM TAB ACTUATOR
BUSHINGS - Check for smoothness of
operation. Make sure movement is
between inner and outer bushings.
27
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as
required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND
RUN-UP or FLIGHT TEST - Check for oil
leaks, security and attachment of all
components.
4.
AIRWORTHINESS DIRECTIVES and
SERVICE BULLETINS - Must be reviewed
and complied with as required.
5.
ADDITIONAL INSPECTION
REQUIREMENTS
a.
b.
Make sure Special Inspection
requirements are complied with at the
appropriate intervals.
05-21-05, 601
Perform Continuous Corrosion Control
Inspection if required by the
environmental conditions encountered.
05-29-00, 601
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MECH
INSP
Page 25 of 26
Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-03 (Rev D0)
6.
IN-FLIGHT WORKSHEET - All
discrepancies noted by the pilot must be
checked and corrected as required.
7.
EMERGENCY LOCATOR TRANSMITTER
- Check for proper operation and make
sure ELT is ARMED before returning
airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check
for proper pressure.
12
9.
EMERGENCY and SURVIVAL
EQUIPMENT - (If Installed) Make sure all
necessary emergency and survival
equipment are installed in the airplane and
serviceable.
10. PLACARDS - Determine that all required
placards are in place and legible.
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log
books are filled out properly.
2.
Inspection Completed
I certify that the Phase 3 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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Print Date: Thu Jan 11 11:03:40 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 4) - INSPECTION/CHECK
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Scheduled Inspection Program (Phase 4)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07, 501).
Nose Section
ATA
REFERENCE
1.
2.
MECH
INSP
AIR-CONDITIONING COMPRESSOR
a.
Inspect for security of attachment and oil leaks.
21
b.
Inspect drive belt for deterioration, wear and proper
tension.
21
c.
Check for proper compressor oil level if oil leak
indications are present.
12
d.
Inspect the integrity and security of the clutch assembly.
Remove the belt from the compressor. Inspect for
freedom of rotation, bearing roughness and free play
(wobble). Check for corrosion or evidence of
inappropriate wear (belt dust, metal shavings). Install
belt on compressor.
21
COMBUSTION HEATER (LJ-1 thru LJ-501)
a.
Check the gap and condition of the heater spark plug.
21-40-07, 201
b.
Check fuel plumbing, pump and regulator for leakage,
damage and security of attachment.
21
c.
Perform the HEATER FUEL FILTER ELEMENT
CLEANING procedure.
d.
On LJ-1 thru LJ-53 that have complied with Service
Letter 66-4, and on LJ-54 thru LJ-501, check the fuel
heater for operation, condition and attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
21-40-01, 701
21
Page 1 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
3.
B.
21
e.
Inspect the heater drain lines for obstructions.
f.
Perform the CABIN HEAT OUT WARNING LIGHT
FUNCTIONAL CHECK procedure.
21-40-00, 601
NOSE SECTION AREA - Inspect skin, structure and
attaching hardware for wear, damage and corrosion. If
damage or corrosion is found in a given area, check the
adjacent area.
AC43.13-1B/2B
4.
RADOME - Inspect the exterior surface for cracks in the paint AC43.13-1B/2B
and fiberglass substrate.
5.
ELECTRIC HEATER (LJ-502 thru LJ-1062, LW-1 and After)
- Inspect the heater, heater elements, associated wiring and
ducting for condition and attachment.
21-41-00, 001
Nose Avionics Compartment
ATA
REFERENCE
C.
1.
VACUUM REGULATOR VALVE FILTER - Inspect for
blockage.
12
2.
INSTRUMENT AIR FILTER - Inspect for cleanliness.
12
3.
AVIONICS EQUIPMENT and RACKS - Inspect for security of
attachment.
4.
AVIONICS COMPARTMENT AREA - Inspect for corrosion,
trapped water and indications of water leakage.
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing, damage AC43.13-1B/2B
and security of attachment.
6.
DOORS, FASTENERS and SEAL - Inspect seal for
deterioration and doors and latches for proper adjustment
and fit.
INSP
MECH
INSP
52
Nose Landing Gear Area
ATA
REFERENCE
1.
ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing, damage AC43.13-1B/2B
and security of attachment.
2.
FORWARD EVAPORATOR FILTER - Inspect for
cleanliness.
12
3.
REFERIGERANT LINES, SERVICE VALVES and HIGHPRESSURE RELIEF VALVES - Inspect lines and valves for
leakage, damage, attachment and surface corrosion.
21
4.
D.
MECH
NOSE LANDING GEAR AREA - Inspect skin, structure and
attaching hardware for wear, damage and corrosion. If
damage or corrosion is found in a given area, check the
adjacent area.
Nose Gear
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Page 2 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
ATA
REFERENCE
1.
2.
E.
INSP
MECH
INSP
WHEEL
a.
Inspect wheel for wear, damage and corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
32
CMM
TIRE
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
3.
SHIMMY DAMPER - Inspect for leaks, security and
attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for cracks,
damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect steering stop for
damage or distortion.
6.
LANDING and TAXI LIGHTS
12
CMM
12-20-15, 301
CMM
32
a.
Inspect the lights for broken lenses or bulbs on LJ-502
thru LJ-1062; LW-1 and After.
33
b.
Confirm correct focus of landing and taxi lights.
33
NOSE GEAR LOWER DRAG LEG - Remove nose gear
drag brace bolt and inspect lower drag leg hole for corrosion
and wear.
32
8.
NOSE GEAR ACTUATOR - Inspect actuator support
brackets for damage, cracks and loose or missing fasteners.
32
9.
NOSE GEAR RETRACT AND EXTENTION CHAIN (Exterior
and interior)
7.
MECH
a.
Inspect chain for broken links, excessive pin and link
wear, misalignment, rust, corrosion and dirt.
32
b.
Check sprockets for excessive wear and hook-shaped
teeth.
32
c.
Check chain for proper tension.
32
d.
Check nose gear and nose gear linkage clearance from
electrical wires and obstructions.
32
10. NOSE GEAR COMPONENTS - Inspect all components and
attaching hardware for wear, damage and surface corrosion.
32
Flight Compartment
ATA
REFERENCE
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Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
1.
2.
WINDSHIELD
a.
Inspect windshield for cracks and visibility impairment.
56
b.
Inspect windshield weather seal (Silicone) for
debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal (Polysulfide) for
debonding, cracks or wear.
56
WINDOWS
a.
b.
c.
Inspect exterior surface of cockpit side windows for
scratches, cracks, chips, excess crazing or any
indication of delamination.
56
Inspect for any contact of the milled edge of the window
with the airframe skin. Correct window contact by
reinstalling and recentering the window in the airframe
opening.
56
Inspect for any damage from paint strippers, solvents or
any unapproved sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for damage and wear.
25
5.
VENTILATION BLOWER - Inspect for dirt, grease, moisture
and security of attachment. Rotate blower by hand and make
sure that it rotates freely. Check for noise or evidence of worn
bearings. Turn on the blower and check for noise or vibration.
21
6.
HEATING SYSTEM
a.
Check all ducts for damage and deterioration.
b.
Check bleed air ducts (LJ-502 thru LJ-1062; LW-1 and
After) for damage, insulation and adequate clearance of
electrical wiring and control cables.
CAUTION:
Prior to installing pilot's compartment floor panels,
visually inspect the entire length of the elevator
control cable in this area to assure adequate
clearance between the cable and electrical wiring,
bleed air ducts, bleed air duct clamps, and
structural components to prevent chaffing and
wear.
F.
56
21
21
Cabin Section
ATA
REFERENCE
1.
2.
WINDOWS - Inspect exterior surface of windows for deep
scratches, cracks, chips and excessive crazing or other
damage.
56
ROTATING or FLASHING BEACON - Inspect for cracked or
broken lenses.
33
Copyright © Textron Aviation Inc.
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MECH
INSP
Page 4 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
G.
06-50-00, 001
3.
ACCESS DOORS - Inspect for fit and attachment.
4.
OUTFLOW and SAFETY VALVES - Drain outflow valve
control line.
5.
SEAT TRACKS - Inspect seat tracks for damage and wear.
6.
PRESSURIZATION DUCTS - Inspect for security of
attachment.
21
7.
FLAPPER VALVE (LJ-502 thru LJ-1062; LW-1 and After) Check for proper operation and excessive air noise.
21
21
25-20-00, 201
Rear Fuselage and Empennage
ATA
REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and inspect.
2.
ELT BATTERY
INSP
53-10-00, 601
a.
Inspect for leakage, corrosion or loose connections.
25
b.
Determine remaining useful life.
25
3.
NAVIGATION LIGHTS and ROTATING (Flashing) BEACONS
- Inspect for broken or cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security of attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the drain holes in the 53-10-00, 601
bottom of the ventral fin for obstructions.
6.
DEICER BOOTS - Inspect for deterioration, damage and
attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect the drain holes
for obstructions.
27
8.
STATIC WICKS
9.
MECH
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
EMPENNAGE and CONTROL SURFACES
a.
Check elevator trim tab free play.
27-30-18, 601
b.
Check rudder trim tab free play.
27-20-19, 601
c.
Inspect skin, structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion is found
in a given area, check the adjacent area.
10. OXYGEN SYSTEM - Inspect plumbing for security of
attachment.
27
35
11. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and security AC43.13-1B/2B
of attachment.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
12. AVIONICS and AUTOPILOT - Inspect avionics and autopilot
equipment and racks for security, corrosion and signs of
water leakage.
13. VERTICAL STABILIZER - Inspect front and rear spars of the
vertical stabilizer for loose or missing rivets or fasteners.
55
14. CONTROL CABLE SEALS - Inspect for deterioration,
security, cleanliness and lubrication.
27
15. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
H.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets, etc.)
for bulges, splits, bends or cracks which are conditions
for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and associated
equipment for wear, cracks, breaks, attachment,
alignment, clearance and proper operation. Replace
cables that have more than three broken wires in any
given three-foot cable length or have evidence of
corrosion.
27
20-04-00, 201
Left-Hand Outboard Wing
ATA
REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES - Determine that the
drain holes are open in the wing center section and outboard
wing upper attachment fittings.
SIRM
3.
4.
MECH
INSP
LIGHTS
a.
Inspect the navigation and recognition (if installed) lights
for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked lenses, if
installed.
33
c.
Inspect the landing lights for broken or cracked lenses
on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for obstructions.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
c.
5.
DEICER BOOTS - Inspect exterior surface for deterioration,
damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
06-50-00, 001
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Page 6 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
7.
8.
I.
STATIC WICKS
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
INTERGRAL FUEL TANK (LW-1 and After) - Inspect the
exterior surface of the intergral tank access doors for leaks.
06-50-00, 001
28
Left-Hand Wing Center Section
ATA
REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
2.
FUEL TANKS and VENTS
Inspect the exterior of the center section for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing for flexibility, splits, cracks, or
distortion.
28
Inspect the exterior openings of the vents for
obstructions.
28
3.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
06-50-00, 001
4.
SUPERCHARGER (LJ-1 thru LJ-113 except LJ-76) - Check
Hydraulic Drive system pressure.
21
5.
SUPERCHARGER DUCTS and FIREWALL
PRESSURIZATION SHUTOFF VALVE (LJ-1 thru LJ-501)
a.
Check supercharger and ducts for condition and
attachment.
21
b.
Inspect firewall pressurization shutoff valve for condition
and freedom of operation.
21
6.
SUPERCHARGER MOTOR - (LJ-1 thru LJ-113 except LJ76) - Check for leaks and general condition.
21
7.
FLOW CONTROL VALVE - (LJ-1 thru LJ-501) - Inspect valve
and associated equipment ducts for damage, deterioration
and attachment.
21
SILENCER - (LJ-1 thru LJ-501) - Check for deterioration,
damage and security of attachment.
21
8.
J.
INSP
MECH
INSP
28
a.
c.
MECH
Left-Hand Main Landing Gear Area
ATA
REFERENCE
1.
WHEELS
a.
Inspect wheels for wear, damage and corrosion.
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
CMM
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Page 7 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
K.
2.
BRAKES - Inspect brake discs, linings and plumbing for
wear damage, leaks, corrosion and security of all
components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and correct
inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT - Check strut for 12-20-33, 301
leaks and proper extension.
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect exposed
wiring and equipment for chafing, damage and proper routing AC43.13-1B/2B
and security of attachment.
6.
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible damage
and wear.
32
b.
Inspect brackets for cracks and loose or missing rivets.
32
c.
Inspect actuators for leakage of internal lubricant.
32
Left-Hand Engine
ATA
REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice system
(spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall filter for
evidence of foreign matter, corrosion or microbiological
growth in the fuel system. If any microbiological growth is
found, use BIOBOR JF or Kathon FP 1.5 additive.
12
3.
MECH
INSP
PROPELLERS
a.
Inspect for damage and attachment (spinner removal
required).
61
b.
Inspect the carbon block pin for freedom of movement.
61
76
c.
Check for no metal-to-metal contact between the brass
ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct adjustment,
evidence of binding and security of attachment.
76
e.
Inspect mechanical feedback ring, stop rods and
springs for damage.
61
76
4.
ENGINE OIL FILTER - Inspect for metal particles.
5.
INERTIAL ENGINE ANTI-ICER
a.
Check vane(s) for freedom of movement and correct
travel. Lubrication of linkage and vane hinges may be
necessary.
Copyright © Textron Aviation Inc.
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P&W
12
30
Page 8 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
b.
c.
d.
6.
7.
On LJ-76, LJ-114 thru LJ-241, inspect plumbing, valve,
actuator and limit switches for damage, leakage,
operation and security of attachment.
30
On LJ-125, LJ-170 thru LJ-241 and airplanes With Kit
90-4015 installed, replace or bake dryer cartridge.
Check main and standby actuator motors and limit
switches for operation and correct adjustment.
12-20-05, 301
30
On LJ-242 thru LJ-1062, LW-1 and After and airplanes
With Kit 90-9017 installed, check the push-pull control
for damage, security of attachment, freedom of
movement and full travel.
12
30
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal particles and
damage. For LJ-1 thru LJ-672 and LW-1 thru LW-154
With Kits 100-9011-1 or -3 installed, LJ-637 thru LJ691, LW-155 thru LW-190, perform the MAGNETIC
12
CHIP DETECTOR 25-HOUR INSPECTION procedure. 79-30-05, 401
For LJ-692 thru LJ-1062 and LW-191 and After, or prior
serials With Kit 100-9013-1 installed, perform the
MAGNETIC CHIP DETECTOR INSPECTION
procedure.
b.
Check light in annunciator panel for proper operation.
For LJ-692 thru LJ-1062, LW-191 and After, or prior
serials With Kit 100-9013-1 installed, perform the
MAGNETIC CHIP DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
8.
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT - Inspect
for fretting and/or corrosion when replacing outlet filter.
P&W
9.
COWLING - Remove entire cowling and inspect skin,
structure and attaching hardware for wear, damage and
corrosion.
71
10. OIL COOLER
a.
Inspect oil cooler and plumbing for leakage, damage
and security of attachment.
79
b.
Inspect drain plug for leakage, security and safety wire.
79
11. AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
71
12. FIRESEALS - Inspect for condition.
71
13. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage and
corrosion.
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78
Page 9 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
b.
Inspect the exhaust system and visible portions of the
power turbine for burning, distortion, damage and
cracks.
P&W
14. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for binding,
stiff operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and safeties for
corrosion, damage and attachment.
NOTE:
Special attention should be made to the cambox.
c.
76
76
Inspect control cables for damage such as crimps, cuts,
abrasions or tight bends. If exterior covering is ruptured,
perform leak test.
76
15. CONTROL CABLE BOOTS - Inspect the control cable boots
for excessive compression, twist, wear or aging which could
cause binding.
76
16. STARTER-GENERATOR - Inspect one set of brushes for
indications of excessive wear or damage (determine wear by 24-30-05, 601
observing diagonal groove on brush).
17. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's manual.
P&W
b.
Inspect engine in accordance with the instructions found
in the engine manufacturer's manual.
P&W
18. IGNITION SYSTEM
a.
b.
c.
d.
IGNITION GLOW PLUGS (LJ-1 thru LJ-922 and LW-1
thru LW-388 Without Kit 100-9014-1 installed) - Inspect
glow plugs.
P&W
IGNITION REGULATOR BOX (LJ-1 thru LJ-922 and
LW-1 thru LW-388 Without Kit 100-9014-1 installed)
P&W
1.
Inspect regulator box and electrical harness for
damage and security of attachment.
P&W
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
SPARK IGNITER PLUGS (LJ-1 thru LJ-922, LW-1 thru
LW-388 With Kit 100-9014-1; LJ-923 and After; LW339 and After) - Inspect the igniter plugs as described in
the engine maintenance manual.
P&W
IGNITION EXCITER (LJ-1 thru LJ-922, LW-1 thru LW388 With Kit 100-9014-1; LJ-923 and After; LW-339
and After)
P&W
1.
P&W
Inspect exciter and electrical harness for damage
and security of attachment.
Copyright © Textron Aviation Inc.
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Page 10 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
19. FUEL RECOVERY SYSTEM
a.
b.
FUEL DRAIN COLLECTOR SYSTEM (LJ-1 thru LJ-641
With Kit 100-9008-1S; LW-1 thru LW-123 With Kit 1009008-3S; LJ-642 thru LJ-900; LW-124 thru LW-333).
1.
Check tank, pump, pump filter and plumbing for
leaks and security of attachment.
71
2.
Perform a leak check on the collector tank.
71
3.
Check wiring to pump and tank float switch for
damage and security of attachment.
71
4.
Check pump for proper operation.
71
FUEL PURGE (LJ-901 thru LJ-1062; LW-334 and After)
1.
Remove fuel purge system air tank and inspect.
Clean as required.
71
2.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
20. ENVIRONMENTAL BLEED AIR FLOW CONTROL UNIT (LJ502 thru LJ-1062, LW-1 and After) - Inspect valve and
associated equipment, electrical wiring and ducts for
damage, security of connections and attachment.
21
21. COMPRESSOR INLET - Remove the air inlet screen and
inspect the compressor inlet area, struts, first stage blades
and vanes of dirt deposits, corrosion, erosion, cracks and
damage by foreign objects.
P&W
22. HIGH PRESSURE FUEL PUMP FILTERS - Inspect the
engine-driven high pressure fuel pump filters.
P&W
23. SUPERCHARGER GEARBOX (LJ-1 thru LJ-501) - Check
gearbox for leaks and fill gearbox as required.
12
24. SUPERCHARGER HYDRAULIC PUMP (LJ-1 thru LJ-113
except LJ-76) - Check for leaks and general condition.
21
25. SUPERCHARGER HYDRAULIC RESERVOIR (LJ-1 thru LJ113 except LJ-76)
L.
12-10-04, 301
a.
Check fluid level.
b.
After airplane has stood idle for 4 to 5 hours, check
system for leakage by loosening the cap on the
reservoir; trapped air indicates the system is free of
leakage.
21
26. OIL PRESSURE SNUBBER (P/N 3R1) with porous-type
element (LJ-572 thru LJ-752; LW-39 thru LW-262) - Clean
element.
12
Right-Hand Outboard Wing
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Page 11 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
ATA
REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES - Determine that the
drain holes are open in the wing center section and outboard
wing upper attachment fittings.
SIRM
3.
4.
INSP
MECH
INSP
LIGHTS
a.
Inspect the navigation and recognition (if installed) lights
for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked lenses, if
installed.
33
c.
Inspect the landing lights for broken or cracked lenses
on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for obstructions.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
c.
5.
DEICER BOOTS - Inspect exterior surface for deterioration,
damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
06-50-00, 001
7.
STATIC WICKS
8.
MECH
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
INTERGRAL FUEL TANK (LW-1 and After) - Inspect the
exterior surface of the intergral tank access doors for leaks.
06-50-00, 001
28
M. Right-Hand Wing Center Section
ATA
REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
2.
FUEL TANKS and VENTS
28
a.
Inspect the exterior of the center section for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing for flexibility, splits, cracks, or
distortion.
28
Inspect the exterior openings of the vents for
obstructions.
28
c.
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Page 12 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
N.
3.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
4.
BATTERY
06-50-00, 001
a.
Service as required.
12
b.
Remove battery and inspect the battery box, cables and
vent tubes for deterioration or obstructions.
24
Right-Hand Main Landing Gear Area
ATA
REFERENCE
1.
O.
MECH
INSP
MECH
INSP
WHEELS
a.
Inspect wheels for wear, damage and corrosion.
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
CMM
2.
BRAKES - Inspect brake discs, linings and plumbing for
wear damage, leaks, corrosion and security of all
components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and correct
inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT - Check strut
for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect exposed
wiring and equipment for chafing, damage and proper routing AC43.13-1B/2B
and security of attachment.
6.
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible damage
and wear.
32
b.
Inspect brackets for cracks and loose or missing rivets.
32
c.
Inspect actuators for leakage of internal lubricant.
32
Right-Hand Engine
ATA
REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice system
(spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall filter for
evidence of foreign matter, corrosion or microbiological
growth in the fuel system. If any microbiological growth is
found, use BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS
a.
Inspect for damage and attachment (spinner removal
required).
Copyright © Textron Aviation Inc.
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61
Page 13 of 21
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
b.
Inspect the carbon block pin for freedom of movement.
61
76
c.
Check for no metal-to-metal contact between the brass
ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct adjustment,
evidence of binding and security of attachment.
76
e.
Inspect mechanical feedback ring, stop rods and
springs for damage.
61
76
4.
ENGINE OIL FILTER - Inspect for metal particles.
5.
INERTIAL ENGINE ANTI-ICER
a.
Check vane(s) for freedom of movement and correct
travel. Lubrication of linkage and vane hinges may be
necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect plumbing, valve,
actuator and limit switches for damage, leakage,
operation and security of attachment.
30
On LJ-125, LJ-170 thru LJ-241 and airplanes With Kit
90-4015 installed, replace or bake dryer cartridge.
Check main and standby actuator motors and limit
switches for operation and correct adjustment.
12-20-05, 301
30
On LJ-242 thru LJ-1062, LW-1 and After and airplanes
With Kit 90-9017 installed, check the push-pull control
for damage, security of attachment, freedom of
movement and full travel.
12
30
c.
d.
6.
7.
8.
P&W
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal particles and
damage. For LJ-1 thru LJ-672 and LW-1 thru LW-154
With Kits 100-9011-1 or -3 installed, LJ-637 thru LJ691, LW-155 thru LW-190, perform the MAGNETIC
12
CHIP DETECTOR 25-HOUR INSPECTION procedure. 79-30-05, 401
For LJ-692 thru LJ-1062 and LW-191 and After, or prior
serials With Kit 100-9013-1 installed, perform the
MAGNETIC CHIP DETECTOR INSPECTION
procedure.
b.
Check light in annunciator panel for proper operation.
For LJ-692 thru LJ-1062, LW-191 and After, or prior
serials With Kit 100-9013-1 installed, perform the
MAGNETIC CHIP DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT - Inspect
for fretting and/or corrosion when replacing outlet filter.
P&W
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 14 of 21
Print Date: Thu Jan 11 11:03:55 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
9.
COWLING - Remove entire cowling and inspect skin,
structure and attaching hardware for wear, damage and
corrosion.
71
10. OIL COOLER
a.
Inspect oil cooler and plumbing for leakage, damage
and security of attachment.
79
b.
Inspect drain plug for leakage, security and safety wire.
79
11. AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
71
12. FIRESEALS - Inspect for condition.
71
13. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage and
corrosion.
P&W
b.
Inspect the exhaust system and visible portions of the
power turbine for burning, distortion, damage and
cracks.
P&W
14. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for binding,
stiff operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and safeties for
corrosion, damage and attachment.
NOTE:
Special attention should be made to the cambox.
c.
76
76
Inspect control cables for damage such as crimps, cuts,
abrasions or tight bends. If exterior covering is ruptured,
perform leak test.
76
15. CONTROL CABLE BOOTS - Inspect the control cable boots
for excessive compression, twist, wear or aging which could
cause binding.
76
16. STARTER-GENERATOR - Inspect one set of brushes for
indications of excessive wear or damage (determine wear by 24-30-05, 601
observing diagonal groove on brush).
17. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's manual.
P&W
b.
Inspect engine in accordance with the instructions found
in the engine manufacturer's manual.
P&W
18. IGNITION SYSTEM
a.
b.
IGNITION GLOW PLUGS (LJ-1 thru LJ-922 and LW-1
thru LW-388 Without Kit 100-9014-1 installed) - Inspect
glow plugs.
P&W
IGNITION REGULATOR BOX (LJ-1 thru LJ-922 and
LW-1 thru LW-388 Without Kit 100-9014-1 installed)
P&W
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
c.
d.
1.
Inspect regulator box and electrical harness for
damage and security of attachment.
P&W
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
SPARK IGNITER PLUGS (LJ-1 thru LJ-922, LW-1 thru
LW-388 With Kit 100-9014-1; LJ-923 and After; LW339 and After) - Inspect the igniter plugs as described in
the engine maintenance manual.
P&W
IGNITION EXCITER (LJ-1 thru LJ-922, LW-1 thru LW388 With Kit 100-9014-1; LJ-923 and After; LW-339
and After)
P&W
1.
Inspect exciter and electrical harness for damage
and security of attachment.
P&W
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
19. FUEL RECOVERY SYSTEM
a.
b.
P.
FUEL DRAIN COLLECTOR SYSTEM (LJ-1 thru LJ-641
With Kit 100-9008-1S; LW-1 thru LW-123 With Kit 1009008-3S; LJ-642 thru LJ-900; LW-124 thru LW-333).
1.
Check tank, pump, pump filter and plumbing for
leaks and security of attachment.
71
2.
Perform a leak check on the collector tank.
71
3.
Check wiring to pump and tank float switch for
damage and security of attachment.
71
4.
Check pump for proper operation.
71
FUEL PURGE (LJ-901 thru LJ-1062; LW-334 and After)
71
1.
Remove fuel purge system air tank and inspect.
Clean as required.
71
2.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
20. ENVIRONMENTAL BLEED AIR FLOW CONTROL UNIT (LJ502 thru LJ-1062, LW-1 and After) - Inspect valve and
associated equipment, electrical wiring and ducts for
damage, security of connections and attachment.
21
21. COMPRESSOR INLET - Remove the air inlet screen and
inspect the compressor inlet area, struts, first stage blades
and vanes of dirt deposits, corrosion, erosion, cracks and
damage by foreign objects.
P&W
22. HIGH PRESSURE FUEL PUMP FILTERS - Inspect the
engine-driven high pressure fuel pump filters.
P&W
23. OIL PRESSURE SNUBBER (P/N 3R1) with porous-type
element (LJ-572 thru LJ-752; LW-39 thru LW-262) - Clean
element.
12
Landing Gear Retraction
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
ATA
REFERENCE
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly cycle the
landing gear, use only an external power source capable of
delivering and maintaining 28.25 ± 0.25 volts throughout the
extension and retraction cycles when performing the landing
gear retraction inspection.
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction system for
proper operation of all components through at least two
complete cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of switches.
32
b.
Check wiring for damage and security of connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of switches.
32
b.
Check wiring for damage and security of connection.
32
5.
WARNING HORN - Check for proper operation.
32
6.
MAIN GEAR DOWNLOCKS - Check locking mechanism for
positive engagement in extended position.
32
7.
SAFETY SWITCH - Check for security and proper operation.
32
8.
ACTUATORS - Check for noise, binding and proper rigging.
32
9.
LIMIT SWITCHES
a.
Check for correct adjustment.
32
b.
Check for security of attachment.
32
10. EMERGENCY EXTENSION - Check system for freedom of
operation and positive engagement of downlocks.
CAUTION:
Do not continue operation after receiving a gear-down
indication on all gears. Further movement of the handle
could damage the drive mechanism and prevent
subsequent electrical gear retraction. The landing gear
cannot be retracted manually.
32
11. NOSE GEAR RETRACT CHAIN (Exterior only) - Check nose
gear and nose gear linkage clearance from electrical wires
and obstructions.
32
12. PLACARDS - Check that all placards are in place and are
legible.
11-20-00, 201
POH
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
Q.
Operational Inspection
ATA
REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to be applied
during start and run of the engine. Refer to the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight Manual for
the engine start and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper operation.
2.
CROSSFEED VALVE - Check for proper operation.
3.
BOOST PUMPS - Check for proper operation.
4.
AUXILIARY FUEL TRANSFER JET PUMPS (LW-1 and After)
- Check for proper operation.
5.
STARTER-GENERATOR
6.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
7.
ENGINE OIL - Check for proper pressure and temperature
limits.
8.
FUEL QUANTITY GAGES - Check for proper operation.
9.
INTERSTAGE TURBINE TEMPERATURE / INLET
TEMPERATURE - Check for correct limits on engine start.
10. VACUUM SYSTEM - Check for correct limits.
11. PNEUMATIC PRESSURE GAGE - Check for correct
pressure.
12. GYRO INSTRUMENTS - Check for erratic or noisy operation.
13. PROPELLERS
a.
Perform low pitch torque check.
76
b.
Perform secondary low pitch stop check. (If installed)
76
14. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
15. PROPELLER SYNCHRONIZER / SYNCHROPHASER - Refer
to FUNCTIONAL TEST and confirm proper synchronization.
61-23-00, 601
61
16. PROPELLER GOVERNOR - Check governor operation
(including feathering and reversing).
17. IDLE RPM - Check for correct rpm (both high and low rpm).
18. AC INVERTERS - Check for proper operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper operation and
cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for proper operation and
cycling.
22. ELECTRICAL SYSTEM - Perform functional checks.
24
23. ENVIRONMENTAL SYSTEM - Check for proper operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation as outlined in the
applicable King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual Supplement.
25. STALL WARNING - Check for proper operation.
26. ENGINE FIRE DETECTORS (If Installed) - Perform system test
according to instructions found in the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight
Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) - Perform system
test according to instructions found in the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight
Manual.
28. PRESSURIZATION SYSTEM - Check for proper operation.
NOTE:
Refer to the King Air 90 Pilot's Operating Handbook and
FAA Approved Airplane Flight Manual and perform
system test.
29. CONDITION LEVER - Check for clean shutdown atIDLE-CUTOFF.
30. PITOT TUBE - Check for proper heating at the unit and for
obstructions.
31. LANDING and TAXI LIGHTS - Check for proper operation.
32. OUTBOARD WING LIGHTS (Right and Left) - Check proper
operation of all navigation and strobe (if installed) lights.
33. COCKPIT LIGHTS - Check for proper operation.
34. EFIS COOLING BLOWERS (If installed) - Check for proper
operation.
35. ELECTRIC ELEVATOR TRIM - Check for proper operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
36. ENGINE and PROPELLER CONTROLS - Check for freedom
of movement, full travel and friction-lock operation.
37. STATIC SYSTEM - Inspect alternate air valve for operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational check.
39. THRESHOLD LIGHT - Check for proper operation.
40. CABIN and COMPARTMENT LIGHTS - Check for proper
operation.
41. PILOT'S and COPILOT'S SEATS and SEAT BELTS - Check
seat adjustment mechanism and shoulder harness inertia reel
for operation.
42. CABIN SEATS and SEAT BELTS - Check seat adjustment
mechanism and shoulder harness inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps (If installed) do not fold too soon
and that they fold properly without interference.
b.
Check CABIN DOOR / CABIN DOOR OPEN annunciator
for proper operation.
c.
Inspect cabin door damper (If installed) for leakage and
proper operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and latch mechanism
for proper operation.
b.
Check that latches open and close freely.
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for smoothness
of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS - Check for
proper operation.
47. AILERON (LH and RH) - Check for freedom of movement.
48. AILERON TRIM TAB - Check trim tab actuator for smoothness
of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) - Check the
operation of the heated vents. They should be warm to the
touch.
50. STALL WARNING HEAT - Check for proper operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH and RH) Check flaps for noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-04 (Rev D0)
53. EXTERNAL POWER RELAY - Check for proper operation.
R.
54. ENGINE INERTIAL ANTI-ICER - Check for proper operation
and rigging.
30
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS - Check for
smoothness of operation. Make sure movement is between
inner and outer bushings.
27
Post Inspection Items
ATA
REFERENCE
1.
AIRPLANE CLEANED and SERVICED as required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or FLIGHT
TEST - Check for oil leaks, security and attachment of all
components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE BULLETINS
- Must be reviewed and complied with as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
Make sure Special Inspection requirements are
complied with at the appropriate intervals.
05-21-05, 601
b.
Perform Continuous Corrosion Control Inspection if
required by the environmental conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies noted by the
pilot must be checked and corrected as required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check for
proper operation and make sure ELT is ARMED before
returning airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper
pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If Installed)
Make sure all necessary emergency and survival equipment
are installed in the airplane and serviceable.
10. PLACARDS - Determine that all required placards are in
place and legible.
MECH
INSP
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books are filled out
properly.
2.
Inspection Completed
I certify that the Phase 4 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-05 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (SPECIAL) - INSPECTION/CHECK
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Scheduled Inspection Program (Special)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
If two inspection intervals are shown (i.e. 2,400 HRS OR 30 MONTHS) this indicates the inspection
requirement is due at whichever time frame occurs first.
Special Inspections
INSPECTION
INTERVAL
1.
LEFT-HAND ENGINE - Perform hot section inspection as required.
P&W SB 1003
2.
LEFT-HAND MAGNETIC CHIP DETECTOR - For LJ-1 thru LJ-672
and LW-1 thru LW-154 With Kits 100-9011-1 and -3 installed and
Without Kit 100-9013-1 installed, perform the MAGNETIC CHIP
DETECTOR 25-HOUR INSPECTION procedure (Ref. 12-10-03,
301). For LJ-673 thru LJ-1062 and LW-155 thru LW-190, Without
Kit 100-9013-1 installed, perform the MAGNETIC CHIP
DETECTOR INSPECTION procedure (Ref. 12-10-03, 301).
25 HOURS
3.
LEFT-HAND ENGINE OIL FILTER - Replace filter.
1,000 HOURS
4.
LEFT-HAND MAIN GEAR SHOCK ABSORBER ASSEMBLY Inspect for cracks, wear and corrosion interior and exterior
(Disassembly required).
8,000 CYCLES or 6
YEARS
5.
LEFT-HAND MAIN GEAR DRAG BRACE ASSEMBLY - Inspect for
cracks, wear and corrosion interior and exterior (Disassembly
required).
8,000 CYCLES or 6
YEARS
6.
LEFT-HAND MAIN GEAR AXLE ASSEMBLY and TORQUE
KNEES - Inspect for cracks, wear and corrosion interior and
exterior (Disassembly required) (Ref. Component Maintenance
Manual, 32-00-00).
8,000 CYCLES or 6
YEARS
LEFT-HAND MAIN GEAR ACTUATOR CLEVIS - Inspect clevis
hole for wear (Disassembly required). (Ref. Component
Maintenance Manual, 32-00-00).
1,000 CYCLES
7.
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MECH
INSP
Page 1 of 5
Print Date: Thu Jan 11 11:03:56 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-21-05 (Rev D0)
8.
LEFT-HAND MAIN LANDING GEAR WHEELS - Inspect main
wheels in accordance with manufacturer's instructions (Ref.
Component Maintenance Manual, 32-00-00).
9.
LEFT-HAND FLAP FLEXIBLE SHAFT
a.
b.
On LJ-1 thru LJ-526 Without Kit 99-4017 S, inspect for wear
and freedom of operation with both ends disconnected (Ref.
Chapter 27).
2,000 Cycles
On LJ-1 thru LJ-526 With Kit 99-4017 S, LJ-527 and After,
and LW-1 and After, inspect for wear and freedom of
operation with both ends disconnected (Ref. Chapter 27).
5,000 Cycles
10. LEFT-HAND WING PANEL UPPER and LOWER MAIN SPAR
CAP - Check for corrosion. Inspect as outlined in the King Air
Series Structural Inspection and Repair Manual (Ref. Chapter 57).
5 YEAR INITIAL/ 1
YEAR RECURRING
11. RIGHT-HAND ENGINE - Perform hot section inspection as
required.
P&W SB 1003
12. RIGHT-HAND MAGNETIC CHIP DETECTOR - For LJ-1 thru LJ672 and LW-1 thru LW-154 With Kits 100-9011-1 and -3 installed
and Without Kit 100-9013-1 installed, perform the MAGNETIC
CHIP DETECTOR 25-HOUR INSPECTION procedure (Ref. 12-1003, 301). For LJ-673 thru LJ-1062 and LW-155 thru LW-190,
Without Kit 100-9013-1 installed, perform the MAGNETIC CHIP
DETECTOR INSPECTION procedure (Ref. 12-10-03, 301).
25 HOURS
13. RIGHT-HAND ENGINE OIL FILTER - Replace filter.
1,000 HOURS
14. RIGHT-HAND MAIN GEAR SHOCK ABSORBER ASSEMBLY Inspect for cracks, wear and corrosion interior and exterior
(Disassembly required).
8,000 CYCLES or 6
YEARS
15. RIGHT-HAND MAIN GEAR DRAG BRACE ASSEMBLY - Inspect
for cracks, wear and corrosion interior and exterior (Disassembly
required).
8,000 CYCLES or 6
YEARS
16. RIGHT-HAND MAIN GEAR AXLE ASSEMBLY and TORQUE
KNEES - Inspect for cracks, wear and corrosion interior and
exterior (Disassembly required).
8,000 CYCLES or 6
YEARS
17. RIGHT-HAND MAIN GEAR ACTUATOR CLEVIS - Inspect clevis
hole for excessive wear.(Ref. Component Maintenance Manual, 3200-00).
1,000 CYCLES
18. RIGHT-HAND MAIN LANDING GEAR WHEELS - Inspect main
wheels in accordance with manufacturer's instructions (Ref.
Component Maintenance Manual, 32-00-00).
19. RIGHT-HAND FLAP FLEXIBLE SHAFT
a.
b.
On LJ-1 thru LJ-526 Without Kit 99-4017 S, inspect for wear
and freedom of operation with both ends disconnected (Ref.
Chapter 27).
2,000 Cycles
On LJ-1 thru LJ-526 With Kit 99-4017 S, LJ-527 and After,
and LW-1 and After, inspect for wear and freedom of
operation with both ends disconnected (Ref. Chapter 27).
5,000 Cycles
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-05 (Rev D0)
20. RIGHT-HAND WING PANEL UPPER and LOWER MAIN SPAR
CAP - Check for corrosion. Inspect as outlined in the King Air
Series Structural Inspection and Repair Manual (Ref. Chapter 57).
5 YEAR INITIAL/ 1
YEAR RECURRING
21. EDGELIGHTED PANEL ASSEMBLIES - Inspect for condition (Ref.
Chapter 33).
2,000 HOURS or 4
YEARS
22. NOSE GEAR SHOCK ABSORBER ASSEMBLY - Inspect for
cracks, wear and corrosion interior and exterior (Disassembly
required).
8,000 CYCLES or 6
YEARS
23. NOSE GEAR DRAG BRACE ASSEMBLY - Inspect for cracks,
wear and corrosion interior and exterior (Disassembly required).
8,000 CYCLES or 6
YEARS
24. NOSE GEAR AXLE ASSEMBLY and TORQUE KNEES - Inspect
for cracks, wear and corrosion interior and exterior (Disassembly
required).
8,000 CYCLES or 6
YEARS
25. NOSE GEAR ACTUATOR CLEVIS - Inspect clevis hole for
excessive wear (Disassembly required) (Ref. Component
Maintenance Manual, 32-00-00).
1,000 CYCLES
26. NOSE LANDING GEAR WHEEL - Inspect nose wheel in
accordance with manufacturer's instructions (Ref. Component
Maintenance Manual, 32-00-00).
27. ALTIMETER and PITOT and STATIC SYSTEM - Inspect as
required by FAR 91.411 (Ref. Chapter 34 for system check and
leak test).
24 MONTHS
28. POWER LEVER DETENT PIN - Inspect for wear. Maximum
allowable wear is 1/3 of pin diameter (Ref. Chapter 76).
1,200 HOURS
29. FLIGHT COMPARTMENT FIRE EXTINGUISHER - Hydrostatically
test extinguisher (Ref. Chapter 26).
12 YEARS
30. CABIN FIRE EXTINGUISHER - Deleted, Moved to Airworthiness
Limitations Manual, 90-590024-187.
31. ENGINE FIRE EXTINGUISHER - Deleted, Moved to Airworthiness
Limitations Manual, 90-590024-187.
32. WING ATTACHMENT BOLTS - Inspect the eight bolts as outlined in
the King Air Series Structural Inspection and Repair Manual (Ref.
Chapter 57).
1,000 HOURS or 3
YEARS
33. RETRACT GEARBOX and CLUTCH (Mechanical landing gear) Inspect for cracks, wear and corrosion internal and external
(Disassembly required) (Ref. 32-30-01, 401).
8,000 CYCLES or 6
YEARS
34. LANDING GEAR ACTUATORS (Mechanical) - Perform a TOTAL
END PLAY CHECK (Removal from aircraft required) (Ref. 32-3007, 601).
1,000 CYCLES or 30
MONTHS
35. FIRE EXTINGUISHER SQUIB CARTRIDGE (If Installed) - Deleted,
Moved to Airworthiness Limitations Manual, 90-590024-187.
10,000 CYCLES
36. FLIGHT CONTROLS - Inspect all flight control pulley brackets and
INITIAL/5,000
CYCLES
castings for cracks, corrosion, wear and attachment (Ref. 20-04-00,
RECURRING
201).
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-05 (Rev D0)
37. OXYGEN CYLINDER - DOT 3HT 1850 (Lightweight composite) Deleted, Moved to Airworthiness Limitations Manual, 90-590024187.
38. OXYGEN CYLINDER - DOT 3AA 1800 (Standard weight) Deleted, Moved to Airworthiness Limitations Manual, 90-590024187.
39. OXYGEN CYLINDER - DOT 3HT 1850 (Lightweight) - Deleted,
Moved to Airworthiness Limitations Manual, 90-590024-187.
40. ENGINE MOUNT VIBRATION ISOLATORS - Inspect vibration
isolators for deterioration, damage and attachment (Ref.
Component Maintenance Manual, 71-00-00).
ENGINE TBO or 4,000
HOURS
41. FUSELAGE INSPECTION
a.
Perform inspection as outlined in 53-10-00, 601 for airplanes
LJ-1 thru LJ-985, LJ-987 thru LJ-995, LJ-997 thru LJ-1010,
LW-1 and After.
9,000 CYCLES
INITIAL/ 3,000
CYCLES RECURRING
b.
Perform inspection as outlined in 53-10-00, 601 for airplanes
LJ-986, LJ-996, and LJ-1011 thru LJ-1062.
6,000 CYCLES
INITIAL/ 3,000
CYCLES RECURRING
42. WING STRUCTURE - Perform inspection as outlined in the King Air
Series Structural Inspection and Repair Manual (Ref. Chapter 57).
43. CABIN COMBUSTION HEATER (LJ-1 thru LJ-501) - Pressure test
(Ref. Janitrol Aero Service Bulletin No. 55).
1,000 AIRCRAFT
HOURS or 500
HEATER HOURS
44. DETAILED AILERON INSPECTION (Removal of aileron is
required, Ref 57-60-01, 501)
a.
Inspect the entire assembly for skin cracks and evidence of
corrosion.
3,600 HOURS
INITIAL/800 HOURS
SUBSEQUENT
b.
Inspect under the hinge fittings for cracks and corrosion using
low power magnification. Pay particular attention to the areas
between the screw holes for cracks.
3,600 HOURS
INITIAL/800 HOURS
SUBSEQUENT
45. STANDBY POWER SUPPLY BATTERY (PSD-835) - Check, load
test, and recharge if necessary (Ref. Component Maintenance
Manual, 24-00-00).
REFER TO
APPLICABLE
VENDOR MANUAL
46. CABIN ALTITUDE WARNING SYSTEM - Perform the CABIN
ALTITUDE WARNING PRESSURE SWITCH TEST procedure
(Ref. 21-30-11, 501).
12 MONTHS
47. SKIN, EXTERIOR AIRFRAME - Inspect exterior skin (including
10,000 CYCLES
nose wheel well keels) for cracks and loose and missing fasteners. INITIAL/1,000 CYCLES
If any repetitive damage is found, inspection on the internal structure
RECURRING
for degradation in the local area is required.
1,000 HOURS
48. AIR CONDITIONING MOTOR BRUSHES - Inspect air conditioning
INITIAL/1,000HOURS
motor brushes for damage, wear and arcing.
RECURRING
Copyright © Textron Aviation Inc.
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Page 4 of 5
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King Air 90 Series Maintenance Manual (Rev D1)
05-21-05 (Rev D0)
49. WING ATTACH BOLTS - Check wing attach bolts for proper torque FIRST SCHEDULED
(Ref. King Air Series Structural Inspection and Repair Manual (Ref. INSPECTION/ FIRST
SCHEDULED
Chapter 57).
INSPECTION AFTER
WING ADJUSTMENT
50. PILOT'S FUEL CONTROL PANEL and LOWER EDGELIGHTED
PANEL, COPILOT'S EDGELIGHTED CIRCUIT BREAKER
PANEL, and WIRING CIRCUITRY BELOW the STORM WINDOWS
- Inspect for burned out bulbs, delamination, corrosion, and
evidence of moisture ingress (Panel removal is required).
51. NOSE AND MAIN LANDING GEAR TRUNNION BOLT HOLES
AND DRAG BRACE ATTACH HOLES (Airframe Side) - Inspect for
cracks, corrosion, damage, and elongation of holes.
12 MONTHS
8,000 CYCLES or 6
YEARS BUT NO
LATER THAN THE
NEXT SCHEDULED 6
YEARS GEAR
INSPECTION
52. NOSE AND MAIN LANDING GEAR MECHANICAL ACTUATORS - 1,000 CYCLES or 30
MONTHS,
Lubricate (Ref. 12-20-11, 301).
WHICHEVER
OCCURS FIRST
53. Perform the Horizontal Stabilizer (Elevator) Structural Inspection
Procedure as outlined in the King Air Series Structural Inspection
and Repair Manual (Ref. 55-00-13, 201).
10,000 HOURS
INITIAL/5,000 HOURS
RECURRING
54. Perform the Vertical Stabilizer (Rudder) Structural Inspection
Procedure as outlined in the King Air Series Structural Inspection
and Repair Manual (Ref. 55-00-14, 201).
10,000 HOURS
INITIAL/5,000 HOURS
RECURRING
55. FLAPS - Remove flaps and inspect flap attach brackets, flap
structure, tracks, and attachment hardware for wear. Replace all
roller bearings with new.
3000 CYCLES or
THREE YEARS
56. NACELLE SPLICE PLATES - Inspect the splice plates for
condition and corrosion.
2.
10,000 HOURS
INITIAL/ 1,000 HOURS
RECURRING
Inspection Completed
I certify that the Special Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
Copyright © Textron Aviation Inc.
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Page 5 of 5
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-00 (Rev D0)
1.
BIENNIAL SCHEDULED INSPECTION PROGRAMS
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Biennial Scheduled Inspection Programs
NOTE:
This inspection is an optional program for aircraft operating 200 hours or less in a 24-Month period (Ref. 0500-00, 001).
NOTE:
Additional inspections may be required by engine or propeller manufactures in their manuals. Refer to the
unscheduled maintenance checks portion of the supplier issued manuals to ensure continued
airworthiness.
A.
B.
C.
D.
The owner/operator is ultimately responsible for maintaining the airplane in an airworthy condition, including compliance with all
applicable Airworthiness Directives as specified in Part 39 of the Federal Aviation Regulations (FAR) under the Title 14 of the
Code of Federal Regulations. The owner/operator should select only qualified personnel to maintain the airplane, and ensure
that the airframe and power plant mechanic inspecting the airplane has access to all necessary manuals and service
information as well as to an approved inspection guide.
Airframe and power plant mechanics must have had previous experience in the satisfactory performance of the tasks required
by this inspection before being qualified to supervise, approve and return to service the airplane or any part thereof in need of
maintenance, preventative maintenance, repair or alteration.
It is further the responsibility of the owner/operator to ensure that the airplane is inspected in conformity with the requirements
covered in 14 CFR Part 91.409 (f) (3) of the Federal Aviation Regulations. This FAR Part covers the requirements concerning
approved airplane inspection programs. Aircraft Company has prepared the Inspection Program to assist the owner or
operator in meeting the foregoing responsibilities.
It is the responsibility of the owner or operator to obtain specific approval from their local airworthiness authority for any
alteration to the inspection Program.
NOTE:
E.
F.
G.
When warranted by service experience or engineering recommendations, an approved maintenance
program, including the inspection intervals, may be changed at any time with the approval of the local
airworthiness authority.
This document is a portion of the publications by which Textron Aviation Inc. provides the inspection requirements and
maintenance schedules for the continued airworthiness of the airframe of your airplane. Remember, maintenance requirements
for some supplier components (such as engines, propellers, avionics and other equipment) are separately provided by their
respective manuals. Those maintenance requirements and schedules are adopted by reference in the airframe maintenance
instructions for continued airworthiness. Have your maintenance personnel review the equipment installed on your airplane to
ensure the current, up-to-date supplier maintenance publications and manuals are available and that all required maintenance is
scheduled and performed as required under 14 CFR 91.403 (c).
This Inspection Program is provided to enable the owner/operator to inspect and maintain the airplane on an ongoing basis.
Included in the program is a sequence for conducting the program along with suggested times. The times and sequence are
recommendations that may be altered to suit a particular operation. While this program may be used as an outline, detailed
information of the systems and components in the airplane will be found in the various chapters/sections of the maintenance
manual and the pertinent supplier publications. It is also recommended that reference be made to the applicable maintenance
handbooks, service instructions, applicable FAA Regulations, Publications and supplier's specification for torque values,
clearance, settings, tolerances and other requirements.
This program is not intended to be all-inclusive, for no such program can replace the good judgement of a certified airframe and
power plant mechanic in the performance of his duties.
NOTE:
2.
In addition to the inspections prescribed by this schedule, the altimeter instrument and static system
and all ATC transponders MUST be tested and inspected in compliance with the requirements specified
in 14 CFR 91.411 and 91.413 at 24-month intervals or anytime the system is opened.
NOTE:
Information contained herein is applicable to a Beech King Air 90 airplanes except where differences
are indicated by serial number effectivity.
Special Conditions Cautionary Notice
CAUTION: The time periods in this schedule do not constitute a guarantee the item will reach the period without
malfunction as the aforementioned factors cannot be controlled by the manufacturer.
WARNING: Use only genuine Textron Aviation Inc., or Textron Aviation Inc.-approved parts obtained from Textron
Aviation Inc. approved sources in connection with the maintenance and repair of Textron Aviation Inc.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 1 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-00 (Rev D0)
airplanes to assure that the airplane is returned to service in a condition at least equal to its original or
properly altered condition. Genuine Textron Aviation Inc. parts are produced and inspected under rigorous
procedures to ensure airworthiness and suitability for use in Textron Aviation Inc. airplane applications
Parts purchased from sources other than Textron Aviation Inc., even though outwardly identical in
appearance, may not have had the required tests and inspections performed, may be different in fabrication
techniques and materials, and may be dangerous when installed in an airplane.
WARNING: Salvaged airplane parts, reworked parts obtained from non-Textron Aviation Inc. sources, or parts,
components, or structural assemblies, the service history of which is unknown or cannot be authenticated,
may have been subjected to unacceptable stresses or temperatures or have other hidden damage not
discernible through routine visual or usual nondestructive testing techniques. This may render the part,
component, or structural assembly, even though originally manufactured by Textron Aviation Inc.,
unsuitable and unsafe for airplane use.
WARNING: Textron Aviation Inc. expressly disclaims any responsibility for malfunctions, failures, damage or injury
caused by use of non-Textron Aviation Inc.-approved parts or procedures.
A.
3.
The time periods for the inspections noted in this schedule are based on normal usage under average environmental
conditions. Airplanes operated for Air Taxi or other than normal operations and airplanes operated in humid tropics, or in cold
damp climates, etc., may need more frequent inspections for wear, corrosion, lubrication, and/or lack of maintenance. Under
these adverse conditions, perform periodic inspections in compliance with this guide at more frequent intervals until the owner
or operator can set his own inspection periods based on the contingencies of field experience.
Scheduled Inspection General Information
A.
Inspection Interval Tolerance
To facilitate scheduling inspections, Textron Aviation Inc. authorizes the following inspection interval tolerances:
(1) Biennial Inspection (Calendar-Month Interval)
(a) A tolerance of ± 12 days per 12 calendar months is allowed, not to exceed a total of 60 calendar days.
EXAMPLE: AN INTERIM INSPECTION, due on Jan 1, 1996, may be accomplished anytime between Dec 21,
1995 and Jan 12, 1996. A COMPLETE INSPECTION, due on Jan 1, 1996, may be accomplished
anytime between Dec 9, 1995 and Jan 24, 1996.
(2) Special Inspection Items - Calendar Date Limited
(a) A tolerance of ±12 days per 12 calendar months is allowed, not to exceed a total of 60 calendar days.
(3) Special Inspection Items - Flight Cycle Limited
(a) A tolerance of ± 10% is allowed.
(4) Special Inspection Items - Hourly Limited
(a) A tolerance of ±10% is allowed.
NOTE:
B.
Tolerances specified by supplier's, DOT regulations or FAA regulations take precedence over
inspection intervals and tolerances authorized by Textron Aviation Inc..
Purpose and Use
(1) The Textron Aviation Inc.-recommended Beech King Air 90 Inspection Program is provided to maintain the Beech King Air
90 airplanes that are utilized by owners and operators on a continuous basis. The complete program must be
accomplished at least one time every 24 calendar months.
NOTE:
Owners/operators wishing to utilize inspection intervals of less than 200 hours may do so without
obtaining Textron Aviation Inc.'s concurrence. Refer to the latest revision of this form for
inspection procedure details to meet 14 CFR 91.409 (f) (3).
(a) Inspection timetables are as follows:
1 Interim Inspection: Must be performed at first 12 months and every 24 months thereafter.
2 Complete Inspection: Must be performed at first 24 months and every 24 months thereafter.
NOTE:
If aircraft flight profile increases above 200 hours in a 24-month period, owner/operator
must convert to the STANDARD or ALTERNATE phase inspection program.
NOTE:
Textron Aviation Inc. recommends that no aircraft exceed 12 months without completing
at least one phase inspection.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 2 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-00 (Rev D0)
3
Special Inspections: Although this inspection program is based on 24-month intervals, there are items which
require more, or less, frequent inspection or whose inspection interval is based on flight time, calendar elapsed
time, or cycles. These unique inspection items and their time intervals are described under SPECIAL
INSPECTIONS (Ref. 05-21-05, 601 or 05-25-05, 601), and should be reviewed prior to commencing any
scheduled inspection.
NOTE:
Textron Aviation Inc.'s recommended Inspection Program in accordance with 14 CFR
91.409 (f) (3) consists of, but is not limited to, inspection items listed in this Inspection
Guide, any applicable Airworthiness Directives issued against the airframe or any
equipment installed therein, conformity to Type Certificate Data Sheet and Airworthiness
Limitations Manual Chapter 04 as applicable.
WARNING: Ascertain that all placards are in place and legible whenever the airplane has been
repainted or touched up after repairs. Replace any placards that have been inadvertently
defaced or removed.
C.
(2) While this guide may be used as an outline, detailed information of the many systems and components in the airplane will
be found in the various sections/chapters of this Maintenance Manual and the Engine Maintenance Manual. Reference to
the Engine Maintenance Manual is to the Pratt & Whitney Canada PT6A-6, -20, -6/C20, -20A, -21 or -28 Maintenance
Manual. It is also recommended that reference be made to the applicable supplier maintenance handbooks, Textron
Aviation Inc. service bulletins, applicable FAA Regulations and supplier bulletins and specifications for torque values,
clearances, settings, tolerances and other requirement. It is the responsibility of the owner or operator to ensure that the
airframe and power plant mechanic inspecting the airplane has access to the previously noted documents as well as to
this inspection guide.
(3) Textron Aviation Inc. issues service information for the benefit of owners and fixed-base operators in the form of two
classes of service bulletins. The first class, MANDATORY Service Bulletins (red border) are changes, inspections and
modifications that could affect safety or crash worthiness. Textron Aviation Inc. considers compliance with these service
bulletins to be mandatory. Textron Aviation Inc. also issues a service bulletin having no border designated as either
RECOMMENDED or OPTIONAL in the compliance section within the bulletin. In the case of a RECOMMENDED Service
Bulletin, Textron Aviation Inc. feels the changes, modifications, improvements or inspections will benefit the owner/operator
and although highly recommended, they are not considered mandatory at the time of issuance. In the case of OPTIONAL
Service Bulletins, the changes, modifications, improvements or inspections compliance s at the owner/operator's
discretion.
(4) In the final analysis it is the responsibility of the owner or operator to ensure that all Textron Aviation Inc. service bulletins
which are pertinent to his particular operation are complied with.
Definitions
(1) The terminology pertaining to the inspection procedures and their use is defined as follows:
(a) Flight Time - Flight time shall mean the total time from the moment the airplane first moves under its own power for
the purpose of flight until the moment it comes to rest at the next point of landing. ("Block-to-block" time).
(b) Maintenance - Means inspection, overhaul, repair, preservations and the replacement of parts, but excludes
preventive maintenance.
(c) Pilot in Command -Pilot in command shall mean the pilot responsible for the operation and safety of the airplane
during the time defined as flight time.
(d) Preventive Maintenance - Means simple or minor preservative operations and the replacement of small standard
parts not involving complex assembly operations.
(e) Time in Service - Time in Service, as used in computing maintenance and inspection time records, is the time from
the moment the airplane leaves the ground until it touches the ground at the end of the flight.
(f) Flight Cycle -A flight cycle is defined as: Engine start-up and increase to full or partial power (as required during a
normal flight), one landing gear retraction and extension and a complete shutdown.
(g) Corrosion - Pitting or a surface breakdown of a material due to chemical or electro-chemical attack by atmosphere,
moisture or other agents.
(h) Wear - Material or part consumed as a result of exposure to operation or usage.
(i) Damaged - Rendered unusable for its intended purpose.
Copyright © Textron Aviation Inc.
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Page 3 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-00 (Rev D0)
(j)
D.
Calendar Time - The time from the date on the "ORIGINAL AIRWORTHINESS CERTIFICATE", FAA Form No.
8100-2, which is issued with each new airplane, to be used as the basis for all TBO or of replacement components.
(k) Special Inspection - Inspection of components or systems based on calendar time, hours or cycles which do not
coincide with the scheduled inspection.
(l) Unscheduled Maintenance Checks - Inspections and checks for damage after operating the airplane in conditions
which could require unscheduled maintenance, i.e. lightning strikes, hard landing, polluted atmospheric conditions,
etc.
Discrepancies
(1) Discrepancies that affect the airworthiness of the airplane will require the necessary corrective action to be accomplished
before the airplane is returned to service.
(2) Discrepancies that do not affect the airworthiness of the airplane may, at the discretion of the owner/operator, be carried
over to the next inspection period. All discrepancies thus carried over should be retained in the ship file until corrected.
(3) Discrepancies which occur during flight should be entered on the "In-Flight Work Sheet" by the pilot in command or another
responsible person.
(4) Forms for the "In-Flight Work Sheet", "Scheduled Inspection Work Sheet", and "Overhaul and Replacement Work Sheet"
are provided at the end of subchapter 05-00-00, 001. These forms may be copied for use during each phase of the
inspection.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 4 of 4
Print Date: Thu Jan 11 11:03:57 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-01 (Rev D0)
1.
BIENNIAL SCHEDULED INSPECTION PROGRAM (INTERIM) - INSPECTION/CHECK
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Biennial Scheduled Inspection Program (Interim)
Owner:
W/O Number :
Date In :
Serial No. :
Date Out:
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to be applied
during start and run of the engine. Refer to the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight Manual for
the engine start and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper operation.
2.
CROSSFEED VALVE - Check for proper operation.
3.
BOOST PUMPS - Check for proper operation.
4.
AUXILIARY FUEL TRANSFER JET PUMPS (LW-1 and After) Check for proper operation.
5.
STARTER-GENERATOR
6.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
7.
ENGINE OIL - Check for proper pressure and temperature
limits.
8.
FUEL QUANTITY GAGES - Check for proper operation.
Copyright © Textron Aviation Inc.
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Page 1 of 5
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-01 (Rev D0)
9.
INTERSTAGE TURBINE TEMPERATURE / INLET
TEMPERATURE - Check for correct limits on engine start.
10. VACUUM SYSTEM - Check for correct limits.
11. PNEUMATIC PRESSURE GAGE - Check for correct pressure.
12. GYRO INSTRUMENTS - Check for erratic or noisy operation.
13. PROPELLERS
a.
Perform low pitch torque check.
76
b.
Perform secondary low pitch stop check. (If installed)
76
14. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
15. PROPELLER SYNCHRONIZER / SYNCHROPHASER - Refer
to FUNCTIONAL TEST and confirm proper synchronization.
61-23-00, 601
61
16. PROPELLER GOVERNOR - Check governor operation
(including feathering and reversing).
17. IDLE RPM - Check for correct rpm (both high and low rpm).
18. AC INVERTERS - Check for proper operation.
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper operation and
cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for proper operation and
cycling.
22. ELECTRICAL SYSTEM - Perform functional checks.
24
23. ENVIRONMENTAL SYSTEM - Check for proper operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation as outlined in the
applicable King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual Supplement.
25. STALL WARNING - Check for proper operation.
26. ENGINE FIRE DETECTORS (If Installed) - Perform system test
according to instructions found in the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight
Manual.
Copyright © Textron Aviation Inc.
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Page 2 of 5
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-01 (Rev D0)
27. ENGINE FIRE EXTINGUISHERS (If Installed) - Perform system
test according to instructions found in the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight
Manual.
28. PRESSURIZATION SYSTEM - Check for proper operation.
NOTE:
Refer to the King Air 90 Pilot's Operating Handbook and
FAA Approved Airplane Flight Manual and perform
system test.
29. CONDITION LEVER - Check for clean shutdown atIDLE-CUTOFF.
30. PITOT TUBE - Check for proper heating at the unit and for
obstructions.
31. LANDING and TAXI LIGHTS - Check for proper operation.
32. OUTBOARD WING LIGHTS (Right and Left) - Check proper
operation of all navigation and strobe (if installed) lights.
33. COCKPIT LIGHTS - Check for proper operation.
34. EFIS COOLING BLOWERS (If installed) - Check for proper
operation.
35. ELECTRIC ELEVATOR TRIM - Check for proper operation.
36. ENGINE and PROPELLER CONTROLS - Check for freedom
of movement, full travel and friction-lock operation.
37. STATIC SYSTEM - Inspect alternate air valve for operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational check.
39. THRESHOLD LIGHT - Check for proper operation.
40. CABIN and COMPARTMENT LIGHTS - Check for proper
operation.
41. PILOT'S and COPILOT'S SEATS and SEAT BELTS - Check
seat adjustment mechanism and shoulder harness inertia reel
for operation.
42. CABIN SEATS and SEAT BELTS - Check seat adjustment
mechanism and shoulder harness inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps (If installed) do not fold too soon
and that they fold properly without interference.
b.
Check CABIN DOOR / CABIN DOOR OPEN annunciator
for proper operation.
c.
Inspect cabin door damper (If installed) for leakage and
proper operation.
44. EMERGENCY EXIT
Copyright © Textron Aviation Inc.
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-01 (Rev D0)
a.
Check emergency release handles and latch mechanism
for proper operation.
b.
Check that latches open and close freely.
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for smoothness
of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS - Check for
proper operation.
47. AILERON (LH and RH) - Check for freedom of movement.
48. AILERON TRIM TAB - Check trim tab actuator for smoothness
of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) - Check the
operation of the heated vents. They should be warm to the
touch.
50. STALL WARNING HEAT - Check for proper operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH and RH) Check flaps for noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper operation.
53. EXTERNAL POWER RELAY - Check for proper operation.
B.
54. ENGINE INERTIAL ANTI-ICER - Check for proper operation
and rigging.
30
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS - Check for
smoothness of operation. Make sure movement is between
inner and outer bushings.
27
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or FLIGHT
TEST - Check for oil leaks, security and attachment of all
components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE BULLETINS Must be reviewed and complied with as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
Ensure Special Inspection requirements are complied
with at the appropriate intervals.
05-21-05, 601
b.
Perform Continuous Corrosion Control Inspection if
required by the environmental conditions encountered.
05-29-00, 601
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
Page 4 of 5
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-01 (Rev D0)
6.
IN-FLIGHT WORKSHEET - All discrepancies noted by the pilot
must be checked and corrected as required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check for proper
operation and make sure ELT is ARMED before returning
airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If Installed)
Make sure all necessary emergency and survival equipment
are installed in the airplane and serviceable.
10. PLACARDS - Determine that all required placards are in place
and legible.
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books are filled out
properly.
2.
Inspection Completed
I certify that the Interim Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE: :
MECHANIC :
CREW CHIEF :
QUALITY CONTROL INSPECTOR :
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 5 of 5
Print Date: Thu Jan 11 11:03:58 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
1.
BIENNIAL SCHEDULED INSPECTION PROGRAM (COMPLETE) - INSPECTION/CHECK
(LJ-1 THRU LJ-1062; LW-1 AND AFTER)
Biennial Scheduled Inspection Program (Complete)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Nose Section
ATA REFERENCE
1.
MECH
INSP
AIR-CONDITIONING COMPRESSOR
a.
Inspect for security of attachment and oil leaks.
21
b.
Inspect drive belt for deterioration, wear and proper
tension.
21
c.
Check for proper compressor oil level if oil leak
indications are present.
12
d.
Inspect the integrity and security of the clutch
assembly. Remove the belt from the compressor.
Inspect for freedom of rotation, bearing roughness
and free play (wobble). Check for corrosion or
evidence of inappropriate wear (belt dust, metal
shavings). Install belt on compressor.
21
2.
NOSE SECTION AREA - Inspect skin, structure and
attaching hardware for wear, damage and corrosion. If
damage or corrosion is found in a given area, check the
adjacent area.
3.
RADOME - Inspect the exterior surface for cracks in the
paint and fiberglass substrate.
4.
COMBUSTION HEATER (LJ-1 thru LJ-501)
a.
Check the gap and condition of the heater spark plug.
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21-40-07, 201
Page 1 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
5.
B.
b.
Check fuel plumbing, pump and regulator for leakage,
damage and security of attachment.
c.
Perform the HEATER FUEL FILTER ELEMENT
CLEANING procedure.
d.
On LJ-1 thru LJ-53 that have complied with Service
Letter 66-4, and on LJ-54 thru LJ-501, check the fuel
heater for operation, condition and attachment.
21
e.
Inspect the heater drain lines for obstructions.
21
f.
Perform the CABIN HEAT OUT WARNING LIGHT
FUNCTIONAL CHECK procedure.
21-40-00, 601
ELECTRIC HEATER (LJ-502 thru LJ-1062, LW-1 and
After) - Inspect the heater, heater elements, associated
wiring and ducting for condition and attachment.
21-41-00, 601
21
21-40-01, 701
Nose Avionics Compartment
ATA REFERENCE
1.
VACUUM REGULATOR VALVE FILTER - Inspect for
blockage.
12
2.
INSTRUMENT AIR FILTER (LJ-1 thru LJ-1846, LJ-1848
thru LJ-1852) - Inspect for cleanliness.
12
3.
AVIONICS EQUIPMENT and RACKS - Inspect for security
of attachment.
4.
AVIONICS COMPARTMENT AREA - Inspect for
corrosion, trapped water and indications of water leakage.
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing,
damage and security of attachment.
6.
C.
DOORS, FASTENERS and SEAL - Inspect seal for
deterioration and doors and latches for proper adjustment
and fit.
MECH
INSP
MECH
INSP
AC43.13-1B/2B
52
Nose Landing Gear Area
ATA REFERENCE
1.
ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing,
damage and security of attachment.
AC43.13-1B/2B
2.
FORWARD EVAPORATOR FILTER - Inspect for
cleanliness.
12
3.
REFERIGERANT LINES, SERVICE VALVES and HIGHPRESSURE RELIEF VALVES - Inspect lines and valves
for leakage, damage, attachment and surface corrosion.
21
4.
NOSE LANDING GEAR AREA - Inspect skin, structure
and attaching hardware for wear, damage and corrosion.
If damage or corrosion is found in a given area, check the
adjacent area.
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
D.
Nose Gear
ATA REFERENCE
1.
2.
a.
Inspect wheel for wear, damage and corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
32
CMM
TIRE
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
SHIMMY DAMPER - Inspect for leaks, security and
attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for cracks,
damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect steering stop
for damage or distortion.
6.
LANDING and TAXI LIGHTS
8.
9.
INSP
WHEEL
3.
7.
MECH
12
CMM
12-20-15, 301
CMM
32
a.
Inspect the lights for broken lenses or bulbs on LJ502 thru LJ-1062; LW-1 and After.
33
b.
Confirm correct focus of landing and taxi lights.
33
NOSE GEAR LOWER DRAG LEG - Remove nose gear
drag brace bolt and inspect lower drag leg hole for
corrosion and wear.
32
NOSE GEAR ACTUATOR - Inspect actuator support
brackets for damage, cracks and loose or missing
fasteners.
32
NOSE GEAR RETRACT AND EXTENTION CHAIN
(Exterior and interior)
a.
Inspect chain for broken links, excessive pin and
link wear, misalignment, rust, corrosion and dirt.
32
b.
Check sprockets for excessive wear and hookshaped teeth.
32
c.
Check chain for proper tension.
32
d.
Check nose gear and nose gear linkage clearance
from electrical wires and obstructions.
32
10. NOSE GEAR COMPONENTS - Inspect all components
and attaching hardware for wear, damage and surface
corrosion.
32
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
E.
11. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
12. STEERING LINKAGE - Inspect nose gear steering
mechanism and attaching hardware for wear, damage
and corrosion.
32
13. NOSE LANDING GEAR STRUT - Check strut for
leakage and correct extension.
32
Flight Compartment
ATA REFERENCE
1.
2.
INSP
WINDSHIELD
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal (Silicone) for
debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal (Polysulfide)
for debonding, cracks or wear.
56
d.
Inspect windshield attachment screws for 20 inchpounds of torque.
56
WINDOWS
a.
Inspect exterior surface of cockpit side windows for
scratches, cracks, chips, excess crazing or any
indication of delamination.
56
Inspect for any contact of the milled edge of the
window with the airframe skin. Correct window
contact by reinstalling and recentering the window in
the airframe opening.
56
Inspect for any damage from paint strippers,
solvents or any unapproved sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for damage and
wear.
25
5.
PORTABLE FIRE EXTINGUISHER - Inspect the bottle for
signs of damage and mount for security of attachment.
26
CMM
6.
SEAT BELTS and SHOULDER HARNESSES - Inspect
seat belts and shoulder harnesses for deterioration or
missing components.
25
BRAKE FLUID RESERVOIR PRESSURE
EQUALIZATION ORIFICE - Clean and flush orifice of
contaminants.
32-40-03, 701
b.
c.
7.
MECH
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
8.
FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron cable tension:
TEMPERATURE: _°F
CONTROL COLUMN INTERCONNECT CABLE TENSION:
1/8 IN. AILERON CABLE TENSION:
LEFT ___ RIGHT___
9.
27
HEATING SYSTEM
a.
Check all ducts for damage and deterioration.
b.
Check bleed air ducts (LJ-502 thru LJ-1062; LW-1
and After) for damage, insulation and adequate
clearance of electrical wiring and control cables.
CAUTION:
Prior to installing pilot's compartment floor
panels, visually inspect the entire length of the
elevator control cable in this area to assure
adequate clearance between the cable and
electrical wiring, bleed air ducts, bleed air duct
clamps, and structural components to prevent
chaffing and wear.
21
21
10. FLIGHT COMPARTMENT AREA - Inspect skin, structure,
seats and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found in a given
area, check the adjacent area.
11. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
CAUTION:
Prior to installing pilot's compartment floor panels,
visually inspect the entire length of the elevator
control cable in this area to make sure that there is
adequate clearance between the cable and
electrical wiring, bleed air ducts, bleed air duct
clamps, and structural components to prevent
chaffing and wear.
AC43.13-1B/2B
12. RUDDER PEDALS
a.
Inspect rudder pedals for wear, clearance and
attachment.
27
b.
Inspect rudder pedal linkage for wear, damage,
attachment and operation.
27
13. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacements.
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27
20-04-00, 201
Page 5 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
b.
c.
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
On LJ-502 thru LJ-1062 and LW-1 thru LW-347,
visually inspect the rudder, elevator and trim control
cables between FS 116.00 and FS 147.60. Check
for chafing, fraying, broken strands and adequate
clearance. Pay particular attention to the clearance
where the cable passes the bleed air duct and any
adjacent electrical wiring or components.
CAUTION:
The travel of the elevator cable in this area is
not sufficient to expose the cable for a
thorough inspection without removal of the
pilot's seat, floorboards, reverse current relay
and/or the generator line contactor panel. Upon
installation of removed components, inspect all
adjacent electrical wiring and components for
adequate clearance with control cables.
27
20-04-00, 201
14. BRAKE SYSTEM - Inspect brake system components
and plumbing for leakage and attachment.
32
15. INSTRUMENT PANEL, PLUMBING and WIRING Inspect instrument panel, subpanels, placards, shock
mounts and instrument plumbing for damage, attachment,
chafing and hoses for hardness or cracks.
31
16. CONTROL COLUMN
a.
Inspect for wear, damage, corrosion, attachment
and operation.
27
b.
Inspect control wheel adapter for cracks in the weld
area of adapter on forward side of the control wheel.
27
c.
Inspect control wheel switches for condition and
security of attachment.
27
17. PEDESTAL
a.
b.
Inspect pedestal components and plumbing for
damage, attachment, chaffing and hoses for
hardness or cracks.
Perform the CONDITION CONTROL CATCH GATE
INSPECTION procedure.
31
76-17-03, 601
18. PRESSURIZATION CONTROLLER
a.
Inspect for security of attachment, plumbing and
wiring for damage and connection security.
21
b.
Inspect filter in controller assembly located within the
pedestal.
21
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
19. ACCESS DOORS - Inspect for fit and attachment.
20. HEATED WINDSHIELD - Inspect windshield antistatic
coating and tab bonding.
06-50-00, 001
56
21. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for corrosion.
b.
Inspect relief tube outlet area for corrosion.
22. ELECTRICAL LOAD DISTRIBUTION - Perform
inspections of the DUAL BUS FEEDER and FUEL
PANEL DIODES.
24-51-00, 601
23. Deleted, refer to item 27.
24. UPHOLSTERY PANELS - Inspect for security of
attachment.
25. EMERGENCY LANDING GEAR EXTENSION - Inspect
the emergency extension handle assembly and linkage
from the handle to the emergency extension pump for
proper installation, wear and security of attachment.
32
26. ENVIRONMENTAL SYSTEM
a.
Inspect ducts for condition and security of
installation.
21
b.
Check ducts for evidence of thermal leaks and/or
degradation, such as discoloration of duct insulator,
adjacent structure or components.
21
Physically inspect ducts by touching ducts, checking
for thermal deterioration, deformation of the ducts,
and proper connection at the joints.
21
c.
d.
Perform the BLEED AIR BYPASS VALVE
OPERATIONAL CHECK procedure.
21-41-07, 601
e.
Perform the FUNCTIONAL TEST OF THE DUCT
SENSE ELEMENT procedure.
21-61-00, 501
f.
Perform the FUNCTIONAL TEST OF THE CABIN
TEMPERATURE CONTROL SYSTEM procedure.
21-61-00, 501
27. VENTILATION BLOWER - Inspect for dirt, grease,
moisture and security of attachment. Rotate blower by
hand and ensure that it rotates freely. Check for noise or
evidence of worn bearings. Turn on the blower and check
for noise or vibration.
F.
21
Cabin Section
ATA REFERENCE
1.
WINDOWS - Inspect exterior surface of windows for
deep scratches, cracks, chips and excessive crazing or
other damage.
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MECH
INSP
56
Page 7 of 34
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
2.
ROTATING or FLASHING BEACON - Inspect for cracked
or broken lenses.
3.
ACCESS DOORS - Inspect for fit and attachment.
4.
OUTFLOW and SAFETY VALVES
06-50-00, 001
a.
Drain outflow valve control line.
21
b.
Inspect plumbing and components for attachment.
21
c.
Clean and inspect safety valve screen. Perform the
SAFETY VALVE FILTER CLEANING procedure.
12-20-21, 701
d.
Clean and inspect poppet and seat of both valves.
Perform the appropriate OUTFLOW AND SAFETY
VALVE CLEANING procedure.
12-20-21, 701
Perform functional test of outflow and safety valves.
21
e.
5.
SEAT TRACKS - Inspect seat tracks for damage and
wear.
6.
SEATS, SEAT BELTS and SHOULDER HARNESSES
7.
33
25
a.
Inspect seat belt and shoulder harness attachment
post for deterioration or missing components.
25-20-01, 601
b.
Inspect shoulder harness attachment post for
cracked, worn, brittle or missing grommet (If
installed).
25-20-01, 601
OXYGEN SYSTEM
a.
Test all outlets and masks for oxygen flow.
35
b.
Inspect oxygen system installation for damage and
security of attachment.
35
8.
TOILET (If Installed) - Inspect for spillage and leakage
below the toilet.
9.
CABIN ENTRANCE DOOR
38
a.
Inspect the door seal for cuts, abrasions and
security of attachment.
52
b.
Inspect door seal solenoid valve and pressure
regulator valve for security and electrical connection.
52
c.
Inspect the cabin door support cables for wear,
damage and security.
52
d.
Inspect door latching mechanism and cables for
damage, deterioration and security of attachment.
52
53
e.
Inspect upper latch hooks and retaining pins for
rigging, wear and damage. Replace pin at 10%
diameter wear. (Pin removal required).
52
Inspect upper latch hooks for proper tension.
52
f.
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
g.
On LJ-1 thru LJ-1011, except LJ-986 and LJ-996,
inspect the forward and aft frame for cracks in area
of bayonet roller attach screws. If cracks are found,
inspect adjacent structure for damage.
52
53
h.
Inspect the CABIN DOOR / CABIN DOOR OPEN
annunciator switch spring.
52
10. LANDING GEAR BRAKE LINES - Inspect for leaks,
damage and security of attachment.
32
11. PORTABLE FIRE EXTINGUISHER - Inspect bottle for
damage and security of attachment.
26-21-00, 001
CMM
12. AVIONICS EQUIPMENT and RACKS (If Installed) Inspect avionics equipment and racks for security of
attachment.
53
13. BULKHEADS - Inspect for water traps.
53
14. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
15. FLAP MOTOR and DRIVES - Inspect for damage and
attachment.
27
16. BELLY DRAIN VALVES - Inspect for possible
obstructions.
53
17. CABIN WINDOW ATTACH FRAMES - Perform
inspection and check for looseness of window attach
frames.
56
18. PNEUMATIC PRESSURE REGULATOR, VACUUM
EJECTOR and DEICER DISTRIBUTION VALVE Inspect equipment and plumbing for security.
21
19. CONTROL CABLE SEALS - Inspect for damage,
security, cleanliness and lubrication.
27
20. AUTOPILOT COMPONENTS - Inspect components for
security of attachment.
22
21. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for corrosion.
38
20-09-00, 201
b.
Inspect relief tube outlet area for corrosion.
38
20-09-00, 201
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
22. ANTENNAS - Inspect all external antennas for leading
edge erosion and condition of base seals.
23
23. CABIN DOORS and EMERGENCY EXITS
a.
b.
Inspect skin, structure and attaching hardware for
wear, damage and corrosion. If damage or
corrosion is found in a given area, check the
adjacent area.
AC43.13-1B/2B
Inspect corner areas of emergency exit (removed)
for cracks and abrasion in area of curvature
between seal and outer face of exit.
52
24. EMERGENCY EXITS
a.
Inspect latches for damage and check all moving
parts for proper operation.
52
b.
Check for proper latch adjustment and seal of
closed door.
52
25. ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing,
damage and security of attachment.
AC43.13-1B/2B
26. UPHOLSTERY PANELS - Inspect for security of
attachment.
27. CABIN SECTION AREA - Inspect skin, structure, seats
and attaching hardware for wear, damage and corrosion.
If damage or corrosion is found in a given area, check the
adjacent area.
28. PRESSURIZATION DUCTS - Inspect for security of
attachment.
21
29. FLAPPER VALVE (LJ-502 thru LJ-1062; LW-1 and
After) - Check for proper operation and excessive air
noise.
21
30. ENVIRONMENTAL SYSTEM
a.
Inspect ducts for condition and security of
installation.
21
b.
Check ducts for evidence of thermal leaks and/or
degradation, such as discoloration of duct insulator,
adjacent structure or components.
21
Physically inspect ducts by touching ducts, checking
for thermal deterioration, deformation of the ducts,
and proper connection at the joints.
21
c.
31. FLUORESCENT LIGHT POWER SUPPLIES - (LJ-654,
LJ-674 thru LJ-979, LW-134, LW-157 thru LW-347) Inspect the edge card connector and power supply for
contamination and corrosion. Make sure the edge card is
clean and the plug that slips over the edge card is tight.
G.
Rear Fuselage and Empennage
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and inspect.
2.
ELT BATTERY
INSP
53
a.
Inspect for leakage, corrosion or loose connections.
25
b.
Determine remaining useful life.
25
3.
NAVIGATION LIGHTS and ROTATING (Flashing)
BEACONS - Inspect for broken or cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security of
attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the drain holes in
the bottom of the ventral fin for obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration, damage and
attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect the drain
holes for obstructions.
27
8.
STATIC WICKS
9.
MECH
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
EMPENNAGE and CONTROL SURFACES
a.
Check elevator trim tab free play.
27
b.
Check rudder trim tab free play.
27
c.
Inspect elevator and rudder hinge brackets and their
spar attach areas.
27
d.
Inspect skin, structure and attaching hardware for
wear, damage and corrosion. If damage or
corrosion is found in a given area check the
adjacent area.
53
10. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
11. AVIONICS and AUTOPILOT EQUIPMENT and RACKS Inspect for security, corrosion and signs of water
leakage.
12. VERTICAL STABILIZER - Inspect front and rear spars of
the vertical stabilizer for loose or missing rivets or
fasteners.
55
13. CONTROL CABLE SEALS - Inspect for deterioration,
security, cleanliness and lubrication.
27
14. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
a.
b.
H.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
15. FLIGHT CONTROL CABLE TENSION - Inspect and
record elevator, elevator tab, rudder and rudder tab cable
tension:
TEMPERATURE:________ °F
ELEVATOR CABLE TENSION: UP_______DOWN_______
ELEVATOR TAB CABLE TENSION:___________________
RUDDER CABLE TENSION: LEFT_______RIGHT_______
RUDDER TAB CABLE TENSION: _____________________
27
16. OXYGEN SYSTEM - Inspect plumbing for security of
attachment.
35
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES - Determine that
the drain holes are open in the wing center section and
outboard wing upper attachment fittings.
SIRM
3.
4.
INSP
LIGHTS
a.
Inspect the navigation and recognition (if installed)
lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked lenses,
if installed.
33
c.
Inspect the landing lights for broken or cracked
lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect the exterior of the wing for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect
the visible fuel cap packing or flexibility, splits,
cracks, or distortion.
28
Inspect exterior openings of vents for obstructions.
28
c.
5.
MECH
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
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30
Page 12 of 34
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit
and attachment.
7.
STATIC WICKS
8.
06-50-00, 001
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the CHECKING
AILERON TAB FREE PLAY procedure.
27-10-15, 601
9.
FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron and aileron tab cable tension:
TEMPERATURE:_ °F
3/16" AILERON CABLE TENSION: LEFT__
AILERON TAB CABLE TENSION: ___
27
10. LEFT-HAND OUTBOARD WING AREA - Inspect skin,
structure, and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found in a given
area, check the adjacent area (Ref. King Air Series
Structural Inspection and Repair Manual, 57-13-01, 201).
SIRM
11. LEFT-HAND OUTBOARD FLAP - Inspect skin, structure
and attaching hardware for wear, damage and corrosion.
If damage or corrosion is found in a given area, check the
adjacent area.
27
12. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
13. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
14. FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
b.
Inspect flap tracks for wear.
15. FUEL PLUMBING - Inspect for leaks, chafing or damage
and attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
27
27-50-01, 601
28
Page 13 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
I.
16. HINGED ACCESS DOORS (Inside wing access panels
13 and 14) - Inspect for cracks or damage to hinge and
fasteners.
06-50-00, 001
17. INTEGRAL FUEL TANK (LW-1 and After) - Inspect the
exterior surfaces of the integral tank access doors for
leaks.
06-50-00, 001
28
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
3.
Inspect the exterior of the center section for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect
the visible fuel cap packing for flexibility, splits,
cracks, or distortion.
28
CENTER SECTION - Inspect Aux Fuel Cell inboard
probe for security, leaks, corrosion and general
condition. Removal of the inboard probe cover required.
Defuel the effected tank as required to remove the
inboard probe.
28
While fuel cell area is open, inspect fuel cell for
condition, cleanliness and security. Inspect internal
plumbing for security of attachment and general
condition.
28
NACELLE FUEL CELL and PROBE - Inspect for
microbiological sludge buildup. If sludge is found, inspect
all fuel probes, tanks, fuel lines and replace the fuel filter.
Clean as required. If needed, use BIOBOR JF or Kathon
FP 1.5 additive.
28
12
5.
ACCESS DOORS (Inspection Panels) - Inspect for fit
and attachment.
06-50-00, 001
6.
FUEL PUMPS - Inspect the pumps for leaks and security
of attachment.
28
7.
LEFT-HAND WING CENTER SECTION AREA - Inspect
wing center section and inboard flap, skin structure and
attaching hardware for wear, damage and corrosion. If
damage is found in a given area, check the adjacent
area.
SIRM
4.
8.
INSP
28
a.
a.
MECH
FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
27
b.
Inspect flap tracks for wear.
27
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 14 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
9.
LEADING EDGE and NACELLE FUEL PLUMBING Inspect fuel plumbing for leaks, damage and security of
attachment.
28
10. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
11. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage and proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
12. BLEED AIR BYPASS VALVE (LJ-502 thru LJ-1062; LW1 and After) - Check bleed air valve at heat exchanger for
operation of linkage to butterfly valve and operation of
actuator motor.
21
13. SUPERCHARGER MOTOR - (LJ-1 thru LJ-113 except
LJ-76) - Check Hydraulic Drive system pressure.
21
14. SUPERCHARGER DUCTS and FIREWALL
PRESSURIZATION SHUTOFF VALVE (LJ-1 thru LJ501)
J.
a.
Check supercharger and ducts for condition and
attachment.
21
b.
Inspect firewall pressurization shutoff valve for
condition and freedom of operation.
21
15. SUPERCHARGER MOTOR (LJ-1 thru LJ-113 except LJ76) - Check for leaks and general condition.
21
16. FLOW CONTROL VALVE - (LJ-1 thru LJ-501) - Inspect
valve and associated equipment ducts for damage,
deterioration and attachment.
21
17. SILENCER (LJ-1 thru LJ-501) - Check for deterioration,
damage and security of attachment.
21
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
MECH
INSP
WHEELS
a.
Inspect wheels for wear, damage and corrosion.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
CMM
Page 15 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
b.
CMM
2.
BRAKES - Inspect brake discs, linings and plumbing for
wear damage, leaks, corrosion and security of all
components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and correct
inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT - Check
strut for leaks and proper extension.
12
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage and
proper routing and security of attachment.
AC43.13-1B/2B
6.
7.
8.
K.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
MAIN LANDING GEAR ACTUATOR
a.
Inspect actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or missing
rivets.
32
c.
Inspect actuators for leakage of internal lubricant.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive wear.
CMM
b.
Inspect for security of attach fittings.
32
c.
Inspect downlock bolts for proper torque (finger-tight
and safety-wired).
CMM
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect wheel well and
gear door structure, all components and attaching
hardware for wear, damage and corrosion. If damage or
corrosion is found, check the adjacent area.
32
Left-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice system
(spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall filter
for evidence of foreign matter, corrosion or
microbiological growth in the fuel system. If any
microbiological growth is found, use BIOBOR JF or
Kathon FP 1.5 additive.
12
3.
MECH
INSP
PROPELLERS
a.
Inspect for damage and attachment (spinner
removal required).
Copyright © Textron Aviation Inc.
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61
Page 16 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between the
brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct adjustment,
evidence of binding and security of attachment.
76
e.
Inspect mechanical feedback ring, stop rods and
springs for damage.
61
76
4.
ENGINE OIL FILTER - Inspect for metal particles.
5.
INERTIAL ENGINE ANTI-ICER
a.
Check vane(s) for freedom of movement and correct
travel. Lubrication of linkage and vane hinges may
be necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect plumbing,
valve, actuator and limit switches for damage,
leakage, operation and security of attachment.
30
On LJ-125, LJ-170 thru LJ-241 and airplanes With
Kit 90-4015 installed, replace or bake dryer
cartridge. Check main and standby actuator motors
and limit switches for operation and correct
adjustment.
12-20-05, 301
30
On LJ-242 thru LJ-1062, LW-1 and After and
airplanes With Kit 90-9017 installed, check the
push-pull control for damage, security of attachment,
freedom of movement and full travel.
12
30
c.
d.
6.
7.
P&W
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26-20-05, 501
MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal particles
and damage. For LJ-1 thru LJ-672 and LW-1 thru
LW-154 With Kits 100-9011-1 or -3 installed, LJ637 thru LJ-691, LW-155 thru LW-190, perform the
MAGNETIC CHIP DETECTOR 25-HOUR
INSPECTION procedure. For LJ-692 thru LJ-1062
and LW-191 and After, or prior serials With Kit 1009013-1 installed, perform the MAGNETIC CHIP
DETECTOR INSPECTION procedure.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
12
79-30-05, 401
Page 17 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
b.
8.
9.
Check light in annunciator panel for proper
operation. For LJ-692 thru LJ-1062, LW-191 and
After, or prior serials With Kit 100-9013-1 installed,
perform the MAGNETIC CHIP DETECTOR
ANNUNCIATOR TEST procedure.
12-10-03, 301
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT Inspect for fretting and/or corrosion when replacing outlet
filter.
P&W
COWLING - Remove entire cowling and inspect skin,
structure and attaching hardware for wear, damage and
corrosion.
71
10. OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
79
b.
Inspect drain plug for leakage, security and safety
wire.
79
11. AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
71
12. FIRESEALS - Inspect for condition.
71
13. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage and
corrosion.
78
b.
Inspect the exhaust system and visible portions of
the power turbine for burning, distortion, damage
and cracks.
P&W
14. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for
binding, stiff operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and safeties
for corrosion, damage and attachment.
NOTE:
Special attention should be made to the
cambox.
c.
Inspect control cables for damage such as crimps,
cuts, abrasions or tight bends. If exterior covering is
ruptured, perform leak test.
76
76
12
15. CONTROL CABLE BOOTS - Inspect the control cable
boots for excessive compression, twist, wear or aging
which could cause binding.
76
16. STARTER-GENERATOR - Inspect one set of brushes for
indications of excessive wear or damage (determine
wear by observing diagonal groove on brush).
24-30-05, 601
17. ENGINE
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Page 18 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
a.
Inspect fuel nozzles per engine manufacturer's
manual.
P&W
b.
Inspect engine in accordance with the instructions
found in the engine manufacturer's manual.
P&W
18. IGNITION SYSTEM
a.
b.
c.
d.
IGNITION GLOW PLUGS (LJ-1 thru LJ-922 and LW1 thru LW-388 Without Kit 100-9014-1 installed) Inspect glow plugs.
P&W
IGNITION REGULATOR BOX (LJ-1 thru LJ-922 and
LW-1 thru LW-388 Without Kit 100-9014-1 installed)
P&W
1.
Inspect regulator box and electrical harness for
damage and security of attachment.
P&W
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
SPARK IGNITER PLUGS (LJ-1 thru LJ-922, LW-1
thru LW-388 With Kit 100-9014-1; LJ-923 and After;
LW-339 and After) - Inspect the igniter plugs as
described in the engine maintenance manual.
P&W
IGNITION EXCITER (LJ-1 thru LJ-922, LW-1 thru
LW-388 With Kit 100-9014-1; LJ-923 and After;
LW-339 and After)
P&W
1.
Inspect exciter and electrical harness for
damage and security of attachment.
P&W
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
19. FUEL RECOVERY SYSTEM
a.
b.
FUEL DRAIN COLLECTOR SYSTEM (LJ-1 thru LJ641 With Kit 100-9008-1S; LW-1 thru LW-123 With
Kit 100-9008-3S; LJ-642 thru LJ-900; LW-124 thru
LW-333).
1.
Check tank, pump, pump filter and plumbing for
leaks and security of attachment.
71
2.
Perform a leak check on the collector tank.
71
3.
Check wiring to pump and tank float switch for
damage and security of attachment.
71
4.
Check pump for proper operation.
71
FUEL PURGE (LJ-901 thru LJ-1062; LW-334 and
After)
1.
Remove fuel purge system air tank and
inspect. Clean as required.
71
2.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
Copyright © Textron Aviation Inc.
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Page 19 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
20. ENVIRONMENTAL BLEED AIR FLOW CONTROL UNIT
(LJ-502 thru LJ-1062, LW-1 and After) - Inspect valve and
associated equipment, electrical wiring and ducts for
damage, security of connections and attachment.
21
21. INDUCTION SYSTEM and COMPRESSOR INLET Inspect the air inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet screen
and inspect the compressor inlet area, struts, first stage
blades and vanes for dirt deposits, corrosion, erosion,
cracks and damage by foreign objects.
P&W
22. HIGH PRESSURE FUEL PUMP FILTERS - Inspect the
engine-driven high pressure fuel pump filters.
P&W
23. ENGINE TRUSS MOUNT ASSEMBLY
a.
b.
Inspect for cracks, dents, chafing and corrosion.
Special attention should be made to areas around
clamps.
71
Inspect vibration isolators (mounts) for deterioration,
damage and attachment.
71
24. ENGINE FIRE DETECTION SYSTEM (If installed) Check all fire detectors for sensitivity and continuity.
26
25. AUTOFEATHER and AUTOIGNITION PRESSURE
SWITCHES - (If installed) Inspect security of attachment,
leakage and electrical connection for security.
61
74
26. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of electrical
connectors and wiring.
61
27. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical connectors
and wiring.
61
28. SUPERCHARGER GEARBOX (LJ-1 thru LJ-501) Check the gearbox for leaks and fill gearbox as required.
12
29. SUPERCHARGER HYDRAULIC PUMP (LJ-1 thru LJ113 except LJ-76) - Check for leaks and general
condition.
21
30. SUPERCHARGER HYDRAULIC RESERVOIR (LJ-1 thru
LJ-113 except LJ-76)
L.
12-10-04, 301
a.
Check fluid level.
b.
After airplane has stood idle for 4 to 5 hours, check
system for leakage by loosening the cap on the
reservoir; trapped air indicates the system is free of
leakage.
21
31. OIL PRESSURE SNUBBER (P/N 3R1) with porous-type
element (LJ-572 thru LJ-752; LW-39 thru LW-262) Clean element.
12
Right-Hand Outboard Wing
Copyright © Textron Aviation Inc.
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Page 20 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES - Determine that
the drain holes are open in the wing center section and
outboard wing upper attachment fittings.
SIRM
3.
4.
INSP
LIGHTS
a.
Inspect the navigation and recognition (if installed)
lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked lenses,
if installed.
33
c.
Inspect the landing lights for broken or cracked
lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect the exterior of the wing for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect
the visible fuel cap packing or flexibility, splits,
cracks, or distortion.
28
Inspect exterior openings of vents for obstructions.
28
c.
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit
and attachment.
7.
STATIC WICKS
8.
MECH
30
06-50-00, 001
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the CHECKING
AILERON TAB FREE PLAY procedure.
27
9.
FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron and aileron tab cable tension:
TEMPERATURE:________ °F
3/16" AILERON CABLE TENSION: RIGHT_______________
27
10. RIGHT-HAND OUTBOARD WING AREA - Inspect skin,
structure, and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found in a given
area, check the adjacent area (Ref. King Air Series
Structural Inspection and Repair Manual, 57-13-01, 201).
SIRM
11. RIGHT-HAND OUTBOARD FLAP - Inspect skin,
structure and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found in a given
area, check the adjacent area.
27
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 21 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
12. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
13. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
14. FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
b.
Inspect flap tracks for wear.
27
27-50-01, 601
15. FUEL PLUMBING - Inspect for leaks, chafing or damage
and attachment.
28
16. HINGED ACCESS DOORS (Inside wing access panels
13 and 14) - Inspect for cracks or damage to hinge and
fasteners.
06-50-00, 001
17. INTEGRAL FUEL TANK (LW-1 and After) - Inspect the
exterior surfaces of the integral tank access doors for
leaks.
28
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
2.
FUEL TANKS and VENTS
3.
Inspect the exterior of the center section for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect
the visible fuel cap packing for flexibility, splits,
cracks, or distortion.
28
Inspect the exterior openings of the vents for
obstructions.
28
CENTER SECTION - Inspect Aux Fuel Cell inboard probe
for security, leaks, corrosion and general condition.
Removal of the inboard probe cover required. Defuel the
effected tank as required to remove the inboard probe.
28
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
INSP
28
a.
c.
MECH
Page 22 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
a.
4.
While fuel cell area is open, inspect fuel cell for
condition, cleanliness and security. Inspect internal
plumbing for security of attachment and general
condition.
28
NACELLE FUEL CELL and PROBE - Inspect for
microbiological sludge buildup. If sludge is found, inspect
all fuel probes, tanks, fuel lines and replace the fuel filter.
Clean as required. If needed, use BIOBOR JF or Kathon
FP 1.5 additive.
28
12
5.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
06-50-00, 001
6.
BATTERY
a.
Service as required.
12
b.
Remove battery and inspect the battery box, cables
and vent tubes for deterioration or obstructions.
24
7.
FUEL PUMPS - Inspect the pumps for leaks and security
of attachment.
28
8.
RIGHT-HAND WING CENTER SECTION AREA - Inspect
wing center section and inboard flap, skin structure and
attaching hardware for wear, damage and corrosion. If
damage is found in a given area, check the adjacent area.
SIRM
9.
FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
27
b.
Inspect flap tracks for wear.
27
10. LEADING EDGE and NACELLE FUEL PLUMBING Inspect fuel plumbing for leaks, damage and security of
attachment.
28
11. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
Inspect control system cables, pulleys and associated
equipment for wear, cracks, breaks, attachment,
alignment, clearance and proper operation. Replace
cables that have more than three broken wires in any
given three-foot cable length or have evidence of
corrosion.
12. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage and proper routing of wire bundles and
security of attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
27
20
27
20-04-00, 201
AC43.13-1B/2B
Page 23 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
13. BLEED AIR BYPASS VALVE (LJ-502 thru LJ-1062; LW-1
and After) - Check bleed air valve at heat exchanger for
operation of linkage to butterfly valve and operation of
actuator motor.
N.
21
Right-Hand Main Landing Gear Area
ATA REFERENCE
1.
Inspect wheels for wear, damage and corrosion.
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
CMM
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and correct
inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT - Check
strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage and
proper routing and security of attachment.
AC43.13-1B/2B
8.
O.
a.
BRAKES - Inspect brake discs, linings and plumbing for
wear damage, leaks, corrosion and security of all
components.
7.
INSP
MECH
INSP
WHEELS
2.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Inspect actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or missing
rivets.
32
c.
Inspect actuators for leakage of internal lubricant.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive wear.
CMM
b.
Inspect for security of attach fittings.
32
c.
Inspect downlock bolts for proper torque (finger-tight
and lockwired).
CMM
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect wheel well and
gear door structure, all components and attaching
hardware for wear, damage and corrosion. If damage or
corrosion is found, check the adjacent area.
32
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice system
(spinner removal required).
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
30
CMM
Page 24 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
2.
3.
FUEL FILTERS and SCREENS - Inspect the firewall
filter for evidence of foreign matter, corrosion or
microbiological growth in the fuel system. If any
microbiological growth is found, use BIOBOR JF or
Kathon FP 1.5 additive.
PROPELLERS
a.
Inspect for damage and attachment (spinner
removal required).
61
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between the
brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct adjustment,
evidence of binding and security of attachment.
76
e.
Inspect mechanical feedback ring, stop rods and
springs for damage.
61
76
4.
ENGINE OIL FILTER - Inspect for metal particles.
5.
INERTIAL ENGINE ANTI-ICER
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
On LJ-76, LJ-114 thru LJ-241, inspect plumbing,
valve, actuator and limit switches for damage,
leakage, operation and security of attachment.
30
On LJ-125, LJ-170 thru LJ-241 and airplanes With
Kit 90-4015 installed, replace or bake dryer
cartridge. Check main and standby actuator motors
and limit switches for operation and correct
adjustment.
12-20-05, 301
30
On LJ-242 thru LJ-1062, LW-1 and After and
airplanes With Kit 90-9017 installed, check the
push-pull control for damage, security of
attachment, freedom of movement and full travel.
12
30
d.
7.
P&W
a.
c.
6.
12
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26
MAGNETIC CHIP DETECTOR (If Installed)
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 25 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
a.
b.
8.
9.
Remove and visually inspect plug for metal particles
and damage. For LJ-1 thru LJ-672 and LW-1 thru
LW-154 With Kits 100-9011-1 or -3 installed, LJ637 thru LJ-691, LW-155 thru LW-190, perform the
MAGNETIC CHIP DETECTOR 25-HOUR
INSPECTION procedure. For LJ-692 thru LJ-1062
and LW-191 and After, or prior serials With Kit 1009013-1 installed, perform the MAGNETIC CHIP
DETECTOR INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. For LJ-692 thru LJ-1062, LW-191 and
After, or prior serials With Kit 100-9013-1 installed,
perform the MAGNETIC CHIP DETECTOR
ANNUNCIATOR TEST procedure.
12-10-03, 301
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT Inspect for fretting and/or corrosion when replacing outlet
filter.
P&W
COWLING - Remove entire cowling and inspect skin,
structure and attaching hardware for wear, damage and
corrosion.
71
10. OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
79
b.
Inspect drain plug for leakage, security and safety
wire.
79
11. AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
12. FIRESEALS - Inspect for condition.
71
13. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage and
corrosion.
78
b.
Inspect the exhaust system and visible portions of
the power turbine for burning, distortion, damage
and cracks.
P&W
14. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for
binding, stiff operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and safeties
for corrosion, damage and attachment.
NOTE:
Special attention should be made to the
cambox.
c.
Inspect control cables for damage such as crimps,
cuts, abrasions or tight bends. If exterior covering is
ruptured, perform leak test.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
76
76
76
Page 26 of 34
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King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
15. CONTROL CABLE BOOTS - Inspect the control cable
boots for excessive compression, twist, wear or aging
which could cause binding.
76
16. STARTER-GENERATOR - Inspect one set of brushes
for indications of excessive wear or damage (determine
wear by observing diagonal groove on brush).
24-30-05, 601
17. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's
manual.
P&W
b.
Inspect engine in accordance with the instructions
found in the engine manufacturer's manual.
P&W
18. IGNITION SYSTEM
a.
b.
c.
d.
IGNITION GLOW PLUGS (LJ-1 thru LJ-922 and
LW-1 thru LW-388 Without Kit 100-9014-1
installed) - Inspect glow plugs.
P&W
IGNITION REGULATOR BOX (LJ-1 thru LJ-922 and
LW-1 thru LW-388 Without Kit 100-9014-1
installed)
P&W
1.
Inspect regulator box and electrical harness for
damage and security of attachment.
P&W
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
SPARK IGNITER PLUGS (LJ-1 thru LJ-922, LW-1
thru LW-388 With Kit 100-9014-1; LJ-923 and
After; LW-339 and After) - Inspect the igniter plugs
as described in the engine maintenance manual.
P&W
IGNITION EXCITER (LJ-1 thru LJ-922, LW-1 thru
LW-388 With Kit 100-9014-1; LJ-923 and After;
LW-339 and After)
P&W
1.
Inspect exciter and electrical harness for
damage and security of attachment.
P&W
2.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
19. FUEL RECOVERY SYSTEM
a.
FUEL DRAIN COLLECTOR SYSTEM (LJ-1 thru
LJ-641 With Kit 100-9008-1S; LW-1 thru LW-123
With Kit 100-9008-3S; LJ-642 thru LJ-900; LW-124
thru LW-333)
1.
Check tank, pump, pump filter and plumbing
for leaks and security of attachment.
71
2.
Perform a leak check on the collector tank.
71
3.
Check wiring to pump and tank float switch for
damage and security of attachment.
71
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 27 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
4.
b.
Check pump for proper operation.
71
FUEL PURGE (LJ-901 thru LJ-1062; LW-334 and
After)
71
1.
Remove fuel purge system air tank and
inspect. Clean as required.
71
2.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
20. ENVIRONMENTAL BLEED AIR FLOW CONTROL UNIT
(LJ-502 thru LJ-1062, LW-1 and After) - Inspect valve
and associated equipment, electrical wiring and ducts
for damage, security of connections and attachment.
21
21. INDUCTION SYSTEM and COMPRESSOR INLET Inspect the air inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet
screen and inspect the compressor inlet area, struts, first
stage blades and vanes for dirt deposits, corrosion,
erosion, cracks and damage by foreign objects.
P&W
22. HIGH PRESSURE FUEL PUMP FILTERS - Inspect the
engine-driven high pressure fuel pump filters.
P&W
23. ENGINE TRUSS MOUNT ASSEMBLY
a.
Inspect for cracks, dents, chafing and corrosion.
Special attention should be made to areas around
clamps.
71
Inspect vibration isolators (mounts) for
deterioration, damage and attachment.
71
24. ENGINE FIRE DETECTION SYSTEM (If installed) Check all fire detectors for sensitivity and continuity.
26
25. AUTOFEATHER and AUTOIGNITION PRESSURE
SWITCHES - (If installed) Inspect security of attachment,
leakage and electrical connection for security.
61
74
26. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of electrical
connectors and wiring.
61
27. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical connectors
and wiring.
61
28. SUPERCHARGER GEARBOX (LJ-1 thru LJ-501) Check the gearbox for leaks and fill gearbox as required.
12
29. SUPERCHARGER HYDRAULIC PUMP (LJ-1 thru LJ113 except LJ-76) - Check for leaks and general
condition.
21
b.
30. SUPERCHARGER HYDRAULIC RESERVOIR (LJ-1
thru LJ-113 except LJ-76)
a.
Check fluid level.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
12-10-04, 301
Page 28 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
After airplane has stood idle for 4 to 5 hours, check
system for leakage by loosening the cap on the
reservoir; trapped air indicates the system is free of
leakage.
21
31. OIL PRESSURE SNUBBER (P/N 3R1) with porous-type
element (LJ-572 thru LJ-752; LW-39 thru LW-262) Clean element.
12
b.
P.
Landing Gear Retraction
ATA REFERENCE
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly cycle the
landing gear, use only an external power source capable of
delivering and maintaining 28.25 ± 0.25 volts throughout the
extension and retraction cycles when performing the landing
gear retraction inspection.
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction system for
proper operation of all components through at least two
complete cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of switches.
32
b.
Check wiring for damage and security of
connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of switches.
32
b.
Check wiring for damage and security of
connection.
32
5.
WARNING HORN - Check for proper operation.
32
6.
MAIN GEAR DOWNLOCKS - Check locking mechanism
for positive engagement in extended position.
32
7.
SAFETY SWITCH - Check for security and proper
operation.
32
8.
ACTUATORS - Check for noise, binding and proper
rigging.
32
9.
LIMIT SWITCHES
a.
Check for correct adjustment.
32
b.
Check for security of attachment.
32
Copyright © Textron Aviation Inc.
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Page 29 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
10. EMERGENCY EXTENSION - Check system for freedom
of operation and positive engagement of downlocks.
CAUTION:
Do not continue operation after receiving a geardown indication on all gears. Further movement of
the handle could damage the drive mechanism and
prevent subsequent electrical gear retraction. The
landing gear cannot be retracted manually.
Q.
32
11. NOSE GEAR RETRACT CHAIN (Exterior only) - Check
nose gear and nose gear linkage clearance from
electrical wires and obstructions.
32
12. PLACARDS - Check that all placards are in place and
are legible.
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to be
applied during start and run of the engine. Refer to the King
Air 90 Pilot's Operating Handbook and FAA Approved Airplane
Flight Manual for the engine start and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper
operation.
2.
CROSSFEED VALVE - Check for proper operation.
3.
BOOST PUMPS - Check for proper operation.
4.
STARTER-GENERATOR
5.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
6.
ENGINE OIL - Check for proper pressure and
temperature limits.
7.
FUEL QUANTITY GAGES - Check for proper operation.
8.
INTERSTAGE TURBINE TEMPERATURE / INLET
TEMPERATURE - Check for correct limits on engine
start.
9.
VACUUM SYSTEM - Check for correct limits.
10. PNEUMATIC PRESSURE GAGE - Check for correct
pressure.
11. GYRO INSTRUMENTS - Check for erratic or noisy
operation.
12. PROPELLERS
Copyright © Textron Aviation Inc.
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Page 30 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
a.
Perform low pitch torque check.
76
b.
Perform secondary low pitch stop check. (If installed)
76
13. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
14. PROPELLER SYNCHRONIZER / SYNCHROPHASER Refer to FUNCTIONAL TEST and confirm proper
synchronization.
61-23-00, 601
61
15. PROPELLER GOVERNOR - Check governor operation
(including feathering and reversing).
16. IDLE RPM - Check for correct rpm (both high and low
rpm).
17. AC INVERTERS - Check for proper operation.
18. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
19. PROPELLER DEICER - Check for proper operation and
cycling.
CMM
20. SURFACE DEICE SYSTEM - Check for proper operation
and cycling.
21. ELECTRICAL SYSTEM - Perform functional checks.
24
22. ENVIRONMENTAL SYSTEM - Check for proper
operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
23. ENGINE FIRE DETECTORS (If Installed) - Perform
system test according to instructions found in the King Air
90 Pilot's Operating Handbook and FAA Approved
Airplane Flight Manual.
24. ENGINE FIRE EXTINGUISHERS (If Installed) - Perform
system test according to instructions found in the King Air
90 Pilot's Operating Handbook and FAA Approved
Airplane Flight Manual.
25. PRESSURIZATION SYSTEM - Check for proper
operation.
NOTE:
Refer to the King Air 90 Pilot's Operating Handbook
and FAA Approved Airplane Flight Manual and
perform system test.
26. AUXILIARY FUEL TRANSFER JET PUMPS (LW-1 and
After) - Check for proper operation.
Copyright © Textron Aviation Inc.
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Page 31 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
27. CONDITION LEVER - Check for clean shutdown atIDLECUT-OFF.
28. PITOT TUBE - Check for proper heating at the unit and for
obstructions.
29. LANDING and TAXI LIGHTS - Check for proper
operation.
30. OUTBOARD WING LIGHTS (Right and Left) - Check
proper operation of all navigation and strobe (if installed)
lights.
31. COCKPIT LIGHTS - Check for proper operation.
32. EFIS COOLING BLOWERS (If installed) - Check for
proper operation.
33. ELECTRIC ELEVATOR TRIM - Check for proper
operation.
34. ENGINE and PROPELLER CONTROLS - Check for
freedom of movement, full travel and friction-lock
operation.
35. STATIC SYSTEM - Inspect alternate air valve for
operation.
34-10-03, 601
36. WINDSHIELD - Perform heated operational check.
37. THRESHOLD LIGHT - Check for proper operation.
38. CABIN and COMPARTMENT LIGHTS - Check for proper
operation.
39. AUTOPILOT - Check for proper operation as outlined in
the applicable King Air 90 Pilot's Operating Handbook
and FAA Approved Airplane Flight Manual Supplement.
40. STALL WARNING - Check for proper operation.
41. PILOT'S and COPILOT'S SEATS and SEAT BELTS Check seat adjustment mechanism and shoulder harness
inertia reel for operation.
42. CABIN SEATS and SEAT BELTS - Check seat
adjustment mechanism and shoulder harness inertia reel
for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps (If installed) do not fold too
soon and that they fold properly without interference.
b.
Check CABIN DOOR / CABIN DOOR OPEN
annunciator for proper operation.
c.
Inspect cabin door damper (If installed) for leakage
and proper operation.
44. EMERGENCY EXIT
Copyright © Textron Aviation Inc.
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Page 32 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
a.
Check emergency release handles and latch
mechanism for proper operation.
b.
Check that latches open and close freely.
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for
smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS - Check
for proper operation.
47. AILERON (LH and RH) - Check for freedom of movement.
48. AILERON TRIM TAB - Check trim tab actuator for
smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) - Check the
operation of the heated vents. They should be warm to the
touch.
50. STALL WARNING HEAT - Check for proper operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH and
RH) - Check flaps for noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper operation.
53. EXTERNAL POWER RELAY - Check for proper
operation.
R.
54. ENGINE INERTIAL ANTI-ICER - Check for proper
operation and rigging.
30
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS - Check
for smoothness of operation. Make sure movement is
between inner and outer bushings.
27
Post Inspection Items
ATA REFERENCE
1.
Deleted. Refer to item 51 under Operational Inspection.
2.
Deleted. Refer to item 52 under Operational Inspection.
3.
Deleted. Refer to item 53 under Operational Inspection.
4.
Deleted. Refer to item 54 under Operational Inspection.
5.
AIRPLANE CLEANED and SERVICED as required.
12
6.
LUBRICATE as NECESSARY.
12
7.
ENGINES INSPECTED after GROUND RUN-UP or
FLIGHT TEST - Check for oil leaks, security and
attachment of all components.
8.
AIRWORTHINESS DIRECTIVES and SERVICE
BULLETINS - Must be reviewed and complied with as
required.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
Page 33 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-22-02 (Rev D0)
9.
ADDITIONAL INSPECTION REQUIREMENTS
a. Make sure Special Inspection requirements are
complied with at the appropriate intervals.
b.
Perform Continuous Corrosion Control Inspection if
required by the environmental conditions
encountered.
05-21-05, 601
05-29-00, 601
10. IN-FLIGHT WORKSHEET - All discrepancies noted by the
pilot must be checked and corrected as required.
11. EMERGENCY LOCATOR TRANSMITTER - Check for
proper operation and make sure ELT is ARMED before
returning airplane to service.
25
12. OXYGEN SYSTEM PRESSURE - Check for proper
pressure.
12
13. EMERGENCY and SURVIVAL EQUIPMENT - (If Installed)
Make sure all necessary emergency and survival
equipment are installed in the airplane and serviceable.
14. PLACARDS - Determine that all required placards are in
place and legible.
11-20-00, 201
POH
15. LOGBOOK ENTRY - Make sure that log books are filled
out properly.
2.
Inspection Completed
I certify that the Complete Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
Copyright © Textron Aviation Inc.
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Page 34 of 34
Print Date: Thu Jan 11 11:03:59 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-00 (Rev D0)
SCHEDULED INSPECTION PROGRAM
(LJ-1063 AND AFTER)
1.
Phase Inspection Program
NOTE:
Additional inspections may be required by engine or propeller manufactures in their manuals. Refer to the
unscheduled maintenance checks portion of the supplier issued manuals to ensure continued
airworthiness.
A.
B.
C.
D.
The owner/operator is ultimately responsible for maintaining the airplane in an airworthy condition, including compliance with all
applicable Airworthiness Directives as specified in Part 39 of the Federal Aviation Regulations (FAR) under the Title 14 of the
Code of Federal Regulations. The owner/operator should select only qualified personnel to maintain the airplane, and ensure
that the airframe and power plant mechanic inspecting the airplane has access to all necessary manuals and service
information as well as to an approved inspection guide.
Airframe and power plant mechanics must have had previous experience in the satisfactory performance of the tasks required
by this inspection before being qualified to supervise, approve and return to service the airplane or any part thereof in need of
maintenance, preventative maintenance, repair or alteration.
It is further the responsibility of the owner/operator to ensure that the airplane is inspected in conformity with the requirements
covered in 14 CFR Part 91.409 (f) (3) of the Federal Aviation Regulations. This FAR Part covers the requirements concerning
approved airplane inspection programs. Textron Aviation Inc. has prepared the Inspection Program to assist the owner or
operator in meeting the foregoing responsibilities.
It is the responsibility of the owner or operator to obtain specific approval from their local airworthiness authority for any
alteration to the inspection Program.
NOTE:
E.
F.
G.
When warranted by service experience or engineering recommendations, an approved maintenance
program, including the inspection intervals, may be changed at any time with the approval of the local
airworthiness authority.
This document is a portion of the publications by which Textron Aviation Inc. provides the inspection requirements and
maintenance schedules for the continued airworthiness of the airframe of your airplane. Remember, maintenance requirements
for some supplier components (such as engines, propellers, avionics and other equipment) are separately provided by their
respective manuals. Those maintenance requirements and schedules are adopted by reference in the airframe maintenance
instructions for continued airworthiness. Have your maintenance personnel review the equipment installed on your airplane to
ensure the current, up-to-date supplier maintenance publications and manuals are available and that all required maintenance is
scheduled and performed as required under 14 CFR 91.403 (c).
This Inspection Program is provided to enable the owner/operator to inspect and maintain the airplane on an ongoing basis.
Included in the program is a sequence for conducting the program along with suggested times. The times and sequence are
recommendations that may be altered to suit a particular operation. While this program may be used as an outline, detailed
information of the systems and components in the airplane will be found in the various chapters/sections of the maintenance
manual and the pertinent supplier publications. It is also recommended that reference be made to the applicable maintenance
handbooks, service instructions, applicable FAA Regulations, Publications and supplier's specification for torque values,
clearance, settings, tolerances and other requirements.
This program is not intended to be all-inclusive, for no such program can replace the good judgement of a certified airframe and
power plant mechanic in the performance of his duties.
NOTE:
2.
In addition to the inspections prescribed by this schedule, the altimeter instrument (LJ-1063 thru LJ1846, LJ-1848 thru LJ-1852) and static system and all ATC transponders MUST be tested and inspected
in compliance with the requirements specified in 14 CFR 91.411 and 91.413 at 24-month intervals or
anytime the system is opened.
NOTE:
Information contained herein is applicable to Beech King Air 90 airplanes except where differences are
indicated by serial number effectivity.
Special Conditions Cautionary Notice
CAUTION: The time periods in this schedule do not constitute a guarantee the item will reach the period without
malfunction as the aforementioned factors cannot be controlled by the manufacturer.
WARNING: Use only genuine Textron Aviation Inc., or Textron Aviation Inc.-approved parts obtained from Textron
Aviation Inc. approved sources in connection with the maintenance and repair of Textron Aviation Inc.
airplanes to assure that the airplane is returned to service in a condition at least equal to its original or
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 1 of 4
Print Date: Thu Jan 11 11:04:01 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-00 (Rev D0)
properly altered condition. Genuine Textron Aviation Inc. parts are produced and inspected under rigorous
procedures to ensure airworthiness and suitability for use in Textron Aviation Inc. airplane applications
Parts purchased from sources other than Textron Aviation Inc., even though outwardly identical in
appearance, may not have had the required tests and inspections performed, may be different in fabrication
techniques and materials, and may be dangerous when installed in an airplane.
WARNING: Salvaged airplane parts, reworded parts obtained from non- Textron Aviation Inc. sources, or parts,
components, or structural assemblies, the service history of which is unknown or cannot be authenticated,
may have been subjected to unacceptable stresses or temperatures or have other hidden damage not
discernible through routine visual or usual nondestructive testing techniques. This may render the part,
component, or structural assembly, even though originally manufactured by Textron Aviation Inc.,
unsuitable and unsafe for airplane use
WARNING: Textron Aviation Inc. expressly disclaims any responsibility for malfunctions, failures, damage or injury
caused by use of non- Textron Aviation Inc.-approved parts or procedures.
A.
3.
The time periods for the inspections noted in this schedule are based on normal usage under average environmental
conditions. Airplanes operated for Air Taxi or other than normal operations and airplanes operated in humid tropics, or in cold
damp climates, etc., may need more frequent inspections for wear, corrosion, lubrication, and/or lack of maintenance. Under
these adverse conditions, perform periodic inspections in compliance with this guide at more frequent intervals until the owner
or operator can set his own inspection periods based on the contingencies of field experience.
Scheduled Inspection General Information
A.
Inspection Interval Tolerance
To facilitate scheduling inspection, Textron Aviation Inc. authorizes the following inspection interval tolerances:
(1) Phase Inspections (Hour Interval)
(a) A tolerance of ±20 hours is allowed. Each phase inspection must be completed within 20 hours of the prescribed
time.
(b) EXAMPLE: A PHASE 1 INSPECTION, due at 200 hours, may be accomplished anytime between 180 and 220
hours. A PHASE 2 INSPECTION, due at 400 hours, may be accomplished anytime between 380 and 420 hours, etc.
(2) Special Inspection Items - Calendar Date Limited
(a) A tolerance of ±12 days per 12 calendar months is allowed, not to exceed a total of 60 calendar days.
(3) Special Inspection Items - Flight Cycle Limited
(a) A tolerance of ±10% is allowed.
(4) Special Inspection Items - Hourly Limited
(a) A tolerance of ±10% is allowed.
NOTE:
B.
Tolerances specified by supplier's, DOT regulations or FAA regulations take precedence over
inspection intervals and tolerances authorized by Textron Aviation Inc..
Purpose and Use
(1) The Textron Aviation Inc.-recommended Beech King Air 90 Inspection Program is provided to maintain the Beech King Air
90 airplanes that are utilized by owners and operators on a continuous basis. The complete program must be
accomplished at least one time every 24 calendar months.
NOTE:
Owners and operators wishing to utilize inspection intervals of less than 200 hours may do so
without obtaining Textron Aviation Inc. concurrence. Refer to the latest revision of this form for
inspection procedure details to meet 14 CFR 91.409 (f) (3).
(2) Inspection timetables are a follows:
•
Inspection Phase 1: To be performed at 200 hours and every 800 hours thereafter.
•
Inspection Phase 2: To be performed at 400 hours and every 800 hours thereafter.
•
Inspection Phase 3: To be performed at 600 hours and every 800 hours thereafter.
•
Inspection Phase 4: To be performed at 800 hours and every 800 hours thereafter.
(3) Alternate Phase Inspection : If an aircraft is not flown at least 400 hours in 24 months, the owner/operator may perform
scheduled phase inspections 1 and 2 together within 12 months after the last aircraft inspection; then the owner/operator
may perform scheduled phase inspections 3 and 4 together within 12 months after completing the phase 1 and 2
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 2 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-00 (Rev D0)
inspections.
NOTE:
Textron Aviation Inc. recommends that no aircraft exceed 12 months without completing at least
one phase inspection.
(4) Special Inspections : Although this inspection program is based on 200-hour intervals, there are items which require
more, or less, frequent inspection or whose inspection interval is based on flight time, calendar elapsed time, or cycles.
These unique inspection items and their time intervals are described under SPECIAL INSPECTIONS and should be
reviewed prior to commencing any scheduled inspection.
(5) A complete scheduled inspection (all Phase 1, 2, 3 and 4 Inspections) must be accomplished within a 24-calendar-month
period. Any part of the inspection which has not been accomplished will become due immediately. Completion of the
Phase 1, 2, 3 and 4 Inspections shall be considered as a complete inspection.
NOTE:
Textron Aviation Inc.'s Recommended Inspection Program in accordance with 14 CFR 91.409 (f) (3)
consists of, but is not limited to, inspection items listed in this Inspection Guide, any applicable
Airworthiness Directives issued against the airframe or any equipment installed therein, conformity
to Type Certificate Data Sheet and Maintenance Manual Chapter 04 as applicable.
WARNING: Ascertain that all placards are in place and legible whenever the airplane has been repainted or
touched up after repairs. Replace any placards that have been inadvertently defaced or removed.
(6) While this guide may be used as an outline, detailed information of the many systems and components in the airplane will
be found in the various sections/chapters of this Maintenance Manual and the Engine Maintenance Manual. Reference to
the Engine Maintenance Manual is to the Pratt & Whitney Canada PT6A-21 Maintenance Manual. It is also recommended
that reference be made to the applicable supplier maintenance handbooks, Textron Aviation Inc. service bulletins,
applicable FAA Regulations and supplier bulletins and specifications for torque values, clearances, settings, tolerances
and other requirement. It is the responsibility of the owner or operator to ensure that the airframe and power plant
mechanic inspecting the airplane has access to the previously noted documents as well as to this inspection guide.
(7) Textron Aviation Inc. issues service information for the benefit of owners and fixed-base operators in the form of two
classes of service bulletins. The first class, MANDATORY Service Bulletins (red border) are changes, inspections and
modifications that could affect safety or crashworthiness. Textron Aviation Inc. considers compliance with these service
bulletins to be mandatory. Textron Aviation Inc. also issues a service bulletin having no border designated as either
RECOMMENDED or OPTIONAL in the compliance section within the bulletin. In the case of a RECOMMENDED Service
Bulletin, Textron Aviation Inc. feels the changes, modifications, improvements or inspections will benefit the owner/operator
and although highly recommended, they are not considered mandatory at the time of issuance. In the case of OPTIONAL
Service Bulletins, the changes, modifications, improvements or inspections compliance s at the owner/operator's
discretion.
(8) In the final analysis it is the responsibility of the owner or operator to ensure that all Textron Aviation Inc. service bulletins
which are pertinent to his particular operation are complied with.
Table 1. Inspection Schedule Outline
A/C TIME
(HOURS)
200
400
1
INSPECTION PHASE
2
3
X
X
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
4
TYPE OF INSPECTION
Nose Landing Gear Area, Nose Gear, Pilot's
Compartment, Cabin Section, Rear Fuselage and
Empennage, Wings, Main Gear Area, Engines, Landing
Gear Retraction, Operational Inspection, Post
Inspection.
Nose Section, Nose Avionics Compartment, Nose
Landing Gear Area, Nose Gear, Pilot's Compartment,
Cabin Section, Rear Fuselage and Empennage, Wings,
Main Landing Gear Area, Engines, Landing Gear
Retraction, Operational Inspection, Post Inspections.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-00 (Rev D0)
600
Nose Landing Gear Area, Nose Gear, Pilot's
Compartment, Cabin Section, Rear Fuselage and
Empennage, Wings, Main Landing Gear Area, Engines,
Landing Gear Retraction, Operational Inspection, Post
Inspections.
X
800
X
Nose Section, Nose Avionics Compartment, Nose
Landing Gear Area, Nose Gear, Pilot's Compartment,
Cabin Section, Rear Fuselage and Empennage, Wings,
Main Landing Gear Area, Engines, Landing Gear
Retraction, Operational Inspection, Post Inspection.
AFTER THE "PHASE 4" INSPECTION IS COMPLETED, REPEAT THE INSPECTION SEQUENCE.
C.
D.
Definitions
(1) The terminology pertaining to the inspection procedures and their use is defined as follows:
(a) Flight Time - Flight time shall mean the total time from the moment the airplane first moves under its own power for the
purpose of flight until the moment it comes to rest at the next point of landing. ("Block-to-block" time).
(b) Maintenance - Means inspection, overhaul, repair, preservations and the replacement of parts, but excludes
preventive maintenance.
(c) Pilot in Command - Pilot in command shall mean the pilot responsible for the operation and safety of the airplane
during the time defined as flight time.
(d) Preventive Maintenance - Means simple or minor preservative operations and the replacement of small standard
parts not involving complex assembly operations.
(e) Time in Service - Time in Service, as used in computing maintenance and inspection time records, is the time from
the moment the airplane leaves the ground until it touches the ground at the end of the flight.
(f) Flight Cycle - A flight cycle is defined as: Engine start-up and increase to full or partial power (as required during a
normal flight), one landing gear retraction and extension and a complete shutdown.
(g) Corrosion - Pitting, or a surface breakdown of a material due to chemical or electro-chemical attack by atmosphere,
moisture or other agents.
(h) Wear - Material or part consumed as a result of exposure to operation or usage.
(i) Damaged - Rendered unusable for its intended purpose.
(j) Calendar Time - The time from the date on the "ORIGINAL AIRWORTHINESS CERTIFICATE", FAA Form No. 81002, which is issued with each new airplane, to be used as the basis for all TBO or of replacement components.
(k) Special Inspection - Inspections of components or systems based on calendar time, hours or cycles which do not
coincide with the scheduled inspection.
(l) Unscheduled Maintenance Checks - Inspections and checks for damage after operating the airplane in conditions
which could require unscheduled maintenance, i.e. lightning strikes, hard landing, polluted atmospheric conditions,
etc.
Discrepancies
(1) Discrepancies that affect the airworthiness of the airplane will require the necessary corrective action to be accomplished
before the airplane is returned to service.
(2) Discrepancies that do not affect the airworthiness of the airplane may, at the discretion of the owner/operator, be carried
over to the next inspection period. All discrepancies thus carried over should be retained in the ship file until corrected.
(3) Discrepancies which occur during flight should be entered on the "In-Flight Work Sheet" by the pilot in command or another
responsible person.
(4) Forms for the "In-Flight Work Sheet", "Scheduled Inspection Work Sheet", and "Overhaul and Replacement Work Sheet"
are provided at the end of subchapter 05-00-00, 001. These forms may be copied for use during each phase of the
inspection.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 4 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 1) - INSPECTION/CHECK
(LJ-1063 AND AFTER)
Scheduled Inspection Program (Phase 1)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Nose Section
NOTE:
B.
NOTE:
C.
There are no inspections required in this section during this phase.
Nose Avionics Compartment
There are no inspections required in this section during this phase.
Nose Landing Gear Area
ATA REFERENCE
1.
D.
ELECTRICAL WIRING and EQUIPMENT Inspect all exposed electrical wiring and
equipment for chafing, damage and security of
attachment.
MECH
INSP
MECH
INSP
AC43.13-1B/2B
Nose Gear
ATA REFERENCE
1.
2.
WHEEL
a.
Inspect wheel for wear, damage and
corrosion.
32
CMM
b.
Inspect wheel bearings and races for
wear, pitting, cracks, discoloration, rust or
other indications of damage.
32
CMM
TIRE
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
12
CMM
12-20-15, 301
CMM
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
E.
3.
SHIMMY DAMPER - Inspect for leaks, security
and attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect
for cracks, damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect
steering stop for damage or distortion.
6.
LANDING and TAXI LIGHTS - Inspect for
broken lenses or bulbs.
33
7.
STEERING LINKAGE - Inspect nose gear
steering mechanism and attaching hardware
for wear, damage and corrosion.
32
8.
NOSE LANDING GEAR STRUT - Check strut
for leakage and correct extension.
32
9.
ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, proper routing of
wire bundles and security of attachment.
AC43.13-1B/2B
32
Flight Compartment
ATA REFERENCE
1.
2.
MECH
INSP
WINDSHIELD
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal
(Silicone) for debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal
(Polysulfide) for debonding, cracks or
wear.
56
WINDOWS
a.
b.
c.
Inspect exterior surface of cockpit side
windows for scratches, cracks, chips,
excess crazing or any indication of
delamination.
56
Inspect for any contact of the milled edge
of the window with the airframe skin.
Correct window contact by reinstalling
and recentering the window in the
airframe opening.
56
Inspect for any damage from paint
strippers, solvents or any unapproved
sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all
moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for
damage and wear.
25
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 2 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
5.
PORTABLE FIRE EXTINGUISHER - Inspect
the bottle for signs of damage and mount for
security of attachment.
26
CMM
6.
SEAT BELTS and SHOULDER
HARNESSES - Inspect seat belts and
shoulder harnesses for deterioration or
missing components.
25
7.
8.
BRAKE FLUID RESERVOIR PRESSURE
EQUALIZATION ORIFICE - Clean and flush
orifice of contaminants.
32-40-03, 701
UPHOLSTERY PANELS - Inspect for security
of attachment.
25
9.
FLIGHT CONTROL CABLE TENSION Inspect and record aileron cable tension:
TEMPERATURE:________ °F
CONTROL COLUMN INTERCONNECT CABLE
TENSION:_______
1/8 in. AILERON CABLE TENSION:
LEFT ________ RIGHT_____
27
10. HEATING SYSTEM
CAUTION:
Prior to installing flight compartment floor
panels, visually inspect the entire length
of the elevator control cable in this area to
assure adequate clearance between the
cable and electrical wiring, bleed air ducts,
bleed air duct clamps, and structural
components to prevent chaffing and wear.
F.
a.
Check all ducts for damage and
deterioration.
21
b.
Check bleed air ducts for damage,
insulation and adequate clearance of
electrical wiring and control cables.
21
Cabin Section
ATA REFERENCE
1.
WINDOWS - Inspect exterior surface of windows
for deep scratches, cracks, chips and excessive
crazing or other damage.
56
2.
ROTATING or FLASHING BEACON - Inspect
for cracked or broken lenses.
33
3.
ACCESS DOORS - Inspect for fit and
attachment.
4.
OUTFLOW and SAFETY VALVES - Drain
outflow valve control line.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
06-50-00, 001
21
Page 3 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
5.
SEAT TRACKS - Inspect seat tracks for
damage and wear.
6.
SEAT BELTS and SHOULDER HARNESSES
7.
25
a.
Inspect seats and shoulder harnesses for
deterioration or missing components.
25
b.
Inspect shoulder harness attachment posts
for cracked, worn, brittle or missing
grommet (If Installed).
25
OXYGEN SYSTEM
a.
Test all outlets and masks for oxygen flow.
35
b.
Inspect oxygen system installation for
damage and security of attachment.
35
8.
TOILET (If Installed) - Inspect for spillage and
leakage below the toilet.
38
9.
CABIN ENTRANCE DOOR
a.
Inspect the door seal for cuts, abrasions
and security of attachment.
52
b.
Inspect the cabin door support cables for
wear, damage and security.
52
10. PORTABLE FIRE EXTINGUISHER - Inspect
bottle for damage and security of attachment.
26
CMM
11. LANDING GEAR POWER PACK and MOTOR
a.
Perform the GEAR-UP AND GEARDOWN PORT FINGER SCREEN
CLEANING procedure.
12
Perform the LANDING GEAR BLEED AIR
OVERBOARD RELIEF ORIFICE
procedure.
12
c.
Inspect all plumbing attach points for leaks
and security of attachment.
32
d.
(LJ-1847, LJ-1853 and After) Autopilot
Servo and Cable - Inspect the aileron servo
and mount for security. Inspect mount
capstan for cable wear, contamination and
excessive cable spool-off angle. Inspect
cables for wear and damage. Verify cable
tensions are within limits specified in the
basic maintenance manual.
22
b.
G.
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and
inspect.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
53-10-00, 601
Page 4 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
2.
a.
Inspect for leakage, corrosion or loose
connections.
25
b.
Determine remaining useful life.
25
NAVIGATION LIGHTS and ROTATING
(Flashing) BEACONS - Inspect for broken or
cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security
of attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the
drain holes in the bottom of the ventral fin for
obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration,
damage and attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect
the drain holes for obstructions.
27
8.
STATIC WICKS
3.
9.
H.
ELT BATTERY
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
RUDDER BOOST SYSTEM - Replace Filter.
27
10. FLIGHT CONTROL CABLE TENSION - Inspect
and record elevator, elevator tab, rudder and
rudder tab cable tension:
TEMPERATURE:________ °F
ELEVATOR CABLE TENSION: UP
______DOWN_____
ELEVATOR TAB CABLE TENSION:__________
RUDDER CABLE TENSION: LEFT ______RIGHT____
RUDDER TAB CABLE TENSION:
27
11. (LJ-1847, LJ-1853 and After) Autopilot Servos
and Cables - Inspect the rudder, elevator and
elevator trim servos and mounts for security.
Inspect mount capstans for cable wear,
contamination and excessive cable spool-off
angle. Inspect cables for wear and damage.
Verify cable tensions are within limits specified
in the basic maintenance manual.
22
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
28
Page 5 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
2.
3.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the
wing center section and outboard wing upper
attachment fittings.
LIGHTS
a.
b.
4.
SIRM
Inspect the navigation and recognition (if
installed) lights for broken or cracked
lenses.
33
Inspect the strobe light for broken or
cracked lenses, if installed.
33
FUEL TANKS and VENTS
a.
Inspect the exterior of the wing for leaks.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing or flexibility, splits, cracks, or
distortion.
28
Inspect exterior openings of vents for
obstructions.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect
for fit and attachment.
06-50-00, 001
7.
STATIC WICKS
c.
8.
9.
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the
CHECKING AILERON TAB FREE PLAY
procedure.
27-10-15, 601
LEFT-HAND OUTBOARD WING - Inspect skin,
structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
SIRM
10. LEFT-HAND OUTBOARD FLAP - Inspect skin,
structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
27
11. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, proper routing of
wire bundles and security of attachment.
AC43.13-1B/2B
12. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
Copyright © Textron Aviation Inc.
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Page 6 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
a.
b.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables that
have more than three broken wires in any
given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
13. FLIGHT CONTROL CABLE TENSION - Inspect
and record aileron cable tension:
TEMPERATURE: __°F
CONTROL COLUMN INTERCONNECT CABLE
TENSION: __
3/16 in. AILERON CABLE TENSION: LEFT :__
AILERON TAB CABLE TENSION: __
27
14. FLAP and ACTUATORS
I.
a.
Inspect flap 90° drive, cable and actuator
for attachment.
b.
Inspect flap tracks for wear.
27
27-50-01, 601
15. FUEL PLUMBING - Inspect for leaks, chafing or
damage and attachment.
28
16. HINGED ACCESS DOORS (Inside wing
access panels 13 and 14) - Inspect for cracks or
damage to hinge and fasteners.
06-50-00, 001
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
3.
MECH
INSP
28
a.
Inspect the exterior of the center section
for leaks.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing for flexibility, splits, cracks, or
distortion.
28
CENTER SECTION -Deleted.
a.
Deleted.
Copyright © Textron Aviation Inc.
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Page 7 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
4.
NACELLE FUEL CELL and PROBE - Inspect
for microbiological sludge buildup. If sludge is
found, inspect all fuel probes, tanks, fuel lines
and replace the fuel filter. Clean as required. If
needed, use BIOBOR JF or Kathon FP 1.5
additive.
28-00-00, 001
12-10-01, 301
5.
ACCESS DOORS (Inspection Panels) Inspect for fit and attachment.
06-50-00, 001
6.
FUEL PUMPS - Inspect the pumps for leaks
and security of attachment.
7.
HYDRAULIC LANDING GEAR
ACCUMULATOR, FLUID RESERVOIR and
ALL PLUMBING
8.
9.
28
a.
Inspect for damage, security of
attachment and leaks.
12
32
b.
Clean and inspect hydraulic power pack
fill reservoir screen.
12
32
c.
Check for proper fluid level in the fluid
reservoir.
12
LEFT-HAND WING CENTER SECTION AREA
- Inspect wing center section and inboard flap,
skin structure and attaching hardware for wear,
damage and corrosion. If damage is found in a
given area check the adjacent area.
SIRM
FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator
for attachment.
27
b.
Inspect flap tracks for wear.
27
10. LEADING EDGE and NACELLE FUEL
PLUMBING - Inspect fuel plumbing for leaks,
damage and security of attachment.
28
11. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
a.
b.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacement.
27
20
Inspect control cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables
that have more than three broken wires in
any given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 8 of 22
Print Date: Thu Jan 11 11:04:02 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
J.
12. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, and proper
routing of wire bundles and security of
attachment.
AC43.13-1B/2B
13. BLEED AIR BYPASS VALVE - Check bleed
air valve at heat exchanger for operation of
linkage to butterfly valve and operation of
actuator motor.
21
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT Inspect exposed wiring and equipment for
chafing, damage and proper routing and
security of attachment.
AC43.13-1B/2B
8.
K.
a.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion
and security of all components.
7.
INSP
WHEELS
2.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
DRAG BRACE
a.
Inspect for security of attach fittings.
32
b.
Inspect downlock bolts for proper torque
(finger-tight and safety-wired).
CMM
MAIN LANDING GEAR AREA - Inspect wheel
well and gear door structure, all components
and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found,
check the adjacent area.
32
Left-Hand Engine
Copyright © Textron Aviation Inc.
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Page 9 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller
deice system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the
firewall filter for evidence of foreign matter,
corrosion or microbiological growth in the fuel
system. If any microbiological growth is found,
use BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment(spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal
particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
6.
7.
a.
Check vane(s) for freedom of movement
and correct travel. Lubrication of linkage
and vane hinges may be necessary.
12
30
b.
Check main and standby actuator motors
and limit switches for operation and
correct adjustment.
12
30
INSP
MECH
INSP
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of
attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
a.
b.
L.
MECH
Remove and visually inspect plug for metal
particles and damage. Perform the
MAGNETIC CHIP DETECTOR
INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. Perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
Right-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the
wing center section and outboard wing upper
attachment fittings.
SIRM
3.
LIGHTS
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
a.
4.
Inspect the navigation and recognition (if
installed) lights for broken or cracked
lenses.
33
b.
Inspect the strobe light for broken or
cracked lenses, if installed.
33
c.
Inspect the landing lights for broken or
cracked lenses on LJ-1 thru LJ-501.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect
for fit and attachment.
06-50-00, 001
7.
STATIC WICKS
c.
8.
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the
CHECKING AILERON TAB FREE PLAY
procedure.
27
RIGHT-HAND OUTBOARD WING - Inspect
skin, structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
SIRM
10. RIGHT-HAND OUTBOARD FLAP - Inspect
skin, structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion
is found in a given area, check the adjacent
area.
27
11. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, proper routing of
wire bundles and security of attachment.
AC43.13-1B/2B
9.
12. FLIGHT CONTROL COMPONENTS, CABLES
and PULLEYS
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
a.
b.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables that
have more than three broken wires in any
given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
13. FLIGHT CONTROL CABLE TENSION CHECK
- Inspect and record aileron and aileron tab
cable tension:
TEMPERATURE:__ °F
3/16" AILERON CABLE TENSION: RIGHT :
AILERON TAB CABLE TENSION:
27
14. FLAP and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator
for attachment.
b.
Inspect flap tracks for wear.
27
27-50-01, 601
15. FUEL PLUMBING - Inspect for leaks, chafing or
damage and attachment.
28
16. HINGED ACCESS DOORS (Inside wing
access panels 13 and 14) - Inspect for cracks
or damage to hinge and fasteners.
06-50-00, 001
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
3.
MECH
INSP
28
a.
Inspect the exterior of the center section
for leaks.
28
b.
Inspect fuel cap for damage and
attachment. Inspect the visible fuel cap
packing for flexibility, splits, cracks, or
distortion.
28
CENTER SECTION - Deleted.
a.
Deleted.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
4.
NACELLE FUEL CELL and PROBE - Inspect
for microbiological sludge buildup. If sludge is
found, inspect all fuel probes, tanks, fuel lines
and replace the fuel filter. Clean as required. If
needed, use BIOBOR JF or Kathon FP 1.5
additive.
5.
ACCESS DOORS (Inspection Panels) Inspect for fit and attachment.
6.
BATTERY
28
12
06-50-00, 001
a.
Service as required.
12
b.
Remove battery and inspect the battery
box, cables and vent tubes for
deterioration or obstructions (LJ-1063
thru LJ-1533).
24
Remove battery and inspect the battery
box and cables for deterioration (LJ-1534
and After).
28
c.
7.
FUEL PUMPS - Inspect the pumps for leaks
and security of attachment.
28
8.
RIGHT-HAND WING CENTER SECTION
AREA - Inspect wing center section and
inboard flap, skin structure and attaching
hardware for wear, damage and corrosion. If
damage is found in a given area check the
adjacent area.
SIRM
9.
FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator
for attachment.
27
b.
Inspect flap tracks for wear.
27
10. LEADING EDGE and NACELLE FUEL
PLUMBING - Inspect fuel plumbing for leaks,
damage and security of attachment.
11. FLIGHT CONTROL COMPONENTS,
CABLES and PULLEYS
a.
b.
Inspect control system components
(pushrods, turnbuckles, end fittings,
castings, pulley brackets, etc.) for bulges,
splits, bends or cracks which are
conditions for replacement.
27
20
Inspect control cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance
and proper operation. Replace cables
that have more than three broken wires in
any given three-foot cable length or have
evidence of corrosion.
27
20-04-00, 201
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
12. ELECTRICAL WIRING and EQUIPMENT Inspect for chafing, damage, and proper
routing of wire bundles and security of
attachment.
N.
13. BLEED AIR BYPASS VALVE - Check bleed
air valve at heat exchanger for operation of
linkage to butterfly valve and operation of
actuator motor.
Right-Hand Main Landing Gear Area
AC43.13-1B
21
ATA REFERENCE
1.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT Inspect exposed wiring and equipment for
chafing, damage and proper routing and
security of attachment.
AC43.13-1B/2B
8.
O.
a.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion
and security of all components.
7.
INSP
WHEELS
2.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
DRAG BRACE
a.
Inspect for security of attach fittings.
32
b.
Inspect downlock bolts for proper torque
(finger-tight and safety-wired).
CMM
MAIN LANDING GEAR AREA - Inspect wheel
well and gear door structure, all components
and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found,
check the adjacent area.
32
Right-Hand Engine
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller
deice system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the
firewall filter for evidence of foreign matter,
corrosion or microbiological growth in the fuel
system. If any microbiological growth is found,
use BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment(spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal
particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
6.
7.
a.
Check vane(s) for freedom of movement
and correct travel. Lubrication of linkage
and vane hinges may be necessary.
12
30
b.
Check main and standby actuator motors
and limit switches for operation and
correct adjustment.
12
30
INSP
MECH
INSP
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of
attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
a.
b.
P.
MECH
Remove and visually inspect plug for
metal particles and damage. Perform the
MAGNETIC CHIP DETECTOR
INSPECTION procedure.
12
79-30-05, 401
Check light in annunciator panel for
proper operation. Perform the
MAGNETIC CHIP DETECTOR
ANNUNCIATOR TEST procedure.
12-10-03, 301
Landing Gear Retraction
ATA REFERENCE
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
NOTE:
Since battery voltage is not sufficient to properly
cycle the landing gear, use only an external power
source capable of delivering and maintaining 28.25
± 0.25 volts throughout the extension and
retraction cycles when performing the landing gear
retraction inspection.
NOTE:
The hydraulic landing gear system pump may
cavitate and not operate properly during ground
use of the hydraulic power pack for retraction
and/or extension of the landing gear. To prevent
this, an exterior supply of dry air at 18 to 20 psi
must be applied to the power pack reservoir to
prevent cavitation. If an external air supply is not
available, use an external hydraulic pressure
source. (Ref. OPERATING THE LANDING GEAR
USING THE POWER PACK, Chapter 32).
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction
system for proper operation of all
components through at least two complete
cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and
fit.
32
b.
Check door linkage for wear, damage
and rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation
of switches.
32
b.
Check wiring for damage and security of
connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation
of switches.
32
b.
Check wiring for damage and security of
connection.
32
5.
WARNING HORN - Check for proper
operation.
32
6.
MAIN GEAR DOWNLOCKS - Check locking
mechanism for positive engagement in
extended position.
32
SAFETY SWITCH - Check for security and
proper operation.
32
7.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
8.
ACTUATORS - Check for noise, binding and
proper rigging.
32
9.
EMERGENCY EXTENSION - Check system
for freedom of operation and positive
engagement of downlocks.
32
10. PLACARDS - Check that all placards are in
place and are legible.
Q.
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures
are to be applied during start and run of the engine.
Refer to the King Air 90 Pilot's Operating Handbook
and FAA Approved Airplane Flight Manual for the
engine start and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for
proper operation.
2.
CROSSFEED VALVE - Check for proper
operation.
3.
BOOST PUMPS - Check for proper operation.
4.
STARTER-GENERATOR
5.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light
illumination.
6.
ENGINE OIL - Check for proper pressure and
temperature limits.
7.
FUEL QUANTITY GAGES - Check for proper
operation.
8.
INTERSTAGE TURBINE TEMPERATURE Check for correct limits on engine start.
9.
VACUUM SYSTEM - Check for correct limits.
10. PNEUMATIC PRESSURE GAGE - Check for
correct pressure.
11. GYRO INSTRUMENTS (LJ-1063 thru LJ-1846,
LJ-1848 thru LJ-1852) - Check for erratic or
noisy operation.
12. PROPELLERS - Perform low pitch torque
check.
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76
Page 17 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
13. AUTOFEATHERING CHECK (If Installed) Refer to AUTOFEATHER OPERATIONAL
CHECK.
61-23-00, 601
14. PROPELLER SYNCHROPHASER - Refer to
FUNCTIONAL TEST and confirm proper
synchronization.
61
15. PROPELLER GOVERNOR - Check governor
operation (including feathering and reversing).
16. IDLE RPM - Check for correct rpm (both high
and low rpm).
17. AC INVERTERS (LJ-1063 thru LJ-1846, LJ1848 thru LJ-1852) - Check for proper
operation.
18. RUDDER BOOST - Check for proper
operation.
27
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper
operation and cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for
proper operation and cycling.
22. ELECTRICAL SYSTEM
a.
Perform functional checks (LJ-1063 thru
LJ-1846, LJ-1848 thru LJ-1852).
24-51-00, 601
b.
Perform functional checks (LJ-1847, LJ
1853 and After).
24-60-00, 601
23. ENVIRONMENTAL SYSTEM - Check for
proper operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation as
outlined in the applicable King Air 90 Pilot's
Operating Handbook and FAA Approved
Airplane Flight Manual Supplement.
25. STALL WARNING - Check for proper
operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
26. ENGINE FIRE DETECTORS (If Installed) Perform system test according to instructions
found in the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) Perform system test according to instructions
found in the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual.
28. PRESSURIZATION SYSTEM - Check for
proper operation.
NOTE:
Refer to the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane
Flight Manual and perform system test.
29. CONDITION LEVER - Check for clean
shutdown atIDLE-CUT-OFF.
30. PITOT TUBE - Check for proper heating at the
unit and for obstructions.
31. LANDING and TAXI LIGHTS - Check for
proper operation.
32. OUTBOARD WING LIGHTS (Right and Left) Check proper operation of all navigation and
strobe (if installed) lights.
33. COCKPIT LIGHTS - Check for proper
operation.
34. EFIS COOLING BLOWERS (If installed) Check for proper operation.
35. ELECTRIC ELEVATOR TRIM - Check for
proper operation.
36. ENGINE and PROPELLER CONTROLS Check for freedom of movement, full travel and
friction-lock operation.
37. STATIC SYSTEM - Inspect alternate air valve
for operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational
check.
39. THRESHOLD LIGHT - Check for proper
operation.
40. CABIN and COMPARTMENT LIGHTS - Check
for proper operation.
41. PILOT'S and COPILOT'S SEATS and SEAT
BELTS - Check seat adjustment mechanism
and shoulder harness inertia reel for operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
42. CABIN SEATS and SEAT BELTS - Check
seat adjustment mechanism and shoulder
harness inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps do not fold too
soon and that they fold properly without
interference.
b.
Check CABIN DOOR unlock annunciator
for proper operation.
c.
Inspect cabin door damper for leakage
and proper operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and
latch mechanism for proper operation.
52
b.
Check that latches open and close freely.
52
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors
for smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE
LIGHTS - Check for proper operation.
47. AILERON (LH and RH) - Check for freedom of
movement.
48. AILERON TRIM TAB - Check trim tab actuator
for smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) Check the operation of the heated vents. They
should be warm to the touch.
50. STALL WARNING HEAT - Check for proper
operation.
51. FLAPS and ACTUATORS (Inboard, Outboard,
LH and RH) - Check flaps for noisy or erratic
operation.
52. WING ICING LIGHTS - Check for proper
operation.
53. EXTERNAL POWER RELAY - Check for
proper operation.
54. AVIONICS COOLING BLOWER - Check for
proper operation.
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34
Page 20 of 22
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
R.
55. ELEVATOR TRIM TAB ACTUATOR
BUSHINGS - Check for smoothness of
operation. Make sure movement is between
inner and outer bushings.
27
56. AUTOPILOT - DCU AURAL WARNING (LJ1847, LJ-1853 and After) - Perform the
Autopilot Data Concentrator Unit (DCU) Aural
Warning Inspection procedure.
22
57. STALL WARNING - AUTOPILOT
DISCONNECT (LJ-1847, LJ-1853 and After) Perform the Stall Warning Autopilot
Disconnect Inspection procedure.
22
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as
required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUNUP or FLIGHT TEST - Check for oil leaks,
security and attachment of all components.
4.
AIRWORTHINESS DIRECTIVES and
SERVICE BULLETINS - Must be reviewed
and complied with as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
b.
Make sure Special Inspection
requirements are complied with at the
appropriate intervals.
05-25-05, 601
Perform Continuous Corrosion Control
Inspection if required by the
environmental conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies
noted by the pilot must be checked and
corrected as required.
7.
EMERGENCY LOCATOR TRANSMITTER Check for proper operation and make sure
ELT is ARMED before returning airplane to
service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for
proper pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT (If Installed) Make sure all necessary
emergency and survival equipment are
installed in the airplane and serviceable.
Copyright © Textron Aviation Inc.
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MECH
INSP
Page 21 of 22
Print Date: Thu Jan 11 11:04:02 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-01 (Rev D0)
10. PLACARDS - Determine that all required
placards are in place and legible.
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books
are filled out properly.
2.
Inspection Completed
I certify that the Phase 1 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 2) - INSPECTION/CHECK
(LJ-1063 AND AFTER)
Scheduled Inspection Program (Phase 2)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Nose Section
ATA REFERENCE
1.
B.
INSP
MECH
INSP
MECH
INSP
AIR-CONDITIONING COMPRESSOR
a.
Inspect for security of attachment and oil leaks.
21
b.
Inspect drive belt for deterioration, wear and
proper tension.
21
c.
Check for proper compressor oil level if oil
leak indications are present.
12
d.
Inspect the integrity and security of the clutch
assembly. Remove the belt from the
compressor. Inspect for freedom of rotation,
bearing roughness and free play (wobble).
Check for corrosion or evidence of
inappropriate wear (belt dust, metal shavings).
Install belt on compressor.
21
Nose Avionics Compartment
ATA REFERENCE
C.
MECH
1.
VACUUM REGULATOR VALVE FILTER - Inspect
for blockage.
12
2.
INSTRUMENT AIR FILTER - Inspect for cleanliness.
12
Nose Landing Gear Area
ATA REFERENCE
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Page 1 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
1.
D.
ELECTRICAL WIRING and EQUIPMENT - Inspect
all exposed electrical wiring and equipment for
chafing, damage and security of attachment.
AC43.13-1B/2B
2.
FORWARD EVAPORATOR FILTER - Inspect for
cleanliness.
12
3.
REFERIGERANT LINES, SERVICE VALVES and
HIGH-PRESSURE RELIEF VALVES - Inspect lines
and valves for leakage, damage, attachment and
surface corrosion.
21
Nose Gear
ATA REFERENCE
1.
2.
E.
INSP
WHEEL
a.
Inspect wheel for wear, damage and corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
32
CMM
a.
Inspect for wear and deterioration.
12
CMM
b.
Check for correct inflation.
TIRE
12-20-15, 301
CMM
3.
SHIMMY DAMPER - Inspect for leaks, security and
attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for
cracks, damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect steering
stop for damage or distortion.
6.
LANDING and TAXI LIGHTS - Inspect for broken
lenses or bulbs.
33
7.
NOSE GEAR LOWER DRAG LEG - Remove nose
gear drag brace bolt and inspect lower drag leg
hole for corrosion and wear.
32
8.
MECH
32
NOSE GEAR ACTUATOR
a.
Inspect actuator support brackets for damage,
cracks and loose or missing fasteners.
32
b.
Inspect actuator and plumbing for leakage.
32
Flight Compartment
ATA
REFERENCE
1.
MECH
INSP
WINDSHIELD
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
2.
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal (Silicone) for
debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal
(Polysulfide) for debonding, cracks or wear.
56
WINDOWS
a.
Inspect exterior surface of cockpit side
windows for scratches, cracks, chips, excess
crazing or other damage.
56
Inspect for any contact of the milled edge of the
window with the airframe skin. Correct window
contact by reinstalling and recentering the
window in the airframe opening.
56
Inspect for any damage from paint strippers,
solvents or any unapproved sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for damage
and wear.
25
5.
VENTILATION BLOWER - Inspect for dirt, grease,
moisture and security of attachment. Rotate blower
by hand and make sure that it rotates freely. Check
for noise or evidence of worn bearings. Turn on the
blower and check for noise or vibration.
21
b.
c.
6.
HEATING SYSTEM
CAUTION:
Prior to installing pilot's compartment floor
panels, visually inspect the entire length of the
elevator control cable in this area to assure
adequate clearance between the cable and
electrical wiring, bleed air ducts, bleed air duct
clamps, and structural components to prevent
chaffing and wear.
F.
a.
Check all ducts for damage and deterioration.
21
b.
Check bleed air ducts for damage, insulation
and adequate clearance of electrical wiring
and control cables.
21
Cabin Section
ATA REFERENCE
1.
2.
WINDOWS - Inspect exterior surface of windows for
deep scratches, cracks, chips and excessive
crazing or other damage.
56
ROTATING or FLASHING BEACON - Inspect for
cracked or broken lenses.
33
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MECH
INSP
Page 3 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
G.
3.
ACCESS DOORS - Inspect for fit and attachment.
06-50-00, 001
4.
OUTFLOW and SAFETY VALVES - Drain outflow
valve control line.
21
5.
SEAT TRACKS - Inspect seat tracks for damage
and wear.
25-20-00, 201
6.
PRESSURIZATION DUCTS - Inspect for security of
attachment.
21
7.
UPHOLSTERY PANELS - Inspect for security of
attachment.
25
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and inspect.
2.
ELT BATTERY
a.
Inspect for leakage, corrosion or loose
connections.
25
b.
Determine remaining useful life.
25
NAVIGATION LIGHTS and ROTATING (Flashing)
BEACONS - Inspect for broken or cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security of
attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the drain
holes in the bottom of the ventral fin for obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration,
damage and attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect the
drain holes for obstructions.
27
8.
STATIC WICKS
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
MECH
INSP
EMPENNAGE and CONTROL SURFACES
a.
Check elevator trim tab free play.
27-30-18, 601
b.
Check rudder trim tab free play.
27-20-19, 601
c.
Inspect elevator and rudder hinge brackets
and their spar attach areas.
10. OXYGEN SYSTEM - Inspect plumbing for security
of attachment.
H.
INSP
53-10-00, 601
3.
9.
MECH
27
35
Left-Hand Outboard Wing
ATA REFERENCE
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Page 4 of 20
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the wing
center section and outboard wing upper attachment
fittings.
SIRM
3.
4.
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
FUEL TANKS and VENTS
a.
Inspect the exterior of the wing for leaks.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing or
flexibility, splits, cracks, or distortion.
28
Inspect exterior openings of vents for
obstructions.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
7.
STATIC WICKS
c.
I.
a.
Inspect for damage and security of attachment.
b.
Check for proper bonding to the airplane.
06-50-00, 001
23-60-00, 601
20
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
Inspect the exterior of the center section for
leaks.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for
flexibility, splits, cracks, or distortion.
28
3.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
06-50-00, 001
4.
HYDRAULIC LANDING GEAR ACCUMULATOR,
FLUID RESERVOIR and ALL PLUMBING
Inspect for damage, security of attachment and
leaks.
Copyright © Textron Aviation Inc.
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INSP
28
a.
a.
MECH
32
Page 5 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
b.
J.
Check for proper fluid level in the fluid
reservoir.
12
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
K.
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion and
security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
AC43.13-1B/2B
7.
INSP
MECH
INSP
WHEELS
2.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Check actuators for leakage.
32
MAIN GEAR BUMPER BLOCK (Airplanes LJ1085, LJ-1088 and After) - Inspect the bumper
block for security of attachment. Check for disbonding or gaps in the adhesive bond line.
57-10-02, 201
Left-Hand Engine
ATA
REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall
filter for evidence of foreign matter, corrosion or
microbiological growth in the fuel system. If any
microbiological growth is found, use BIOBOR JF or
Kathon FP 1.5 additive.
12
3.
PROPELLERS
a.
Inspect for damage and attachment (spinner
removal required).
Copyright © Textron Aviation Inc.
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61
Page 6 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between
the brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct
adjustment, evidence of binding and security of
attachment.
76
Inspect mechanical feedback ring, stop rods
and springs for damage.
61
76
4.
HIGH PRESSURE FUEL PUMP FILTERS - Inspect
the engine-driven high pressure fuel pump filters.
P&W
5.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
6.
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT
- Inspect for fretting and/or corrosion when replacing
outlet filter.
P&W
COWLING - Remove entire cowling and inspect skin,
structure and attaching hardware for wear, damage
and corrosion.
71
e.
7.
8.
9.
OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
79
b.
Inspect drain plug for leakage, security and
safety wire.
79
AFT COWLING ACCESS DOOR LATCHES Check adjustment of latches.
71
10. FIRESEALS - Inspect for condition.
71
11. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage
and corrosion.
78
b.
Inspect the exhaust system and visible portions
of the power turbine for burning, distortion,
damage and cracks.
P&W
12. ENGINE and PROPELLER CONTROLS
a.
b.
Check controls and associated equipment for
binding, stiff operation, full travel and friction
lock.
76
Inspect controls, bolts, nuts, cotter pins and
safeties for corrosion, damage and attachment.
NOTE:
Special attention should be made to the
cambox.
Copyright © Textron Aviation Inc.
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76
Page 7 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
c.
Inspect control cables for damage such as
crimps, cuts, abrasions or tight bends. If exterior
covering is ruptured, perform leak test.
12
13. CONTROL CABLE BOOTS - Inspect the control
cable boots for excessive compression, twist, wear
or aging which could cause binding.
76
14. STARTER-GENERATOR - Inspect one set of
brushes for indications of excessive wear or damage
(determine wear by observing diagonal groove on
brush).
24-30-05, 601
15. MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal
particles and damage. Perform the MAGNETIC
CHIP DETECTOR INSPECTION procedure.
12
79-30-05, 401
b.
Check light in annunciator panel for proper
operation. Perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST procedure.
12-10-03, 301
16. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's
manual.
P&W
b.
Inspect engine in accordance with the
instructions found in the engine manufacturer's
manual.
P&W
17. IGNITION SYSTEM
a.
Inspect exciter and electrical harness for
damage and security of attachment.
P&W
b.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
18. SPARK IGNITER PLUGS - Inspect the igniter plugs
as described in the engine maintenance manual.
P&W
19. FUEL PURGE SYSTEM
a.
Remove fuel purge system air tank and inspect.
Clean as required.
71
b.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
c.
Remove the fuel purge system check valves.
Inspect, pressure flush and perform internal
leakage test. Replace as required.
71
Perform the fuel purge system flow
divider/purge valve leakage test. Replace as
required.
71
d.
20. ENGINE TRUSS MOUNT ASSEMBLY
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Page 8 of 20
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
a.
Inspect for cracks, dents, chafing and corrosion.
Special attention should be made to areas
around clamps.
71
b.
Inspect vibration isolators (mounts) for
deterioration, damage and attachment.
71
21. INERTIAL ENGINE ANTI-ICER
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
Check main and standby actuator motors and
limit switches for operation and correct
adjustment.
12
30
22. ENGINE FIRE DETECTION SYSTEM (If installed) Check all fire detectors for sensitivity and continuity.
26
23. AUTOFEATHER and AUTO-IGNITION PRESSURE
SWITCHES - (If Installed) Inspect security of
attachment, leakage and electrical connection for
security.
61
74
24. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of
electrical connectors and wiring.
61
25. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical
connectors and wiring.
61
26. ENVIRONMENTAL BLEED AIR FLOW CONTROL
UNIT - Inspect valve and associated equipment,
electrical wiring and ducts for damage, security of
connections and attachment.
21
27. INDUCTION SYSTEM and COMPRESSOR INLET Inspect the air inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet
screen and inspect the compressor inlet area, struts,
first stage blades and vanes for dirt deposits,
corrosion, erosion, cracks and damage by foreign
objects.
P&W
28. ENGINE FIRE EXTINGUISHER (If Installed)
L.
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26
Right-Hand Outboard Wing
ATA REFERENCE
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
Page 9 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the wing
center section and outboard wing upper attachment
fittings.
3.
4.
28
SIRM
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
FUEL TANKS and VENTS
33
a.
Inspect exterior openings of vents for
obstructions.
b.
Inspect fuel cap for damage and attachment.
28
c.
Inspect the exterior of the wing for leaks.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
7.
STATIC WICKS
a.
Inspect for damage and security of attachment.
b.
Inspect for proper bonding to the airplane.
06-50-00, 001
23-60-00, 601
20
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
Inspect the exterior of the center section for
leaks.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for
flexibility, splits, cracks, or distortion.
28
3.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
06-50-00, 001
4.
BATTERY
a.
Service as required.
12
b.
Remove battery and inspect the battery box,
cables and vent tubes for deterioration or
obstructions (LJ-1063 thru LJ-1533).
24
Retain printed data for historical reference only. For future maintenance, use only current data.
INSP
28
a.
Copyright © Textron Aviation Inc.
MECH
Page 10 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
c.
N.
Remove battery and inspect the battery box
and cables for deterioration (LJ-1534 and
After).
24
Right-Hand Main Landing Gear Area
ATA REFERENCE
1.
O.
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion and
security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
AC43.13-1B/2B
7.
INSP
MECH
INSP
WHEELS
2.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage.
32
MAIN GEAR BUMPER BLOCK (Airplanes LJ1085, LJ-1088 and After) - Inspect the bumper
block for security of attachment. Check for disbonding or gaps in the adhesive bond line.
57-10-02, 201
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the
firewall filter for evidence of foreign matter,
corrosion or microbiological growth in the fuel
system. If any microbiological growth is found, use
BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS
Copyright © Textron Aviation Inc.
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Page 11 of 20
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
a.
Inspect for damage and attachment (spinner
removal required).
61
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between
the brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct
adjustment, evidence of binding and security
of attachment.
76
Inspect mechanical feedback ring, stop rods
and springs for damage.
61
76
4.
HIGH PRESSURE FUEL PUMP FILTERS - Inspect
the engine-driven high pressure fuel pump filters.
P&W
5.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
6.
ENGINE-DRIVEN FUEL PUMP COUPLING
SHAFT - Inspect for fretting and/or corrosion when
replacing outlet filter.
P&W
COWLING - Remove entire cowling and inspect
skin, structure and attaching hardware for wear,
damage and corrosion.
71
e.
7.
8.
9.
OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
79
b.
Inspect drain plug for leakage, security and
safety wire.
79
AFT COWLING ACCESS DOOR LATCHES Check adjustment of latches.
71
10. FIRESEALS - Inspect for condition.
71
11. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage
and corrosion.
b.
Inspect the exhaust system and visible
portions of the power turbine for burning,
distortion, damage and cracks.
P&W
12. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for
binding, stiff operation, full travel and friction
lock.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
76
Page 12 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
b.
Inspect controls, bolts, nuts, cotter pins and
safeties for corrosion, damage and
attachment.
NOTE:
Special attention should be made to the
cambox.
c.
76
Inspect control cables for damage such as
crimps, cuts, abrasions or tight bends. If
exterior covering is ruptured, perform leak test.
76
13. CONTROL CABLE BOOTS - Inspect the control
cable boots for excessive compression, twist, wear
or aging which could cause binding.
76
14. STARTER-GENERATOR - Inspect one set of
brushes for indications of excessive wear or
damage (determine wear by observing diagonal
groove on brush).
24-30-05, 601
15. MAGNETIC CHIP DETECTOR (If Installed)
a.
b.
Remove and visually inspect plug for metal
particles and damage. Perform the
MAGNETIC CHIP DETECTOR INSPECTION
procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. Perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
16. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's
manual.
P&W
b.
Inspect engine in accordance with the
instructions found in the engine manufacturer's
manual.
P&W
17. IGNITION SYSTEM
a.
Inspect exciter and electrical harness for
damage and security of attachment.
P&W
b.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
18. SPARK IGNITER PLUGS - Inspect the igniter plugs
as described in the engine maintenance manual.
P&W
19. FUEL PURGE SYSTEM
a.
Remove fuel purge system air tank and
inspect. Clean as required.
71
b.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 13 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
c.
d.
Remove the fuel purge system check valves.
Inspect, pressure flush and perform internal
leakage test. Replace as required.
71
Perform the fuel purge system flow
divider/purge valve leakage test. Replace as
required.
71
20. ENGINE TRUSS MOUNT ASSEMBLY
a.
b.
71
Inspect for cracks, dents, chafing and
corrosion. Special attention should be made to
areas around clamps.
71
Inspect vibration isolators (mounts) for
deterioration, damage and attachment.
71
21. INERTIAL ENGINE ANTI-ICER
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
Check main and standby actuator motors and
limit switches for operation and correct
adjustment.
12
30
22. ENGINE FIRE DETECTION SYSTEM (If installed) Check all fire detectors for sensitivity and continuity.
26
23. AUTOFEATHER and AUTO-IGNITION PRESSURE
SWITCHES - (If Installed) Inspect security of
attachment, leakage and electrical connection for
security.
61
74
24. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of
electrical connectors and wiring.
61
25. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical
connectors and wiring.
61
26. ENVIRONMENTAL BLEED AIR FLOW CONTROL
UNIT - Inspect valve and associated equipment,
electrical wiring and ducts for damage, security of
connections and attachment.
21
27. INDUCTION SYSTEM and COMPRESSOR INLET
- Inspect the air inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet
screen and inspect the compressor inlet area,
struts, first stage blades and vanes for dirt deposits,
corrosion, erosion, cracks and damage by foreign
objects.
P&W
28. ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
26
Page 14 of 20
Print Date: Thu Jan 11 11:04:03 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
P.
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26
Landing Gear Retraction
ATA REFERENCE
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly cycle
the landing gear, use only an external power source
capable of delivering and maintaining 28.25 ± 0.25 volts
throughout the extension and retraction cycles when
performing the landing gear retraction inspection.
NOTE:
The hydraulic landing gear system pump may cavitate
and not operate properly during ground use of the
hydraulic power pack for retraction and/or extension of
the landing gear. To prevent this, an exterior supply of
dry air at 18 to 20 psi must be applied to the power pack
reservoir to prevent cavitation. If an external air supply is
not available, use an external hydraulic pressure source.
(Ref. OPERATING THE LANDING GEAR USING THE
POWER PACK, Chapter 32).
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction system
for proper operation of all components through at
least two complete cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and
rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
5.
WARNING HORN - Check for proper operation.
32
6.
MAIN GEAR DOWNLOCKS - Check locking
mechanism for positive engagement in extended
position.
32
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
7.
SAFETY SWITCH - Check for security and proper
operation.
32
8.
ACTUATORS - Check for noise, binding and
proper rigging.
32
9.
EMERGENCY EXTENSION - Check system for
freedom of operation and positive engagement of
downlocks.
32
10. PLACARDS - Check that all placards are in place
and are legible.
Q.
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to
be applied during start and run of the engine. Refer to
the King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual for the engine start and
run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper
operation.
2.
CROSSFEED VALVE - Check for proper
operation.
3.
BOOST PUMPS - Check for proper operation.
4.
STARTER-GENERATOR
5.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
6.
ENGINE OIL - Check for proper pressure and
temperature limits.
7.
FUEL QUANTITY GAGES - Check for proper
operation.
8.
INTERSTAGE TURBINE TEMPERATURE - Check
for correct limits on engine start.
9.
VACUUM SYSTEM - Check for correct limits.
10. PNEUMATIC PRESSURE GAGE - Check for
correct pressure.
11. GYRO INSTRUMENTS (LJ-1063 thru LJ-1846, LJ1848 thru LJ-1852) - Check for erratic or noisy
operation.
12. PROPELLERS - Perform low pitch torque check.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
13. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
14. PROPELLER SYNCHROPHASER - Refer to
FUNCTIONAL TEST and confirm proper
synchronization.
61-23-00, 601
61
15. PROPELLER GOVERNOR - Check governor
operation (including feathering and reversing).
16. IDLE RPM - Check for correct rpm (both high and
low rpm).
17. AC INVERTERS (LJ-1063 thru LJ-1846, LJ-1848
thru LJ-1852) - Check for proper operation.
18. RUDDER BOOST - Check for proper operation.
27
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper
operation and cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for proper
operation and cycling.
22. ELECTRICAL SYSTEM
a.
Perform functional checks (LJ-1063 thru LJ1846, LJ-1848 thru LJ-1852).
24-51-00, 601
b.
Perform functional checks (LJ-1847, LJ-1853
and After).
24-60-00, 601
23. ENVIRONMENTAL SYSTEM - Check for proper
operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation as
outlined in the applicable King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane
Flight Manual Supplement.
25. STALL WARNING - Check for proper operation.
26. ENGINE FIRE DETECTORS (If Installed) - Perform
system test according to instructions found in the
King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) Perform system test according to instructions found
in the King Air 90 Pilot's Operating Handbook and
FAA Approved Airplane Flight Manual.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
28. PRESSURIZATION SYSTEM - Check for proper
operation.
NOTE:
Refer to the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual and perform system test.
29. CONDITION LEVER - Check for clean shutdown
atIDLE-CUT-OFF.
30. PITOT TUBE - Check for proper heating at the unit
and for obstructions.
31. LANDING and TAXI LIGHTS - Check for proper
operation.
32. OUTBOARD WING LIGHTS (Right and Left) Check proper operation of all navigation and strobe
(if installed) lights.
33. COCKPIT LIGHTS - Check for proper operation.
34. EFIS COOLING BLOWERS (If installed) - Check
for proper operation.
35. ELECTRIC ELEVATOR TRIM - Check for proper
operation.
36. ENGINE and PROPELLER CONTROLS - Check
for freedom of movement, full travel and friction-lock
operation.
37. STATIC SYSTEM - Inspect alternate air valve for
operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational check.
39. THRESHOLD LIGHT - Check for proper operation.
40. CABIN and COMPARTMENT LIGHTS - Check for
proper operation.
41. PILOT'S and COPILOT'S SEATS and SEAT
BELTS - Check seat adjustment mechanism and
shoulder harness inertia reel for operation.
42. CABIN SEATS and SEAT BELTS - Check seat
adjustment mechanism and shoulder harness
inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps do not fold too soon
and that they fold properly without interference.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
b.
Check CABIN DOOR unlock annunciator for
proper operation.
c.
Inspect cabin door damper for leakage and
proper operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and latch
mechanism for proper operation.
52
b.
Check that latches open and close freely.
52
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for
smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS Check for proper operation.
47. AILERON (LH and RH) - Check for freedom of
movement.
48. AILERON TRIM TAB - Check trim tab actuator for
smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) Check the operation of the heated vents. They
should be warm to the touch.
50. STALL WARNING HEAT - Check for proper
operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH
and RH) - Check flaps for noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper operation.
53. EXTERNAL POWER RELAY - Check for proper
operation.
R.
54. AVIONICS COOLING BLOWER - Check for proper
operation.
34
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS Check for smoothness of operation. Make sure
movement is between inner and outer bushings.
27
56. AUTOPILOT - DCU AURAL WARNING (LJ-1847,
LJ-1853 and After) - Perform the Autopilot Data
Concentrator Unit (DCU) Aural Warning Inspection
procedure.
22
57. STALL WARNING - AUTOPILOT DISCONNECT
(LJ-1847, LJ-1853 and After) - Perform the Stall
Warning Autopilot Disconnect Inspection
procedure.
22
Post Inspection Items
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-02 (Rev D0)
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as
required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or
FLIGHT TEST - Check for oil leaks, security and
attachment of all components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE
BULLETINS - Must be reviewed and complied with
as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
Make sure Special Inspection requirements
are complied with at the appropriate intervals.
05-25-05, 601
b.
Perform Continuous Corrosion Control
Inspection if required by the environmental
conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies noted
by the pilot must be checked and corrected as
required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check
for proper operation and make sure ELT is ARMED
before returning airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper
pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If
Installed) Make sure all necessary emergency and
survival equipment are installed in the airplane and
serviceable.
10. PLACARDS - Determine that all required placards
are in place and legible.
MECH
INSP
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books are
filled out properly.
2.
Inspection Completed
I certify that the Phase 2 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 3) - INSPECTION/CHECK
(LJ-1063 AND AFTER)
Scheduled Inspection Program (Phase 3)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure, 27-50-07,
501).
Nose Section
NOTE:
B.
NOTE:
C.
There are no inspections required in this section during this phase.
Nose Avionics Compartment
There are no inspections required in this section during this phase.
Nose Landing Gear Area
ATA REFERENCE
1.
D.
ELECTRICAL WIRING and EQUIPMENT - Inspect
all exposed electrical wiring and equipment for
chafing, damage and security of attachment.
MECH
INSP
MECH
INSP
20-00-00, 601
Nose Gear
ATA REFERENCE
1.
2.
WHEEL
a.
Inspect wheel for wear, damage and
corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
32
CMM
TIRE
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
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12
CMM
12-20-15, 301
CMM
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
E.
3.
SHIMMY DAMPER - Inspect for leaks, security and
attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for
cracks, damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect steering
stop for damage or distortion.
6.
LANDING and TAXI LIGHTS - Inspect for broken
lenses or bulbs.
33
7.
STEERING LINKAGE - Inspect nose gear steering
mechanism and attaching hardware for wear,
damage and corrosion.
32
32
Flight Compartment
ATA REFERENCE
1.
2.
MECH
INSP
WINDSHIELD
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal (Silicone) for
debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal
(Polysulfide) for debonding, cracks or wear.
56
d.
Inspect windshield attachment screws for 20
inch-pounds of torque.
56
WINDOWS
a.
Inspect exterior surface of cockpit side
windows for scratches, cracks, chips, excess
crazing or any indication of delamination.
56
Inspect for any contact of the milled edge of
the window with the airframe skin. Correct
window contact by reinstalling and recentering
the window in the airframe opening.
56
Inspect for any damage from paint strippers,
solvents or any unapproved sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for damage
and wear.
25
5.
PORTABLE FIRE EXTINGUISHER - Inspect the
bottle for signs of damage and mount for security of
attachment.
26
CMM
6.
SEATS, SEAT BELTS and SHOULDER
HARNESSES - Inspect seat belts and shoulder
harnesses for deterioration or missing components.
25
b.
c.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
7.
BRAKE FLUID RESERVOIR PRESSURE
EQUALIZATION ORIFICE - Clean and flush orifice
of contaminants.
FLIGHT CONTROL CABLE TENSION - Inspect
and record aileron cable tension:
TEMPERATURE:____ °F
CONTROL COLUMN INTERCONNECT CABLE TENSION:
______
1/8 IN. AILERON CABLE TENSION:
LEFT _____ RIGHT_____
32-40-03, 701
8.
9.
27
HEATING SYSTEM
a.
Check all ducts for damage and deterioration.
b.
Check bleed air ducts for damage, insulation
and adequate clearance of electrical wiring
and control cables.
CAUTION:
Prior to installing pilot's compartment
floor panels, visually inspect the entire
length of the elevator control cable in this
area to assure adequate clearance
between the cable and electrical wiring,
bleed air ducts, bleed air duct clamps, and
structural components to prevent chaffing
and wear.
21
21
10. FLIGHT COMPARTMENT AREA - Inspect skin,
structure, seats and attaching hardware for wear,
damage and corrosion. If damage or corrosion is
found in a given area, check the adjacent area.
11. ELECTRICAL WIRING and EQUIPMENT - Inspect
for chafing, damage, proper routing of wire bundles
and security of attachment.
CAUTION:
Prior to installing pilot's compartment floor
panels, visually inspect the entire length of the
elevator control cable in this area to make sure
that there is adequate clearance between the
cable and electrical wiring, bleed air ducts,
bleed air duct clamps, and structural
components to prevent chaffing and wear.
20-00-00, 601
12. RUDDER PEDALS
a.
Inspect rudder pedals for wear, clearance and
attachment.
27
b.
Inspect rudder pedal linkage for wear,
damage, attachment and operation.
27
13. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
a.
b.
c.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley
brackets, etc.) for bulges, splits, bends or
cracks which are conditions for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance and
proper operation. Replace cables that have
more than three broken wires in any given
three-foot cable length or have evidence of
corrosion.
27
20-04-00, 201
(LJ-1063 thru LJ-1400) Visually inspect the
rudder, elevator and trim control cables
between FS 116.00 and FS 147.60. Check for
chafing, fraying, broken strands and adequate
clearance. Pay particular attention to the
clearance where the cable passes the bleed
air duct and any adjacent electrical wiring or
components.
CAUTION:
The travel of the elevator cable in this area
is not sufficient to expose the cable for a
thorough inspection without removal of
the pilot's seat, floorboards, reverse
current relay and/or the generator line
contactor panel. Upon installation of
removed components, inspect all
adjacent electrical wiring and
components for adequate clearance with
control cables.
27
20-04-00, 201
14. BRAKE SYSTEM - Inspect brake system
components and plumbing for leakage and
attachment.
32
15. INSTRUMENT PANEL, PLUMBING and WIRING Inspect instrument panel, subpanels, placards,
shock mounts and instrument plumbing for damage,
attachment, chafing and hoses for hardness or
cracks.
31
16. CONTROL COLUMN
a.
Inspect for wear, damage, corrosion,
attachment and operation.
27
b.
Inspect control wheel adapter for cracks in the
weld area of adapter on forward side of the
control wheel.
27
c.
Inspect control wheel switches for condition
and security of attachment.
27
d.
Perform the CONTROL COLUMN BEARING
SUPPORT INSPECTION procedure.
27-10-05, 601
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
17. PEDESTAL
a.
b.
Inspect pedestal components and plumbing
for damage, attachment, chaffing and hoses
for hardness or cracks.
31
Perform the CONDITION CONTROL CATCH
GATE INSPECTION procedure.
76-17-03, 601
18. PRESSURIZATION CONTROLLER
a.
b.
Inspect for security of attachment, plumbing
and wiring for damage and connection
security.
21
Inspect filter in controller assembly located
within the pedestal.
21
19. ACCESS DOORS - Inspect for fit and attachment.
20. HEATED WINDSHIELD - Inspect windshield
antistatic coating and tab bonding.
06-50-00, 001
56
21. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for
corrosion.
b.
Inspect relief tube outlet area for corrosion.
22. ELECTRICAL LOAD DISTRIBUTION
a.
b.
Perform inspections of the FUEL PANEL
DIODES and HOT BATTERY BUS DIODES
(LJ-1063 thru LJ-1846, LJ-1848 thru LJ-1852).
24-51-00, 601
Perform inspections of the FUEL PANEL
DIODES and HOT BATTERY BUS DIODES
(LJ-1847, LJ-1853 and After).
24-60-00, 601
23. EMERGENCY LANDING GEAR EXTENSION Inspect the emergency extension handle assembly
and linkage from the handle to the emergency
extension pump for proper installation, wear and
security of attachment.
32
24. ENVIRONMENTAL SYSTEM
a.
Inspect ducts for condition and security of
installation.
b.
Check ducts for evidence of thermal leaks
and/or degradation, such as discoloration of
duct insulator, adjacent structure or
components.
c.
Physically inspect ducts by touching ducts,
checking for thermal deterioration,
deformation of the ducts, and proper
connection at the joints.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
F.
d.
Perform the BLEED AIR BYPASS VALVE
OPERATIONAL CHECK procedure.
21-41-07, 601
e.
Perform the FUNCTIONAL TEST OF THE
DUCT SENSE ELEMENT procedure.
21-61-00, 501
f.
Perform the FUNCTIONAL TEST OF THE
CABIN TEMPERATURE CONTROL SYSTEM
procedure.
21-61-00, 501
Cabin Section
ATA REFERENCE
1.
WINDOWS - Inspect exterior surface of windows for
deep scratches, cracks, chips and excessive
crazing or other damage.
56
2.
ROTATING or FLASHING BEACON - Inspect for
cracked or broken lenses.
33
3.
ACCESS DOORS - Inspect for fit and attachment.
06-50-00, 001
4.
OUTFLOW and SAFETY VALVES
a.
Drain outflow valve control line.
21
b.
Inspect plumbing and components for
attachment.
21
c.
Clean and inspect safety valve screen.
Perform the SAFETY VALVE FILTER
CLEANING procedure.
12-20-21, 701
Clean and inspect poppet and seat of both
valves. Perform the appropriate OUTFLOW
AND SAFETY VALVE CLEANING procedure.
12-20-21, 701
Perform functional test of outflow and safety
valves.
21
d.
e.
5.
INSP
SEAT BELTS and SHOULDER HARNESSES
a.
Inspect seats and shoulder harnesses for
deterioration or missing components.
25-20-01, 601
b.
Inspect shoulder harness attachment posts for
cracked, worn, brittle or missing grommet (If
Installed).
25-20-01, 601
6.
SEAT TRACKS - Inspect seat tracks for damage
and wear.
7.
OXYGEN SYSTEM
8.
MECH
25
a.
Test all masks for oxygen flow.
35
b.
Inspect oxygen system installation for damage
and security of attachment.
35
TOILET (If Installed) - Inspect for spillage and
leakage below the toilet.
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38
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
9.
CABIN ENTRANCE DOOR
a.
Inspect the door seal for cuts, abrasions and
security of attachment.
52
b.
Inspect door seal solenoid valve and pressure
regulator valve for security and electrical
connection.
52
c.
Inspect the cabin door support cables for
wear, damage and security.
52
d.
Inspect door latching mechanism and cables
for damage, deterioration and security of
attachment.
52
53
e.
Inspect upper latch hooks and retaining pins
for rigging, wear and damage. Replace pin at
10% diameter wear. (Pin removal required).
52
f.
Inspect upper latch hooks for proper tension.
52
g.
Inspect side latch bolts (bayonets) and rollers
for rigging and freedom of movement.
52
53
h.
Inspect the CABIN DOOR unlock annunciator
switch spring.
52
10. AVIONICS EQUIPMENT and RACKS (If Installed) Inspect avionics equipment and racks for security of
attachment.
53
11. BULKHEADS - Inspect for water traps.
53
12. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley
brackets, etc.) for bulges, splits, bends or
cracks which are conditions for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks,
breaks, attachment, alignment, clearance and
proper operation. Replace cables that have
more than three broken wires in any given
three-foot cable length or have evidence of
corrosion.
27
20-04-00, 201
13. LANDING GEAR POWER PACK and MOTOR
a.
Perform the GEAR-UP AND GEAR-DOWN
PORT FINGER SCREEN CLEANING
procedure.
12-20-35, 301
b.
Perform the LANDING GEAR BLEED AIR
OVERBOARD RELIEF ORIFICE procedure.
12-20-35, 301
c.
Inspect all plumbing attach points for leaks and
security of attachment.
32
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
d.
Inspect the alternate extension hand pump
suction line filter/screen.
32
14. FLAP MOTOR and DRIVES - Inspect for damage
and attachment.
27
15. AILERON QUADRANT REGULATOR (LJ-1306
and After) - Inspect for security, attachment,
operation and travel.
27
16. BELLY DRAIN VALVES - Inspect for possible
obstructions.
53
17. CABIN WINDOW ATTACH FRAMES - Perform
inspection and check for looseness of window
attach frames.
56
18. PNEUMATIC PRESSURE REGULATOR,
VACUUM EJECTOR and DEICER DISTRIBUTION
VALVE - Inspect equipment and plumbing for
security.
21
19. CONTROL CABLE SEALS - Inspect for damage,
security, cleanliness and lubrication.
27
20. AUTOPILOT COMPONENTS - Inspect components
for security of attachment.
22
21. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for
corrosion.
38
20-09-00, 201
b.
Inspect relief tube outlet area for corrosion.
38
20-09-00, 201
22. ANTENNAS - Inspect all external antennas for
leading edge erosion and condition of base seals.
23
23. PORTABLE FIRE EXTINGUISHER - Inspect bottle
for damage and security of attachment.
26-21-00, 001
CMM
24. CABIN DOORS and EMERGENCY EXITS
a.
b.
Inspect skin, structure and attaching hardware
for wear, damage and corrosion. If damage or
corrosion is found in a given area, check the
adjacent area.
20-00-00, 601
Inspect corner areas of emergency exit
(removed) for cracks and abrasion in area of
curvature between seal and outer face of exit.
52
25. EMERGENCY EXITS
a.
Inspect latches for damage and check all
moving parts for proper operation.
52
b.
Check for proper latch adjustment and seal of
closed door.
52
Copyright © Textron Aviation Inc.
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Page 8 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
26. ELECTRICAL WIRING and EQUIPMENT - Inspect
all exposed electrical wiring and equipment for
chafing, damage and security of attachment.
20-00-00, 601
27. ENVIRONMENTAL SYSTEM
a.
Inspect ducts for condition and security of
installation.
21
b.
Check ducts for evidence of thermal leaks
and/or degradation, such as discoloration of
duct insulator, adjacent structure or
components.
21
Physically inspect ducts by touching ducts,
checking for thermal deterioration,
deformation of the ducts, and proper
connection at the joints.
21
c.
G.
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and inspect.
2.
ELT BATTERY
Inspect for leakage, corrosion or loose
connections.
25
b.
Determine remaining useful life.
25
3.
NAVIGATION LIGHTS and ROTATING (Flashing)
BEACONS - Inspect for broken or cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security of
attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the drain
holes in the bottom of the ventral fin for
obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration,
damage and attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect the
drain holes for obstructions.
27
8.
STATIC WICKS
a.
Inspect for damage and security of
attachment.
23
b.
Check for proper bonding to the airplane.
20
Retain printed data for historical reference only. For future maintenance, use only current data.
INSP
53
a.
Copyright © Textron Aviation Inc.
MECH
Page 9 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
9.
FLIGHT CONTROL CABLE TENSION - Inspect
and record elevator, elevator tab, rudder and
rudder tab cable tension:
TEMPERATURE:________ °F
ELEVATOR CABLE TENSION: UP _____DOWN_____
ELEVATOR TAB CABLE TENSION:__________
RUDDER CABLE TENSION: LEFT ____RIGHT ___
27
RUDDER TAB CABLE TENSION: ________
H.
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the wing
center section and outboard wing upper attachment
fittings.
SIRM
3.
4.
INSP
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing or flexibility,
splits, cracks, or distortion.
28
Inspect the exterior of the wing for leaks.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
7.
STATIC WICKS
c.
8.
MECH
06-50-00, 001
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the CHECKING
AILERON TAB FREE PLAY procedure.
27-10-15, 601
9.
FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron and aileron tab cable tension:
TEMPERATURE:_____ °F
3/16" AILERON CABLE TENSION: LEFT______
AILERON TAB CABLE TENSION: ________
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
27
Page 10 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
I.
Left-Hand Wing Center Section
ATA REFERENCE
J.
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
MECH
INSP
MECH
INSP
28
a.
Inspect the exterior of the center section for
leaks.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for
flexibility, splits, cracks, or distortion.
28
3.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
06-50-00, 001
4.
FUEL PUMPS - Inspect the pumps for leaks and
security of attachment.
28
5.
HYDRAULIC LANDING GEAR ACCUMULATOR,
FLUID RESERVOIR and ALL PLUMBING
a.
Inspect for damage, security of attachment and
leaks.
32
b.
Clean and inspect the hydraulic power pack fill
reservoir screen.
12-20-35, 301
32
c.
Check for proper fluid level in the fluid
reservoir.
12
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and plumbing
for wear damage, leaks, corrosion and security of all
components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
20-00-00, 601
6.
MAIN LANDING GEAR ACTUATOR
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Page 11 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
7.
8.
K.
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage of internal
lubricant.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive wear.
CMM
b.
Inspect for security of attach fittings.
32
c.
Inspect downlock bolts for proper torque (fingertight and safety-wired).
CMM
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect wheel well
and gear door structure, all components and
attaching hardware for wear, damage and corrosion.
If damage or corrosion is found, check the adjacent
area.
32
Left-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall
filter for evidence of foreign matter, corrosion or
microbiological growth in the fuel system. If any
microbiological growth is found, use BIOBOR JF or
Kathon FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment(spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
6.
7.
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
Check main and standby actuator motors and
limit switches for operation and correct
adjustment.
12
30
MECH
INSP
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
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Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
a.
b.
L.
Remove and visually inspect plug for metal
particles and damage. Perform the
MAGNETIC CHIP DETECTOR INSPECTION
procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. Perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
Right-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES Determine that the drain holes are open in the wing
center section and outboard wing upper attachment
fittings.
SIRM
3.
4.
INSP
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing or flexibility,
splits, cracks, or distortion.
28
Inspect the exterior of the wing for leaks.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
7.
STATIC WICKS
c.
06-50-00, 001
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the CHECKING
AILERON TAB FREE PLAY procedure.
27
FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron and aileron tab cable tension:
TEMPERATURE:____ °F
3/16" AILERON CABLE TENSION: RIGHT_____
AILERON TAB CABLE TENSION:______
27
8.
MECH
9.
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Page 13 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
Inspect the exterior of the center section for
leaks.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for
flexibility, splits, cracks, or distortion.
28
Inspect the exterior openings of the vents for
obstructions.
28
3.
ACCESS DOORS (Inspection Panels) - Inspect for
fit and attachment.
06-50-00, 001
4.
BATTERY
a.
Service battery as required.
12
b.
Remove battery and inspect the battery box,
cables and vent tubes for deterioration or
obstructions (LJ-1063 thru LJ-1533).
24
Remove battery and inspect the battery box
and cables for deterioration (LJ-1534 and
After).
24
FUEL PUMPS - Inspect the pumps for leaks and
security of attachment.
28
c.
5.
N.
INSP
MECH
INSP
28
a.
c.
MECH
Right-Hand Main Landing Gear Area
ATA REFERENCE
1.
WHEELS
a.
Inspect wheels for wear, damage and
corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and
plumbing for wear damage, leaks, corrosion and
security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT Check strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
20-00-00, 601
Copyright © Textron Aviation Inc.
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Page 14 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
6.
7.
8.
O.
MAIN LANDING GEAR ACTUATOR
a.
Inspect actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or
missing rivets.
32
c.
Inspect actuators for leakage.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive wear.
CMM
b.
Inspect for security of attach fittings.
32
c.
Inspect downlock bolts for proper torque
(finger-tight and safety-wired).
CMM
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect wheel well
and gear door structure, all components and
attaching hardware for wear, damage and
corrosion. If damage or corrosion is found, check
the adjacent area.
32
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall
filter for evidence of foreign matter, corrosion or
microbiological growth in the fuel system. If any
microbiological growth is found, use BIOBOR JF or
Kathon FP 1.5 additive.
12
3.
PROPELLERS - Inspect for damage and
attachment(spinner removal required).
61
4.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
5.
INERTIAL ENGINE ANTI-ICER
6.
7.
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
Check main and standby actuator motors and
limit switches for operation and correct
adjustment.
12
30
MECH
INSP
ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
MAGNETIC CHIP DETECTOR (If Installed)
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Page 15 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
a.
b.
P.
Remove and visually inspect plug for metal
particles and damage. Perform the
MAGNETIC CHIP DETECTOR INSPECTION
procedure.
12
79-30-05, 401
Check light in annunciator panel for proper
operation. Perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST
procedure.
12-10-03, 301
Landing Gear Retraction
ATA REFERENCE
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly cycle
the landing gear, use only an external power source
capable of delivering and maintaining 28.25 ± 0.25 volts
throughout the extension and retraction cycles when
performing the landing gear retraction inspection.
NOTE:
The hydraulic landing gear system pump may cavitate
and not operate properly during ground use of the
hydraulic power pack for retraction and/or extension of
the landing gear. To prevent this, an exterior supply of
dry air at 18 to 20 psi must be applied to the power pack
reservoir to prevent cavitation. If an external air supply is
not available, use an external hydraulic pressure source.
(Ref. OPERATING THE LANDING GEAR USING THE
POWER PACK, Chapter 32).
1.
2.
3.
4.
5.
RETRACT MECHANISM - Check retraction system
for proper operation of all components through at
least two complete cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and
rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
WARNING HORN - Check for proper operation.
32
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Page 16 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
6.
MAIN GEAR DOWNLOCKS - Check locking
mechanism for positive engagement in extended
position.
32
7.
SAFETY SWITCH - Check for security and proper
operation.
32
8.
ACTUATORS - Check for noise, binding and proper
rigging.
32
9.
EMERGENCY EXTENSION - Check system for
freedom of operation and positive engagement of
downlocks.
32
10. PLACARDS - Check that all placards are in place
and are legible.
Q.
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to
be applied during start and run of the engine. Refer to the
King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual for the engine start and
run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper
operation.
2.
CROSSFEED VALVE - Check for proper
operation.
3.
BOOST PUMPS - Check for proper operation.
4.
STARTER-GENERATOR
5.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
6.
ENGINE OIL - Check for proper pressure and
temperature limits.
7.
FUEL QUANTITY GAGES - Check for proper
operation.
8.
INTERSTAGE TURBINE TEMPERATURE - Check
for correct limits on engine start.
9.
VACUUM SYSTEM - Check for correct limits.
10. PNEUMATIC PRESSURE GAGE - Check for
correct pressure.
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Page 17 of 21
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
11. GYRO INSTRUMENTS (LJ-1063 thru LJ-1846, LJ1848 thru LJ-1852) - Check for erratic or noisy
operation.
12. PROPELLERS - Perform low pitch torque check.
76
13. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
61-23-00, 601
14. PROPELLER SYNCHROPHASER - Refer to
FUNCTIONAL TEST and confirm proper
synchronization.
61
15. PROPELLER GOVERNOR - Check governor
operation (including feathering and reversing).
16. IDLE RPM - Check for correct rpm (both high and
low rpm).
17. AC INVERTERS (LJ-1063 thru LJ-1846, LJ-1848
thru LJ-1852) - Check for proper operation.
18. RUDDER BOOST - Check for proper operation.
27
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper operation
and cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for proper
operation and cycling.
22. ELECTRICAL SYSTEM
a.
Perform functional checks (LJ-1063 thru LJ1846, LJ-1848 thru LJ-1852).
24-51-00, 601
b.
Perform functional checks (LJ-1847, LJ-1853
and After).
24-60-00, 601
23. ENVIRONMENTAL SYSTEM - Check for proper
operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation as
outlined in the applicable King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane
Flight Manual Supplement.
25. STALL WARNING - Check for proper operation.
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Page 18 of 21
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
26. ENGINE FIRE DETECTORS (If Installed) - Perform
system test according to instructions found in the
King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) Perform system test according to instructions found
in the King Air 90 Pilot's Operating Handbook and
FAA Approved Airplane Flight Manual.
28. PRESSURIZATION SYSTEM - Check for proper
operation.
NOTE:
Refer to the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual and perform system test.
29. CONDITION LEVER - Check for clean shutdown
atIDLE-CUT-OFF.
30. PITOT TUBE - Check for proper heating at the unit
and for obstructions.
31. LANDING and TAXI LIGHTS - Check for proper
operation.
32. OUTBOARD WING LIGHTS (Right and Left) Check proper operation of all navigation and strobe
(if installed) lights.
33. COCKPIT LIGHTS - Check for proper operation.
34. EFIS COOLING BLOWERS (If installed) - Check for
proper operation.
35. ELECTRIC ELEVATOR TRIM - Check for proper
operation.
36. ENGINE and PROPELLER CONTROLS - Check for
freedom of movement, full travel and friction-lock
operation.
37. STATIC SYSTEM - Inspect alternate air valve for
operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational check.
39. THRESHOLD LIGHT - Check for proper operation.
40. CABIN and COMPARTMENT LIGHTS - Check for
proper operation.
41. PILOT'S and COPILOT'S SEATS and SEAT
BELTS - Check seat adjustment mechanism and
shoulder harness inertia reel for operation.
42. CABIN SEATS and SEAT BELTS - Check seat
adjustment mechanism and shoulder harness inertia
reel for operation.
43. CABIN ENTRANCE DOOR
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Page 19 of 21
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
a.
Check that folding steps (If installed) do not fold
too soon and that they fold properly without
interference.
b.
Check CABIN DOOR annunciator for proper
operation.
c.
Inspect cabin door damper for leakage and
proper operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and latch
mechanism for proper operation.
b.
Check that latches open and close freely.
52
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for
smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS Check for proper operation.
47. AILERON (LH and RH) - Check for freedom of
movement.
48. AILERON TRIM TAB - Check trim tab actuator for
smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) Check the operation of the heated vents. They
should be warm to the touch.
50. STALL WARNING HEAT - Check for proper
operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH
and RH) - Check flaps for noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper operation.
53. EXTERNAL POWER RELAY - Check for proper
operation.
54. AVIONICS COOLING BLOWER - Check for proper
operation.
34
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS Check for smoothness of operation. Make sure
movement is between inner and outer bushings.
27
56. AUTOPILOT DCU AURAL WARNING (LJ-1847, LJ1853 and After) - Perform the AUTOPILOT DATA
CONCENTRATOR UNIT (DCU) AURAL WARNING
INSPECTION procedure.
22
Copyright © Textron Aviation Inc.
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Page 20 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-03 (Rev D0)
57. STALL WARNING - AUTOPILOT DISCONNECT
(LJ-1847, LJ-1853 and After) - Perform the STALL
WARNING AUTOPILOT DISCONNECT
INSPECTION procedure.
R.
22
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as
required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or
FLIGHT TEST - Check for oil leaks, security and
attachment of all components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE
BULLETINS - Must be reviewed and complied with
as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
Make sure Special Inspection requirements
are complied with at the appropriate intervals.
05-25-05, 601
b.
Perform Continuous Corrosion Control
Inspection if required by the environmental
conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies noted
by the pilot must be checked and corrected as
required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check
for proper operation and make sure ELT is ARMED
before returning airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper
pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If
Installed) Make sure all necessary emergency and
survival equipment are installed in the airplane and
serviceable.
10. PLACARDS - Determine that all required placards
are in place and legible.
MECH
INSP
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books are
filled out properly.
2.
Inspection Completed
I certify that the Phase 3 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
Copyright © Textron Aviation Inc.
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Page 21 of 21
Print Date: Thu Jan 11 11:04:05 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
1.
SCHEDULED INSPECTION PROGRAM (PHASE 4) - INSPECTION/CHECK
(LJ-1063 AND AFTER)
Scheduled Inspection Program (Phase 4)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Nose Section
ATA REFERENCE
1.
NOSE SECTION AREA - Inspect skin, structure and attaching
hardware for wear, damage and corrosion. If damage or
corrosion is found in a given area, check the adjacent area.
AC43.13-1B/2B
2.
RADOME - Inspect the exterior surface for cracks in the paint
and fiberglass substrate.
AC43.13-1B/2B
3.
AIR-CONDITIONING COMPRESSOR
4.
B.
a.
Inspect for security of attachment and oil leaks.
21
b.
Inspect drive belt for deterioration, wear and proper
tension.
21
c.
Check for proper compressor oil level if oil leak
indications are present.
12
d.
Inspect the integrity and security of the clutch assembly.
Remove the belt from the compressor. Inspect for freedom
of rotation, bearing roughness and free play (wobble).
Check for corrosion or evidence of inappropriate wear
(belt dust, metal shavings). Install belt on compressor.
21
ELECTRIC HEATER - Inspect the heater, heater elements,
associated wiring and ducting for condition and attachment.
MECH
INSP
MECH
INSP
21
Nose Avionics Compartment
ATA REFERENCE
Copyright © Textron Aviation Inc.
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Page 1 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
1.
VACUUM REGULATOR VALVE FILTER - Inspect for
blockage.
12
2.
INSTRUMENT AIR FILTER - Inspect for cleanliness.
12
3.
AVIONICS EQUIPMENT and RACKS - Inspect for security of
attachment.
4.
AVIONICS COMPARTMENT AREA - Inspect for corrosion,
trapped water and indications of water leakage.
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect all exposed
electrical wiring and equipment for chafing, damage and
security of attachment.
AC43.13-1B/2B
DOORS, FASTENERS and SEAL - Inspect seal for
deterioration and doors and latches for proper adjustment and
fit.
52
6.
C.
Nose Landing Gear Area
ATA REFERENCE
1.
ELECTRICAL WIRING and EQUIPMENT - Inspect all exposed
electrical wiring and equipment for chafing, damage and
security of attachment.
AC43.13-1B/2B
2.
FORWARD EVAPORATOR FILTER - Inspect for cleanliness.
12
3.
REFERIGERANT LINES, SERVICE VALVES and HIGHPRESSURE RELIEF VALVES - Inspect lines and valves for
leakage, damage, attachment and surface corrosion.
21
4.
D.
MECH
INSP
MECH
INSP
NOSE LANDING GEAR AREA - Inspect skin, structure and
attaching hardware for wear, damage and corrosion. If
damage or corrosion is found in a given area, check the
adjacent area.
Nose Gear
ATA REFERENCE
1.
2.
WHEEL
a.
Inspect wheel for wear, damage and corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of damage.
32
CMM
TIRE
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
3.
SHIMMY DAMPER - Inspect for leaks, security and
attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for cracks,
damage or distortion.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
12
CMM
12-20-15, 301
CMM
32
Page 2 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
5.
NOSE GEAR STEERING STOP - Inspect steering stop for
damage or distortion.
6.
LANDING and TAXI LIGHTS
7.
8.
9.
E.
a.
Inspect the lights for broken lenses or bulbs.
33
b.
Confirm correct focus of landing and taxi lights.
33
NOSE GEAR LOWER DRAG LEG - Remove nose gear drag
brace bolt and inspect lower drag leg hole for corrosion and
wear.
32
NOSE GEAR ACTUATOR - Inspect actuator support brackets
for damage, cracks and loose or missing fasteners.
a.
Inspect actuator support brackets for damage, cracks and
loose or missing fasteners.
32
b.
Inspect actuator and plumbing for leakage.
32
NOSE GEAR COMPONENTS - Inspect all components and
attaching hardware for wear, damage and surface corrosion.
32
Flight Compartment
ATA REFERENCE
1.
2.
MECH
INSP
WINDSHIELD
a.
Inspect windshield for cracks and visibility impairment.
56
b.
Inspect windshield weather seal (Silicone) for debonding,
cracks or wear.
56
c.
Inspect windshield weather hump seal (Polysulfide) for
debonding, cracks or wear.
56
WINDOWS
a.
b.
c.
Inspect exterior surface of cockpit side windows for
scratches, cracks, chips, excess crazing or any indication
of delamination.
56
Inspect for any contact of the milled edge of the window
with the airframe skin. Correct window contact by
reinstalling and recentering the window in the airframe
opening.
56
Inspect for any damage from paint strippers, solvents or
any unapproved sealants.
56
3.
ALTERNATE AIR VALVE - Drain off all moisture.
34
4.
SEAT TRACKS - Inspect seat tracks for damage and wear.
25
5.
VENTILATION BLOWER - Inspect for dirt, grease, moisture
and security of attachment. Rotate blower by hand and make
sure that it rotates freely. Check for noise or evidence of worn
bearings. Turn on the blower and check for noise or vibration.
21
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Page 3 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
6.
HEATING SYSTEM
CAUTION:
Prior to installing pilot's compartment floor panels,
visually inspect the entire length of the elevator control
cable in this area to assure adequate clearance between
the cable and electrical wiring, bleed air ducts, bleed air
duct clamps, and structural components to prevent
chaffing and wear.
F.
a.
Check all ducts for damage and deterioration.
21
b.
Check bleed air ducts for damage, insulation and
adequate clearance of electrical wiring and control
cables.
21
Cabin Section
ATA REFERENCE
1.
G.
WINDOWS - Inspect exterior surface of windows for deep
scratches, cracks, chips and excessive crazing or other
damage.
56
2.
ROTATING or FLASHING BEACON - Inspect for cracked or
broken lenses.
33
3.
ACCESS DOORS - Inspect for fit and attachment.
4.
OUTFLOW and SAFETY VALVES - Drain outflow valve control
line.
21
5.
PRESSURIZATION DUCTS - Inspect for security of
attachment.
21
6.
FLAPPER VALVE - Check for proper operation and excessive
air noise.
21
7.
SEAT TRACKS - Inspect seat tracks for damage and wear.
25-20-00, 201
8.
CABIN SECTION AREA - Inspect skin, structure, seats and
attaching hardware for wear, damage and corrosion. If damage
or corrosion is found in a given area, check the adjacent area.
MECH
INSP
06-50-00, 001
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and inspect.
2.
ELT BATTERY
Inspect for leakage, corrosion or loose connections.
25
b.
Determine remaining useful life.
25
3.
NAVIGATION LIGHTS and ROTATING (Flashing) BEACONS
- Inspect for broken or cracked lenses.
33
4.
ACCESS DOORS - Inspect for fit and security of attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the drain holes in the
bottom of the ventral fin for obstructions.
53-10-00, 601
Retain printed data for historical reference only. For future maintenance, use only current data.
INSP
53-10-00, 601
a.
Copyright © Textron Aviation Inc.
MECH
Page 4 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
6.
DEICER BOOTS - Inspect for deterioration, damage and
attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect the drain holes
for obstructions.
27
8.
STATIC WICKS
9.
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
EMPENNAGE and CONTROL SURFACES
a.
Check elevator trim tab free play.
27-30-18, 601
b.
Check rudder trim tab free play.
27-20-19, 601
c.
Inspect skin, structure and attaching hardware for wear,
damage and corrosion. If damage or corrosion is found
in a given area, check the adjacent area.
10. ELECTRICAL WIRING and EQUIPMENT - Inspect for chafing,
damage, proper routing of wire bundles and security of
attachment.
27
AC43.13-1B/2B
11. AVIONICS and AUTOPILOT - Inspect avionics and autopilot
equipment and racks for security, corrosion and signs of
water leakage.
12. VERTICAL STABILIZER - Inspect front and rear spars of the
vertical stabilizer for loose or missing rivets or fasteners.
55
13. CONTROL CABLE SEALS - Inspect for deterioration,
security, cleanliness and lubrication.
27
14. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets, etc.)
for bulges, splits, bends or cracks which are conditions
for replacements.
27
20-04-00, 201
Inspect control system cables, pulleys and associated
equipment for wear, cracks, breaks, attachment,
alignment, clearance and proper operation. Replace
cables that have more than three broken wires in any
given three-foot cable length or have evidence of
corrosion.
27
20-04-00, 201
15. OXYGEN SYSTEM - Inspect plumbing for security of
attachment.
H.
35
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
28
Page 5 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
2.
3.
4.
WING ATTACH FITTING DRAIN HOLES - Determine that the
drain holes are open in the wing center section and outboard
wing upper attachment fittings.
LIGHTS
a.
Inspect the navigation and recognition (if installed) lights
for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked lenses, if
installed.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for obstructions.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
c.
I.
SIRM
5.
DEICER BOOTS - Inspect exterior surface for deterioration,
damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
06-50-00, 001
7.
STATIC WICKS
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
2.
FUEL TANKS and VENTS
Inspect the exterior of the center section for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing for flexibility, splits, cracks, or
distortion.
28
Inspect the exterior openings of the vents for obstructions.
28
J.
3.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
4.
HYDRAULIC LANDING GEAR ACCUMULATOR, FLUID
RESERVOIR and ALL PLUMBING
INSP
MECH
INSP
28
a.
c.
MECH
06-50-00, 001
a.
Inspect for damage, security of attachment and leaks.
12
32
b.
Check for proper fluid level in the fluid reservoir.
12
Left-Hand Main Landing Gear Area
ATA REFERENCE
Copyright © Textron Aviation Inc.
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Page 6 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
1.
a.
Inspect wheels for wear, damage and corrosion.
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
CMM
2.
BRAKES - Inspect brake discs, linings and plumbing for wear
damage, leaks, corrosion and security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and correct
inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT - Check strut for
leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect exposed
wiring and equipment for chafing, damage and proper routing
and security of attachment.
AC43.13-1B/2B
6.
7.
K.
WHEELS
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for damage and wear.
32
b.
Inspect brackets for cracks and loose or missing rivets.
32
c.
Check actuators for leakage.
32
MAIN GEAR BUMPER BLOCK (Airplanes LJ-1085, LJ-1088
and After) - Inspect the bumper block for security of
attachment. Check for dis-bonding or gaps in the adhesive
bond line.
57-10-02, 201
Left-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice system
(spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall filter for
evidence of foreign matter, corrosion or microbiological growth
in the fuel system. If any microbiological growth is found, use
BIOBOR JF or Kathon FP 1.5 additive.
12
3.
MECH
INSP
PROPELLERS
a.
Inspect for damage and attachment (spinner removal
required).
61
b.
Inspect the carbon block pin for freedom of movement.
61
76
c.
Check for no metal-to-metal contact between the brass
ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct adjustment,
evidence of binding and security of attachment.
76
e.
Inspect mechanical feedback ring, stop rods and springs
for damage.
61
76
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Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
4.
HIGH PRESSURE FUEL PUMP FILTERS - Inspect the enginedriven high-pressure fuel pump filters.
P&W
5.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
6.
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT - Inspect
for fretting and/or corrosion when replacing outlet filter.
P&W
7.
COWLING - Remove entire cowling and inspect skin, structure
and attaching hardware for wear, damage and corrosion.
71
8.
OIL COOLER
9.
a.
Inspect oil cooler and plumbing for leakage, damage and
security of attachment.
79
b.
Inspect drain plug for leakage, security and safety wire.
79
AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
10. FIRESEALS - Inspect for condition.
71
71
11. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage and
corrosion.
78
b.
Inspect the exhaust system and visible portions of the
power turbine for burning, distortion, damage and cracks.
P&W
12. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for binding, stiff
operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and safeties for
corrosion, damage and attachment.
NOTE:
Special attention should be made to the cambox.
c.
76
76
Inspect control cables for damage such as crimps, cuts,
abrasions or tight bends. If exterior covering is ruptured,
perform leak test.
76
13. CONTROL CABLE BOOTS - Inspect the control cable boots
for excessive compression, twist, wear or aging which could
cause binding.
76
14. STARTER-GENERATOR - Inspect one set of brushes for
indications of excessive wear or damage (determine wear by
observing diagonal groove on brush).
24-30-05, 601
15. MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal particles and
damage. Perform the MAGNETIC CHIP DETECTOR
INSPECTION procedure.
12
79-30-05, 401
b.
Check light in annunciator panel for proper operation.
Perform the MAGNETIC CHIP DETECTOR
ANNUNCIATOR TEST procedure.
12-10-03, 301
Copyright © Textron Aviation Inc.
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Page 8 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
16. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's manual.
P&W
b.
Inspect engine in accordance with the instructions found in
the engine manufacturer's manual.
P&W
17. ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
18. IGNITION EXCITER
a.
Inspect exciter and electrical harness for damage and
security of attachment.
P&W
b.
Inspect that supply cable and ignition cable connectors
are installed and safety wired.
P&W
19. SPARK IGNITER PLUGS - Inspect the igniter plugs as
described in the engine maintenance manual.
P&W
20. FUEL PURGE SYSTEM
a.
Remove fuel purge system air tank and inspect. Clean as
required.
71
b.
Remove fuel purge tank filter and inspect for corrosion.
Clean as required.
71
c.
Remove the fuel purge system check valves. Inspect,
pressure flush and perform internal leakage test. Replace
as required.
71
Perform the fuel purge system flow divider/purge valve
leakage test. Replace as required.
71
d.
21. ENVIRONMENTAL BLEED AIR FLOW CONTROL UNIT Inspect valve and associated equipment, electrical wiring and
ducts for damage, security of connections and attachment.
21
22. COMPRESSOR INLET - Remove the air inlet screen and
inspect the compressor inlet area, struts, first stage blades and
vanes of dirt deposits, corrosion, erosion, cracks and damage
by foreign objects.
P&W
23. INERTIAL ENGINE ANTI-ICER
L.
a.
Check vane(s) for freedom of movement and correct
travel. Lubrication of linkage and vane hinges may be
necessary.
12
30
b.
Check main and standby actuator motors and limit
switches for operation and correct adjustment.
12
30
Right-Hand Outboard Wing
Copyright © Textron Aviation Inc.
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Page 9 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES - Determine that the
drain holes are open in the wing center section and outboard
wing upper attachment fittings.
SIRM
3.
4.
MECH
INSP
MECH
INSP
LIGHTS
a.
Inspect the navigation and recognition (if installed) lights
for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked lenses, if
installed.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for obstructions.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing or flexibility, splits, cracks, or
distortion.
28
Inspect the exterior of the wing for leaks.
28
c.
5.
DEICER BOOTS - Inspect exterior surface for deterioration,
damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
06-50-00, 001
7.
STATIC WICKS
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of attachment.
2.
FUEL TANKS and VENTS
28
a.
Inspect the exterior of the center section for leaks.
28
b.
Inspect fuel cap for damage and attachment. Inspect the
visible fuel cap packing for flexibility, splits, cracks, or
distortion.
28
3.
ACCESS DOORS (Inspection Panels) - Inspect for fit and
attachment.
4.
BATTERY
06-50-00, 001
a.
Service battery as required.
12
b.
Remove battery and inspect the battery box, cables and
vent tubes for deterioration or obstructions (LJ-1063 thru
LJ-1533).
24
Remove battery and inspect the battery box and cables
for deterioration (LJ-1534 and After).
24
c.
Copyright © Textron Aviation Inc.
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Page 10 of 19
Print Date: Thu Jan 11 11:04:06 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
N.
Right-Hand Main Landing Gear Area
ATA REFERENCE
1.
Inspect wheels for wear, damage and corrosion.
CMM
b.
Inspect wheel bearings and races for wear, pitting,
cracks, discoloration, rust or other indications of
damage.
CMM
2.
BRAKES - Inspect brake discs, linings and plumbing for wear
damage, leaks, corrosion and security of all components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and correct
inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT - Check strut for
leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect exposed
wiring and equipment for chafing, damage and proper routing
and security of attachment.
AC43.13-1B/2B
7.
O.
INSP
MECH
INSP
WHEELS
a.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible damage and
wear.
32
b.
Inspect brackets for cracks and loose or missing rivets.
32
c.
Inspect actuators for leakage of internal lubricant.
32
MAIN GEAR BUMPER BLOCK (Airplanes LJ-1085, LJ-1088
and After) - Inspect the bumper block for security of
attachment. Check for dis-bonding or gaps in the adhesive
bond line.
57-10-02, 201
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice system
(spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall filter for
evidence of foreign matter, corrosion or microbiological
growth in the fuel system. If any microbiological growth is
found, use BIOBOR JF or Kathon FP 1.5 additive.
12
3.
PROPELLERS
a.
Inspect for damage and attachment (spinner removal
required).
61
b.
Inspect the carbon block pin for freedom of movement.
61
76
c.
Check for no metal-to-metal contact between the brass
ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct adjustment,
evidence of binding and security of attachment.
76
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
e.
Inspect mechanical feedback ring, stop rods and springs
for damage.
61
76
4.
HIGH PRESSURE FUEL PUMP FILTERS - Inspect the
engine-driven high-pressure fuel pump filters.
P&W
5.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
6.
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT - Inspect
for fretting and/or corrosion when replacing outlet filter.
P&W
7.
COWLING - Remove entire cowling and inspect skin, structure
and attaching hardware for wear, damage and corrosion.
71
8.
OIL COOLER
9.
a.
Inspect oil cooler and plumbing for leakage, damage and
security of attachment.
79
b.
Inspect drain plug for leakage, security and safety wire.
79
AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
10. FIRESEALS - Inspect for condition.
71
71
11. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage and
corrosion.
P&W
b.
Inspect the exhaust system and visible portions of the
power turbine for burning, distortion, damage and cracks.
P&W
12. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for binding,
stiff operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and safeties for
corrosion, damage and attachment.
NOTE:
Special attention should be made to the cambox.
c.
76
76
Inspect control cables for damage such as crimps, cuts,
abrasions or tight bends. If exterior covering is ruptured,
perform leak test.
76
13. CONTROL CABLE BOOTS - Inspect the control cable boots
for excessive compression, twist, wear or aging which could
cause binding.
76
14. STARTER-GENERATOR - Inspect one set of brushes for
indications of excessive wear or damage (determine wear by
observing diagonal groove on brush).
24-30-05, 601
15. MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal particles and
damage. Perform the MAGNETIC CHIP DETECTOR
INSPECTION procedure.
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12
79-30-05, 401
Page 12 of 19
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
b.
Check light in annunciator panel for proper operation.
Perform the MAGNETIC CHIP DETECTOR
ANNUNCIATOR TEST procedure.
12-10-03, 301
16. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's manual.
P&W
b.
Inspect engine in accordance with the instructions found
in the engine manufacturer's manual.
P&W
17. ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
18. IGNITION EXCITER
a.
Inspect exciter and electrical harness for damage and
security of attachment.
P&W
b.
Inspect that supply cable and ignition cable connectors
are installed and safety wired.
P&W
19. SPARK IGNITER PLUGS - Inspect the igniter plugs as
described in the engine maintenance manual.
P&W
20. FUEL PURGE SYSTEM
a.
Remove fuel purge system air tank and inspect. Clean as
required.
71
b.
Remove fuel purge tank filter and inspect for corrosion.
Clean as required.
71
c.
Remove the fuel purge system check valves. Inspect,
pressure flush and perform internal leakage test. Replace
as required.
71
Perform the fuel purge system flow divider/purge valve
leakage test. Replace as required.
71
d.
21. ENVIRONMENTAL BLEED AIR FLOW CONTROL UNIT Inspect valve and associated equipment, electrical wiring and
ducts for damage, security of connections and attachment.
21
22. COMPRESSOR INLET - Remove the air inlet screen and
inspect the compressor inlet area, struts, first stage blades
and vanes of dirt deposits, corrosion, erosion, cracks and
damage by foreign objects.
P&W
23. INERTIAL ENGINE ANTI-ICER
P.
a.
Check vane(s) for freedom of movement and correct
travel. Lubrication of linkage and vane hinges may be
necessary.
12-20-05, 301
30
b.
Check main and standby actuator motors and limit
switches for operation and correct adjustment.
12-20-05, 301
30
Landing Gear Retraction
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
ATA REFERENCE
MECH
INSP
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly cycle the landing
gear, use only an external power source capable of delivering and
maintaining 28.25 ± 0.25 volts throughout the extension and
retraction cycles when performing the landing gear retraction
inspection.
NOTE:
The hydraulic landing gear system pump may cavitate and not
operate properly during ground use of the hydraulic power pack for
retraction and/or extension of the landing gear. To prevent this, an
exterior supply of dry air at 18 to 20 psi must be applied to the
power pack reservoir to prevent cavitation. If an external air supply
is not available, use an external hydraulic pressure source. (Ref.
OPERATING THE LANDING GEAR USING THE POWER PACK,
Chapter 32).
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction system for proper
operation of all components through at least two complete
cycles.
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of switches.
32
b.
Check wiring for damage and security of connection.
32
UPLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of switches.
32
b.
Check wiring for damage and security of connection.
32
5.
WARNING HORN - Check for proper operation.
32
6.
MAIN GEAR DOWNLOCKS - Check locking mechanism for
positive engagement in extended position.
32
7.
SAFETY SWITCH - Check for security and proper operation.
32
8.
ACTUATORS - Check for noise, binding and proper rigging.
32
9.
EMERGENCY EXTENSION - Check system for freedom of
operation and positive engagement of downlocks.
32
10. PLACARDS - Check that all placards are in place and are
legible.
Q.
32
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
NOTE:
The following Operational Inspection procedures are to be
applied during start and run of the engine. Refer to the King Air 90
Pilot's Operating Handbook and FAA Approved Airplane Flight
Manual for the engine start and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper
operation.
2.
CROSSFEED VALVE - Check for proper operation.
3.
BOOST PUMPS - Check for proper operation.
4.
STARTER-GENERATOR
5.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
6.
ENGINE OIL - Check for proper pressure and temperature
limits.
7.
FUEL QUANTITY GAGES - Check for proper operation.
8.
INTERSTAGE TURBINE TEMPERATURE / INLET
TEMPERATURE - Check for correct limits on engine start.
9.
VACUUM SYSTEM - Check for correct limits.
10. PNEUMATIC PRESSURE GAGE - Check for correct
pressure.
11. GYRO INSTRUMENTS (LJ-1063 thru LJ-1846, LJ-1848 thru
LJ-1852) - Check for erratic or noisy operation.
12. PROPELLERS - Perform low pitch torque check.
76
13. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
61-23-00, 601
14. PROPELLER SYNCHROPHASER - Refer to FUNCTIONAL
TEST and confirm proper synchronization.
61
15. PROPELLER GOVERNOR - Check governor operation
(including feathering and reversing).
16. IDLE RPM - Check for correct rpm (both high and low rpm).
17. AC INVERTERS (LJ-1063 thru LJ-1846, LJ-1848 thru LJ1852) - Check for proper operation.
18. RUDDER BOOST - Check for proper operation.
27
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
20. PROPELLER DEICER - Check for proper operation and
cycling.
CMM
21. SURFACE DEICE SYSTEM - Check for proper operation
and cycling.
22. ELECTRICAL SYSTEM
a.
Perform functional checks (LJ-1063 thru LJ-1846, LJ1848 thru LJ-1852).
24-51-00, 601
b.
Perform functional checks (LJ-1847, LJ-1853 and After).
24-60-00, 601
23. ENVIRONMENTAL SYSTEM - Check for proper operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
24. AUTOPILOT - Check for proper operation as outlined in the
applicable King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual Supplement.
25. STALL WARNING - Check for proper operation.
26. ENGINE FIRE DETECTORS (If Installed) - Perform system
test according to instructions found in the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight
Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) - Perform
system test according to instructions found in the King Air 90
Pilot's Operating Handbook and FAA Approved Airplane
Flight Manual.
28. PRESSURIZATION SYSTEM - Check for proper operation.
NOTE:
Refer to the King Air 90 Pilot's Operating Handbook and
FAA Approved Airplane Flight Manual and perform
system test.
29. CONDITION LEVER - Check for clean shutdown atIDLECUT-OFF.
30. PITOT TUBE - Check for proper heating at the unit and for
obstructions.
31. LANDING and TAXI LIGHTS - Check for proper operation.
32. OUTBOARD WING LIGHTS (Right and Left) - Check proper
operation of all navigation and strobe (if installed) lights.
33. COCKPIT LIGHTS - Check for proper operation.
34. EFIS COOLING BLOWERS (If installed) - Check for proper
operation.
35. ELECTRIC ELEVATOR TRIM - Check for proper operation.
36. ENGINE and PROPELLER CONTROLS - Check for freedom
of movement, full travel and friction-lock operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
37. STATIC SYSTEM - Inspect alternate air valve for operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational check.
39. THRESHOLD LIGHT - Check for proper operation.
40. CABIN and COMPARTMENT LIGHTS - Check for proper
operation.
41. PILOT'S and COPILOT'S SEATS and SEAT BELTS - Check
seat adjustment mechanism and shoulder harness inertia reel
for operation.
42. CABIN SEATS and SEAT BELTS - Check seat adjustment
mechanism and shoulder harness inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps (If installed) do not fold too soon
and that they fold properly without interference.
b.
Check CABIN DOOR annunciator for proper operation.
c.
Inspect cabin door damper for leakage and proper
operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and latch mechanism
for proper operation.
b.
Check that latches open and close freely.
52
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for
smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS - Check for
proper operation.
47. AILERON (LH and RH) - Check for freedom of movement.
48. AILERON TRIM TAB - Check trim tab actuator for
smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) - Check the
operation of the heated vents. They should be warm to the
touch.
50. STALL WARNING HEAT - Check for proper operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH and RH) Check flaps for noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper operation.
53. EXTERNAL POWER RELAY - Check for proper operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
R.
54. AVIONICS COOLING BLOWER - Check for proper
operation.
24
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS - Check for
smoothness of operation. Make sure movement is between
inner and outer bushings.
27
56. PILOT DISPLAY SWITCH (LJ-1847, LJ-1853 and After) Perform the ENGINE INDICATION REVERSION
INSPECTION procedure.
77
57. AUTOPILOT DCU AURAL WARNING (LJ-1847, LJ-1853 and
After) - Perform the AUTOPILOT DATA CONCENTRATOR
UNIT (DCU) AURAL WARNING INSPECTION procedure.
22
58. STALL WARNING - AUTOPILOT DISCONNECT (LJ-1847,
LJ-1853 and After) - Perform the STALL WARNING
AUTOPILOT DISCONNECT INSPECTION procedure.
22
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or FLIGHT
TEST - Check for oil leaks, security and attachment of all
components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE BULLETINS
- Must be reviewed and complied with as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
Make sure Special Inspection requirements are
complied with at the appropriate intervals.
05-25-05, 601
b.
Perform Continuous Corrosion Control Inspection if
required by the environmental conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies noted by the
pilot must be checked and corrected as required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check for proper
operation and make sure ELT is ARMED before returning
airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If Installed)
Make sure all necessary emergency and survival equipment
are installed in the airplane and serviceable.
10. PLACARDS - Determine that all required placards are in
place and legible.
MECH
INSP
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books are filled out
properly.
2.
Inspection Completed
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-04 (Rev D0)
I certify that the Phase 4 Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-05 (Rev D1)
1.
SCHEDULED INSPECTION PROGRAM (SPECIAL) - INSPECTION/CHECK
(LJ-1063 AND AFTER)
Scheduled Inspection Program (Special)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
If two inspection intervals are shown (i.e. 2,400 HRS OR 30 MONTHS) this indicates the inspection
requirement is due at whichever time frame occurs first.
Special Inspections
INSPECTION
INTERVAL
1.
MECH
INSP
LEFT-HAND ENGINE
a.
Perform hot section inspection as required, refer to Pratt
and Whitney Service Bulletin No. 1003 and/or Service
P&W SB 1003, OR SB
Bulletin No. 1803 or subsequent for LJ-1 thru LJ-1062, and 1803, OR SUBSEQUENT
Service Bulletin No. 1803 or subsequent for LJ-1063 and
After and LW-1 and After.
b.
Oil Filter, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
c.
Chip Detector, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
d.
Ignitor Box, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
e.
Ignitor Plugs, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
f.
P3 Filter, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
g.
External Linkages, refer to the appropriate Pratt and
Whitney Maintenance Manual Section 72-00-00.
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FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
Page 1 of 6
Print Date: Thu Jan 11 11:04:08 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-05 (Rev D1)
1,000 HOURS
2.
LEFT-HAND ENGINE OIL FILTER - Replace filter.
3.
LEFT-HAND MAIN GEAR SHOCK ABSORBER ASSEMBLY Inspect for cracks, wear and corrosion interior and exterior
(Disassembly required).
8,000 CYCLES OR 6
YEARS
4.
LEFT-HAND MAIN GEAR DRAG BRACE ASSEMBLY Inspect for cracks, wear and corrosion interior and exterior
(Disassembly required).
8,000 CYCLES OR 6
YEARS
5.
LEFT-HAND MAIN GEAR AXLE ASSEMBLY and TORQUE
KNEES - Inspect for cracks, wear and corrosion interior and
exterior (Disassembly required) (Ref. Component Maintenance
Manual, 32-00-00).
8,000 CYCLES OR 6
YEARS
LEFT-HAND MAIN GEAR ACTUATOR CLEVIS - Inspect clevis
hole for wear Maximum allowable wear of clevis hole is not to
exceed 0.3265 inch (Disassembly required).
1,000 CYCLES
6.
7.
LEFT-HAND MAIN LANDING GEAR WHEELS - Inspect main
wheels in accordance with manufacturer's instructions (Ref.
Component Maintenance Manual, 32-00-00).
8.
LEFT-HAND FLAP FLEXIBLE SHAFT - Inspect for wear and
freedom of operation with both ends disconnected (Ref.
Chapter 27).
5,000 CYCLES
LEFT-HAND WING PANEL UPPER and LOWER MAIN SPAR
CAP - Check for corrosion. Inspect as outlined in the King Air
Series Structural Inspection and Repair Manual (Ref. Chapter
57).
5 YEAR INITIAL/ 1 YEAR
RECURRING
9.
10. RIGHT-HAND ENGINE
a.
Perform hot section inspection as required, refer to Pratt
and Whitney Service Bulletin No. 1003 and/or Service
Bulletin No. 1803 or subsequent.
P&W SB 1003, OR SB
1803, OR SUBSEQUENT
b.
Oil Filter, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
c.
Chip Detector, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
d.
Ignitor Box, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
e.
Ignitor Plugs, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
f.
P3 Filter, refer to the appropriate Pratt and Whitney
Maintenance Manual Section 72-00-00.
g.
External Linkages, refer to the appropriate Pratt and
Whitney Maintenance Manual Section 72-00-00.
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
FIRST 100 HOURS OF
OPERATION FOR A
NEW ENGINE
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King Air 90 Series Maintenance Manual (Rev D1)
05-25-05 (Rev D1)
11. RIGHT-HAND ENGINE OIL FILTER - Replace filter.
1,000 HOURS
12. RIGHT-HAND MAIN GEAR SHOCK ABSORBER ASSEMBLY Inspect for cracks, wear and corrosion interior and exterior
(Disassembly required).
8,000 CYCLES OR 6
YEARS
13. RIGHT-HAND MAIN GEAR DRAG BRACE ASSEMBLY Inspect for cracks, wear and corrosion interior and exterior
(Disassembly required).
8,000 CYCLES OR 6
YEARS
14. RIGHT-HAND MAIN GEAR AXLE ASSEMBLY and TORQUE
KNEES - Inspect for cracks, wear and corrosion interior and
exterior (Disassembly required).
8,000 CYCLES OR 6
YEARS
15. RIGHT-HAND MAIN GEAR ACTUATOR CLEVIS - Inspect
clevis hole for excessive wear. Maximum allowable wear of
clevis hole is not to exceed 0.3265 inch (Disassembly required).
1,000 CYCLES
16. RIGHT-HAND MAIN LANDING GEAR WHEELS - Inspect main
wheels in accordance with manufacturer's instructions (Ref.
Component Maintenance Manual, 32-00-00).
17. RIGHT-HAND FLAP FLEXIBLE SHAFT - Inspect for wear and
freedom of operation with both ends disconnected (Ref.
Chapter 27).
5,000 CYCLES
18. RIGHT-HAND WING PANEL UPPER and LOWER MAIN SPAR
5 YEAR INITIAL/ 1 YEAR
CAP - Check for corrosion. Inspect as outlined in the King Air
RECURRING
Series Structural Inspection and Repair Manual (Ref. Chapter
57).
19. EDGELIGHTED PANEL ASSEMBLIES - Inspect for condition
(Ref. Chapter 33).
2,000 HOURS OR 4
YEARS
20. AIR-CONDITION COMPRESSOR DRIVE BELTS - Check for
proper tension (Ref. Chapter 21).
21. NOSE GEAR SHOCK ABSORBER ASSEMBLY - Inspect for
cracks, wear and corrosion interior and exterior (Disassembly
required).
8,000 CYCLES OR 6
YEARS
22. NOSE GEAR DRAG BRACE ASSEMBLY - Inspect for cracks,
wear and corrosion interior and exterior (Disassembly required).
8,000 CYCLES OR 6
YEARS
23. NOSE GEAR AXLE ASSEMBLY and TORQUE KNEES Inspect for cracks, wear and corrosion interior and exterior
(Disassembly required).
8,000 CYCLES OR 6
YEARS
24. NOSE GEAR ACTUATOR CLEVIS - Inspect clevis hole for
excessive wear (Disassembly required) (Ref. Component
Maintenance Manual, 32-00-00).
1,000 CYCLES
25. NOSE LANDING GEAR WHEEL - Inspect nose wheel in
accordance with manufacturer's instructions (Ref. Component
Maintenance Manual, 32-00-00).
26. ALTIMETER and PITOT and STATIC SYSTEM - Inspect as
required by FAR 91.411 (Ref. Chapter 34 for system check and
leak test).
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24 MONTHS
Page 3 of 6
Print Date: Thu Jan 11 11:04:08 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-25-05 (Rev D1)
27. POWER LEVER DETENT PIN - Inspect for wear. Maximum
allowable wear is 1/3 of pin diameter (Ref. Chapter 76).
1,200 HOURS
28. FLIGHT COMPARTMENT FIRE EXTINGUISHER Hydrostatically test extinguisher (Ref. Chapter 26).
12 YEARS
29. CABIN FIRE EXTINGUISHER - Deleted, Moved to
Airworthiness Limitations Manual, 90-590024-187.
30. ENGINE FIRE EXTINGUISHER - Deleted, Moved to
Airworthiness Limitations Manual, 90-590024-187.
31. WING ATTACHMENT BOLTS
a.
LJ-1063 thru LJ-1084, 1086 and LJ-1087 - Inspect the
eight bolts as outlined in the King Air Series Structural
Inspection and Repair Manual (Ref. Chapter 57).
1,000 HOURS OR 3
YEARS
b.
LJ-1085, LJ-1088 and After - Inspect the eight bolts as
outlined in the King Air Series Structural Inspection and
Repair Manual (Ref. Chapter 57).
5 Years
32. LANDING GEAR HYDRAULIC SYSTEM FILTER AND
PACKING - Replace filter and packings at first 200-hour
inspection and every 1,200 hours or 1,000 cycles thereafter,
whichever occurs first. In addition to these replacement
frequencies, whenever a hydraulic component is replaced, this
filter must be replaced after the system has been checked for
operation. This filter must also be replaced at the next
inspection after component replacement was made (Ref.
Chapter 32).
200 HOURS INITIAL/
1,200 HOURS
RECURRING
33. FIRE EXTINGUISHER SQUIB CARTRIDGE (If Installed) Deleted, Moved to Airworthiness Limitations Manual, 90590024-187.
34. FLIGHT CONTROLS - Inspect all flight control pulley brackets
and castings for cracks, corrosion, wear and attachment (Ref.
20-04-00, 201).
10,000 CYCLES
INITIAL/5,000 CYCLES
RECURRING
35. OXYGEN CYLINDER - DOT 3HT 1850 (Lightweight composite)
- Deleted, Moved to Airworthiness Limitations Manual, 90590024-187.
36. OXYGEN CYLINDER - DOT 3AA 1800 (Standard weight) Deleted, Moved to Airworthiness Limitations Manual, 90590024-187.
37. OXYGEN CYLINDER - DOT 3HT 1850 (Lightweight) - Deleted,
Moved to Airworthiness Limitations Manual, 90-590024-187.
38. COCKPIT VOICE RECORDER UNDERWATER LOCATOR
BEACON (LJ-1353 and After) - Functional test unit and
batteries for proper operation every 24 months. Replace
batteries every 6 years (Ref. Chapter 23).
24 MONTHS/ 6 YEARS
39. ENGINE MOUNT VIBRATION ISOLATORS - Inspect vibration
isolators for deterioration, damage and attachment (Ref.
Component Maintenance Manual, 71-00-00).
ENGINE TBO OR 4,000
HOURS
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
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King Air 90 Series Maintenance Manual (Rev D1)
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40. FUSELAGE INSPECTION - Perform inspection as outlined in
53-10-00, 601.
6,000 CYCLES INITIAL/
3,000 CYCLES
RECURRING
41. WING STRUCTURE - Perform inspection as outlined in the King
Air Series Structural Inspection and Repair Manual (Ref.
Chapter 57).
42. LEAD ACID BATTERY (LJ-1534 and After) - A Battery stored in
an airplane must be boost charged every 90 days.
90 DAYS
43. BATTERY, EMERGENCY CAPACITY TEST (LJ-1534 and
After) - Perform initial test at 12 months or 600 hours whichever
comes first and subsequent test at every 12 months or 200
hours whichever comes first. Replace Battery which does not
pass capacity test.
12 MONTHS OR 600
HOURS INITIAL/ 12
MONTHS OR 200
HOURS SUBSEQUENT
44. DETAILED AILERON INSPECTION (Removal of aileron is
required)
3,600 HRS INITIAL/ 800
HOURS SUBSEQUENT
a.
Inspect the entire assembly for skin cracks and evidence of
corrosion.
b.
Inspect under the hinge fittings for cracks and corrosion
using low power magnification. Pay particular attention to
the areas between the screw holes for cracks.
45. STANDBY POWER SUPPLY BATTERY (PS835) - Check, load
test, and recharge if necessary (Ref. Component Maintenance
Manual, 24-00-00).
6 MONTHS
46. CABIN ALTITUDE WARNING SYSTEM - Perform the CABIN
ALTITUDE WARNING PRESSURE SWITCH TEST procedure
(Ref. 21-30-11, 501).
12 MONTHS
47. SKIN, EXTERIOR AIRFRAME - Inspect exterior skin (including
nose wheel well keels) for cracks and loose and missing
fasteners. If any repetitive damage is found, inspection on the
internal structure for degradation in the local area is required.
10,000 CYCLES
INITIAL/1,000 CYCLES
RECURRING
48. AIRCONDITIONING MOTOR BRUSHES - Inspect
airconditioning motor brushes for damage, wear and arcing.
1,000 HOURS
INITIAL/1,000 HOURS
RECURRING
FIRST SCHEDULED
INSPECTION/ FIRST
SCHEDULED
INSPECTION AFTER
WING ADJUSTMENT
49. WING ATTACH BOLTS - Check wing attach bolts for proper
torque (Ref. King Air Series Structural Inspection and Repair
Manual, Chapter 57).
50. PILOT'S FUEL CONTROL PANEL and LOWER
EDGELIGHTED PANEL, COPILOT'S EDGELIGHTED
CIRCUIT BREAKER PANEL - Inspect for burned out bulbs,
delamination, corrosion, and evidence of moisture ingress
(Panel removal is required).
51. NOSE AND MAIN LANDING GEAR TRUNNION BOLT HOLES
AND DRAG BRACE ATTACH HOLES (Airframe Side) Inspect for cracks, corrosion, damage, and elongation of holes.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
12 MONTHS
8,000 CYCLES OR 6
YEARS BUT NO LATER
THAN THE NEXT
SCHEDULED 6 YEARS
GEAR INSPECTION
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King Air 90 Series Maintenance Manual (Rev D1)
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2.
52. (LJ-1847, LJ-1853 and After) AUTOPILOT SERVO MOUNT
SLIP CLUTCH TEST - Perform the AUTOPILOT SERVO
MOUNT SLIP CLUTCH TEST procedure (Ref. 22-13-19, 501).
12,000 HOURS
53. (LJ-1847, LJ-1853 and After) Perform the ELECTRONIC
STANDBY INSTRUMENT SYSTEM (ESIS) BATTERY
(PS835D) PERIODIC CHECK procedure (Ref. 34-23-07, 201).
3 TO 6 MONTHS
54. (LJ-1847, LJ-1853 and After) Perform the ELECTRONIC
STANDBY INSTRUMENT SYSTEM (ESIS) BATTERY
(PS835D) CAPACITY TEST procedure (Ref. 34-23-07, 201).
ANNUAL
55. ENGINES - Perform the ENGINE - INSPECTION (72-00-00,
Steps 1 through 7, including Table 602 titled Periodic
Inspections, as detailed by the Pratt & Whitney Maintenance
Manual, Part No. 3043512, 03 April 2009 or subsequent.
FIRST 100 HRS OF
OPERATION FOR A
NEW ENGINE
56. Perform the Horizontal Stabilizer (Elevator) Structural Inspection
Procedure as outlined in the King Air Series Structural
Inspection and Repair Manual (Ref. 55-00-13, 201).
10,000 HOURS
INITIAL/5,000 HOURS
RECURRING
57. Perform the Vertical Stabilizer (Rudder) Structural Inspection
Procedure as outlined in the King Air Series Structural
Inspection and Repair Manual (Ref. 55-00-14, 201).
10,000 HOURS
INITIAL/5,000 HOURS
RECURRING
58. FLAPS - Remove the flaps and inspect the flap attach brackets,
flap structure and attachment hardware for wear. Perform the
FLAP TRACK WEAR LIMITS inspection procedure (Ref. 27-5001, 601). Replace all roller bearings with new roller bearings.
3000 CYCLES OR
THREE YEARS
Inspection Completed
I certify that the Special Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-00 (Rev D0)
1.
BIENNIAL SCHEDULED INSPECTION PROGRAMS
(LJ-1063 AND AFTER)
Biennial Scheduled Inspection Program
NOTE:
This inspection is an optional program for aircraft operating 200 hours or less in a 24-Month period (Ref: 0500-00, 001).
NOTE:
Additional inspections may be required by engine or propeller manufactures in their manuals. Refer to the
unscheduled maintenance checks portion of the supplier issued manuals to ensure continued
airworthiness.
A.
B.
C.
D.
The owner/operator is ultimately responsible for maintaining the airplane in an airworthy condition, including compliance with all
applicable Airworthiness Directives as specified in Part 39 of the Federal Aviation Regulations (FAR) under Title 14 of the
Code of Federal Regulations. The owner/operator should select only qualified personnel to maintain the airplane, and ensure
that the airframe and power plant mechanic inspecting the airplane has access to all necessary manuals and service
information as well as to an approved inspection guide.
Airframe and power plant mechanics must have had previous experience in the satisfactory performance of the tasks required
by this inspection before being qualified to supervise, approve, and return to service the airplane or any part thereof in need of
maintenance, preventive maintenance, repair or alteration.
It is further the responsibility of the owner/operator to ensure that the airplane is inspected in conformity with the requirements
covered in 14 CFR Part 91.409 (f) (3) of the Federal Aviation Regulations. This FAR Part covers the requirements concerning
approved airplane inspection programs. Textron Aviation Inc. has prepared the Inspection Program to assist the owner/operator
in meeting the foregoing responsibilities.
It is the responsibility of the owner/operator to obtain specific approval from their local airworthiness authority for any alteration
to the inspection program.
NOTE:
E.
F.
When warranted by service experience or engineering recommendations, an approved maintenance
program, including the inspection intervals, may be changed at any time with the approval of the local
airworthiness authority.
This document is a portion of the publications by which Textron Aviation Inc. provides the inspection requirements and
maintenance schedules for the continued airworthiness of the airframe of your airplane. Remember, maintenance requirements
for some suppliers components (such as engines, propellers, avionics and other equipment) are separately provided by their
respective manuals. Those maintenance requirements and schedules are adopted by reference in the airframe maintenance
instructions for continued airworthiness. Have your maintenance personnel review the equipment installed on your airplane to
ensure that current, up-to-date supplier maintenance publications and manuals are available and that all required maintenance
is scheduled and performed as required under 14 CFR 91.403 (c).
This Inspection Program is provided to enable the owner/operator to inspect and maintain the airplane on an ongoing basis.
Included in the program is a sequence for conducting the program along with suggested times. The times and sequence are
recommendations that may be altered to suit a particular operation. While this program may be used as an outline, detailed
information of the systems and components in the airplane will be found in the various chapters/sections of the maintenance
manual and the pertinent supplier publications. It is also recommended that reference be made to the applicable maintenance
handbooks, service instructions, applicable FAA regulations and publications and supplier's specifications for torque values,
clearances, settings, tolerances and other requirements. This program is not intended to be all-inclusive, for no such program
can replace the good judgement of a certified airframe and power plant mechanic in the performance of his duties.
NOTE:
2.
In addition to the inspections prescribed by this schedule, the altimeter instrument and static system
and all ATC transponders MUST be tested and inspected in compliance with the requirements specified
in 14 CFR 91.411 and 91.413 at 24-month intervals or anytime the system is opened.
NOTE:
Information contained herein is applicable to all Beech King Air 90 airplanes except where differences
are indicated by serial number effectivity.
Special Conditions Cautionary Notice
CAUTION: The time periods in this schedule do not constitute a guarantee the item will reach the period without
malfunction as the aforementioned factors cannot be controlled by the manufacturer.
WARNING: Use only genuine Textron Aviation Inc., or Textron Aviation Inc.-approved parts obtained from Textron
Aviation Inc.-approved sources in connection with the maintenance and repair of Textron Aviation Inc.
airplanes to assure that the airplane is returned to service in a condition at least equal to its original or
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 1 of 4
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-00 (Rev D0)
properly altered condition. Genuine Textron Aviation Inc. parts are produced and inspected under rigorous
procedures to ensure airworthiness and suitability for use in Textron Aviation Inc. airplane applications.
Parts purchased from sources other than Textron Aviation Inc., even though outwardly identical in
appearance, may not have had the required tests and inspections performed, may be different in fabrication
techniques and materials, and may be dangerous when installed in an airplane.
WARNING: Salvaged airplane parts, reworked parts obtained from non- Textron Aviation Inc.-approved sources, or
parts, components, or structural assemblies, the service history of which is unknown or cannot be
authenticated, may have been subjected to unacceptable stresses or temperatures or have other hidden
damage not discernible through routine visual or usual nondestructive testing techniques. This may render
the part, component, or structural assembly, even though originally manufactured by Textron Aviation Inc.,
unsuitable and unsafe for airplane use.
WARNING: Textron Aviation Inc. expressly disclaims any responsibility for malfunctions, failures, damage or injury
caused by use of non- Textron Aviation Inc.-approved parts or procedures.
A.
3.
The time periods for the inspections noted in this schedule are based on normal usage under average environmental
conditions. Airplanes operated for Air Taxi or other than normal operations and airplanes operated in humid tropics, or in cold
damp climates, etc., may need more frequent inspections for wear, corrosion, lubrication and/or lack of maintenance. Under
these adverse conditions, perform periodic inspections in compliance with this guide at more frequent intervals until the
owner/operator can set his own inspection periods based on the contingencies of field experience.
Scheduled Inspection General Information
A.
Inspection Interval Tolerances
To facilitate scheduling inspections, Textron Aviation Inc. authorizes the following inspection interval tolerances:
(1) Biennial Inspection (Calendar-Month Interval)
(a) A tolerance of ±12 days per 12 calendar months is allowed, not to exceed a total of 60 calendar days.
(b) EXAMPLE: AN INTERIM INSPECTION, due on Jan 1, 1998, may be accomplished anytime between Dec 20, 1997
and Jan 13, 1998. A COMPLETE INSPECTION, due on Jan 1, 1998, may be accomplished anytime between Dec 8,
1997 and Jan 25, 1998.
(2) Special Inspection Items - Calendar Date Limited
(a) A tolerance of ±12 days per 12 calendar months is allowed, not to exceed a total of 60 calendar days.
(3) Special Inspection Items - Flight Cycle Limited
(a) A tolerance of ±10% is allowed.
(4) Special Inspection Items - Hourly Limited
(a) A tolerance of ±10% is allowed.
NOTE:
B.
Tolerances specified by suppliers, DOT regulations or FAA regulations take precedence over
inspection intervals and tolerances authorized by Textron Aviation Inc..
Purpose and Use
The Textron Aviation Inc. recommended Beech King Air 90 Inspection Program is provided to maintain the Beech King Air 90
airplanes that are utilized by owners/operators on a continuous basis. The complete program must be accomplished at least
one time every 24 calendar months.
NOTE:
Owners/operators wishing to utilize inspection intervals of less than 200 hours may do so without
obtaining Textron Aviation Inc.'s concurrence. Refer to the latest revision of this form for inspection
procedure details to meet 14 CFR 91.409 (f) (3).
(1) Inspection timetables are as follows:
(a) Interim Inspection: Must be performed at 12 months and every 24 months thereafter.
(b) Complete Inspection: Must be performed at 24 months and every 24 months thereafter.
NOTE:
NOTE:
If aircraft flight profile increases above 200 hours in a 24-month period, owner/operator must
convert to the STANDARD or ALTERNATE phase inspection program.
Textron Aviation Inc. recommends that no aircraft exceed 12 months without completing at
least one phase inspection.
(c) Special Inspections: Although this inspection program is based on 24-month intervals, there are items which require
Copyright © Textron Aviation Inc.
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King Air 90 Series Maintenance Manual (Rev D1)
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more, or less, frequent inspection or whose inspection interval is based on flight time, elapsed calendar time, or
cycles. These unique inspection items and their time intervals are described under SPECIAL INSPECTIONS and
should be reviewed prior to commencing any scheduled inspection.
NOTE:
Textron Aviation Inc.'s recommended Inspection Program in accordance with 14 CFR 91.409
(f) (3) consists of, but is not limited to, inspection items listed in this Inspection Guide, any
applicable Airworthiness Directives issued against the airframe or any equipment installed
therein and conformity to Type Certificate Data Sheet as applicable.
WARNING: Ascertain that all placards are in place and legible whenever the airplane has been painted or
touched up after repairs. Replace any placards that have been defaced or removed.
C.
(2) While this guide may be used as an outline, detailed information of the many systems and components in the airplane will
be found in the various sections/chapters of this Maintenance Manual and the Engine Maintenance Manual. Reference to
the Engine Maintenance Manual is to the Pratt & Whitney Canada PT6A-6 -21 Maintenance Manual. It is also
recommended that reference be made to the applicable supplier maintenance handbooks, Textron Aviation Inc. service
bulletins, applicable FAA Regulations, and supplier bulletins and specifications for torque values, clearances, settings,
tolerances and other requirements. It is the responsibility of the owner/operator to ensure that the airframe and power plant
mechanic inspecting the airplane has access to the previously noted documents as well as to this inspection guide.
(3) Textron Aviation Inc. issues service information for the benefit of owners and fixed-base operators in the form of two
classes of service bulletins. The first class, MANDATORY Service Bulletins (red border) are changes, inspections and
modifications that could affect safety or crashworthiness. Textron Aviation Inc. considers compliance with these service
bulletins to be mandatory. Textron Aviation Inc. also issues a service bulletin having no border designated as either
RECOMMENDED or OPTIONAL in the compliance section within the bulletin. In the case of a RECOMMENDED Service
Bulletin, Textron Aviation Inc. feels the changes, modifications, improvements or inspections will benefit the
owner/operator, and although highly recommended, they are not considered mandatory at the time of issuance. In the case
of OPTIONAL Service Bulletins, the changes, modifications, improvements or inspections compliance is at the
owner/operator's discretion.
(4) In the final analysis it is the responsibility of the owner/operator to ensure that all Textron Aviation Inc. service bulletins
which are pertinent to his particular operation are complied with.
Definitions
(1) The terminology pertaining to the inspection procedures and their use is defined as follows:
(a) Pilot in Command - Pilot in command shall mean the pilot responsible for the operation and safety of the airplane
during the time defined as flight time.
(b) Flight Cycle - A flight cycle is defined as: Engine start-up and increase to full or partial power (as required during a
normal flight), one landing gear retraction and extension and a complete shutdown.
(c) Flight Time - Flight time shall mean the total time from the moment the airplane first moves under its own power for the
purpose of flight until the moment it comes to rest at the next point of landing. ("Block-to-block" time).
(d) Time in Service - Time in Service, as used in computing maintenance and inspection time records, is the time from
the moment the airplane leaves the ground until it touches the ground at the end of the flight.
(e) Preventive Maintenance - Means simple or minor preservative operations and the replacement of small standard
parts not involving complex assembly operations.
(f) Maintenance - Means inspection, overhaul, repair, preservations and the replacement of parts, but excludes
preventive maintenance.
(g) Corrosion - Pitting or a surface breakdown of a material due to chemical or electro-chemical attack by atmosphere,
moisture or other agents.
(h) Wear - Material or part consumed as a result of exposure to operation or usage.
(i) Damaged - Rendered unusable for its intended purpose.
(j) Calendar Time - The time from the date on the "ORIGINAL AIRWORTHINESS CERTIFICATE", which is issued with
each new airplane, to be used as the basis for all TBO or of replacement components.
(k) Special Inspection of components or systems based on calendar time, hours or cycles which do not coincide with the
scheduled inspection.
(l) Unscheduled Maintenance Checks - Inspections and checks for damage after operating the airplane in conditions
which could require unscheduled maintenance, i.e. lightning strikes, hard landing, polluted atmospheric conditions,
Copyright © Textron Aviation Inc.
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King Air 90 Series Maintenance Manual (Rev D1)
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D.
etc.
Discrepancies
(1) Discrepancies that affect the airworthiness of the airplane will require the necessary corrective action to be accomplished
before the airplane is returned to service.
(2) Discrepancies that do not affect the airworthiness of the airplane may, at the discretion of the owner/operator, be carried
over to the next inspection period. All discrepancies thus carried over should be retained in the ship file until corrected.
(3) Discrepancies which occur during flight should be entered on the "In-Flight Work Sheet" by the pilot in command or another
responsible person.
(4) Forms for the "In-Flight Work Sheet", "Scheduled Inspection Work Sheet", and "Overhaul and Replacement Work Sheet"
are provided at the end of subchapter 05-00-00, 001. These forms may be copied for use during each phase of the
inspection.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-01 (Rev D0)
1.
BIENNIAL SCHEDULED INSPECTION PROGRAM (INTERIM) - INSPECTION/CHECK
(LJ-1063 AND AFTER)
Biennial Scheduled Inspection Program (Interim)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to be
applied during start and run of the engine. Refer to the King Air 90
Pilot's Operating Handbook and FAA Approved Airplane Flight
Manual for the engine start and run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper
operation.
2.
CROSSFEED VALVE - Check for proper operation.
3.
BOOST PUMPS - Check for proper operation.
4.
STARTER-GENERATOR
5.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
6.
ENGINE OIL - Check for proper pressure and temperature
limits.
7.
FUEL QUANTITY GAGES - Check for proper operation.
Copyright © Textron Aviation Inc.
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King Air 90 Series Maintenance Manual (Rev D1)
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8.
INTERSTAGE TURBINE TEMPERATURE - Check for
correct limits on engine start.
9.
VACUUM SYSTEM - Check for correct limits.
10. PNEUMATIC PRESSURE GAGE - Check for correct
pressure.
11. GYRO INSTRUMENTS (LJ-1063 thru LJ-1846, LJ-1848 thru
LJ-1852) - Check for erratic or noisy operation.
12. PROPELLERS - Perform low pitch torque check.
76
13. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
61-23-00, 601
14. PROPELLER SYNCHROPHASER - Refer to FUNCTIONAL
TEST and confirm proper synchronization.
61
15. PROPELLER GOVERNOR - Check governor operation
(including feathering and reversing).
16. IDLE RPM - Check for correct rpm (both high and low rpm).
17. AC INVERTERS (LJ-1063 thru LJ-1846, LJ-1848 thru LJ1852) - Check for proper operation.
18. RUDDER BOOST - Check for proper operation.
27
19. AUTO-IGNITION (If Installed)
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper operation and
cycling.
CMM
21. ENGINE INERTIAL ANTI-ICER - Check for proper operation
and rigging.
22. SURFACE DEICE SYSTEM - Check for proper operation
and cycling.
23. ELECTRICAL SYSTEM - Perform functional checks.
24
24. ENVIRONMENTAL SYSTEM - Check for proper operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
25. AUTOPILOT - Check for proper operation as outlined in the
applicable King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual Supplement.
26. STALL WARNING - Check for proper operation.
27. ENGINE FIRE DETECTORS (If Installed) - Perform system
test according to instructions found in the King Air 90 Pilot's
Operating Handbook and FAA Approved Airplane Flight
Manual.
Copyright © Textron Aviation Inc.
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King Air 90 Series Maintenance Manual (Rev D1)
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28. ENGINE FIRE EXTINGUISHERS (If Installed) - Perform
system test according to instructions found in the King Air 90
Pilot's Operating Handbook and FAA Approved Airplane
Flight Manual.
29. PRESSURIZATION SYSTEM - Check for proper operation.
NOTE:
Refer to the King Air 90 Pilot's Operating Handbook and
FAA Approved Airplane Flight Manual and perform
system test.
30. CONDITION LEVER - Check for clean shutdown atIDLECUT-OFF.
31. PITOT TUBE - Check for proper heating at the unit and for
obstructions.
32. LANDING and TAXI LIGHTS - Check for proper operation.
33. OUTBOARD WING LIGHTS (Right and Left) - Check proper
operation of all navigation and strobe (if installed) lights.
34. COCKPIT LIGHTS - Check for proper operation.
35. EFIS COOLING BLOWERS (If installed) - Check for proper
operation.
36. ELECTRIC ELEVATOR TRIM - Check for proper operation.
37. ENGINE and PROPELLER CONTROLS - Check for freedom
of movement, full travel and friction-lock operation.
38. STATIC SYSTEM - Inspect alternate air valve for operation.
34-10-03, 601
39. WINDSHIELD - Perform heated operational check.
40. THRESHOLD LIGHT - Check for proper operation.
41. PILOT'S and COPILOT'S SEATS and SEAT BELTS - Check
seat adjustment mechanism and shoulder harness inertia reel
for operation.
42. CABIN and COMPARTMENT LIGHTS - Check for proper
operation.
43. CABIN SEATS, SEAT BELTS and SHOULDER
HARNESSES - Check seat adjustment mechanism, seat
belts and shoulder harness inertia reel for operation.
44. CABIN ENTRANCE DOOR
a.
Check that folding steps do not fold too soon and that
they fold properly without interference.
b.
Check CABIN DOOR annunciator for proper operation.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 3 of 5
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King Air 90 Series Maintenance Manual (Rev D1)
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c.
Inspect cabin door damper for leakage and proper
operation.
45. EMERGENCY EXIT
a.
Check emergency release handles and latch
mechanism for proper operation.
b.
Check that latches open and close freely.
46. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for
smoothness of operation.
47. REAR FUSELAGE and EMPENNAGE LIGHTS - Check for
proper operation.
48. AILERON TRIM TAB - Check trim tab actuator for
smoothness of operation and attachment.
49. AILERON (LH and RH) - Check for freedom of movement.
50. FUEL TANK HEATED VENTS (LH and RH) - Check the
operation of the heated vents. They should be warm to the
touch.
51. STALL WARNING HEAT - Check for proper operation.
52. FLAPS and ACTUATORS (Inboard, Outboard, LH and RH) Check flaps for noisy or erratic operation.
53. WING ICING LIGHTS - Check for proper operation.
54. ENGINE INDUCTION SYSTEM (LH and RH) - Check the
inertial vane and bypass door for movement with the main
and standby actuator motors.
55. EXTERNAL POWER RELAY - Check for proper operation.
56. ELEVATOR TRIM TAB ACTUATOR BUSHINGS - Check for
smoothness of operation. Make sure movement is between
inner and outer bushings.
B.
27
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or FLIGHT
TEST - Check for oil leaks, security and attachment of all
components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE BULLETINS
- Must be reviewed and complied with as required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
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a.
Ensure Special Inspection requirements are complied
with at the appropriate intervals.
05-25-05, 601
b.
Perform Continuous Corrosion Control Inspection if
required by the environmental conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies noted by the
pilot must be checked and corrected as required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check for
proper operation and make sure ELT is ARMED before
returning airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper
pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If Installed)
Make sure all necessary emergency and survival equipment
are installed in the airplane and serviceable.
10. PLACARDS - Determine that all required placards are in
place and legible.
11-20-00, 201
POH
11. LOGBOOK ENTRY - Make sure that log books are filled out
properly.
2.
Inspection Completed
I certify that the Interim Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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Page 5 of 5
Print Date: Thu Jan 11 11:04:10 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
1.
BIENNIAL SCHEDULED INSPECTION PROGRAM (COMPLETE) - INSPECTION/CHECK
(LJ-1063 AND AFTER)
Biennial Scheduled Inspection Program (Complete)
Owner :
W/O Number :
Date In :
Serial No. :
Date Out :
Reg. No. :
Last Inspection :
Last Inspection Date :
Last Inspection Hours :
Phase :
Hourmeter :
Total Cycles :
Researched By :
Total Time :
LH Eng. S/N :
Total Time :
TSOH :
TSHSI :
Total Cycles :
Cycles SOH :
Cycles SHSI :
RH Eng. S/N :
Total Time :
TSOH :
Total Cycles :
Cycles SOH :
TSHSI :
LH Prop S/N :
LH Prop Total Time :
RH Prop S/N :
Cycles SHSI :
RH Prop Total Time :
TSOH :
TSOH :
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
NOTE:
A.
ATA/GAMA REFERENCE are informational only, unless specificity instructed to perform a task in the
referenced material i.e. (Perform FLAP SAFETY MECHANISM FUNCTIONAL TEST procedure. 27-50-07,
501).
Nose Section
ATA REFERENCE
1.
NOSE SECTION AREA - Inspect skin, structure and
attaching hardware for wear, damage and corrosion. If
damage or corrosion is found in a given area, check
the adjacent area.
2.
RADOME - Inspect the exterior surface for cracks in the
paint and fiberglass substrate.
3.
AIR-CONDITIONING COMPRESSOR
4.
B.
a.
Inspect for security of attachment and oil leaks.
21
b.
Inspect drive belt for deterioration, wear and
proper tension.
21
c.
Check for proper compressor oil level if oil leak
indications are present.
12
d.
Inspect the integrity and security of the clutch
assembly. Remove the belt from the compressor.
Inspect for freedom of rotation, bearing roughness
and free play (wobble). Check for corrosion or
evidence of inappropriate wear (belt dust, metal
shavings). Install belt on compressor.
21
ELECTRIC HEAT - Inspect the heater, heater elements,
associated wiring and ducting for condition and
attachment.
MECH
INSP
21-41-00, 601
Nose Avionics Compartment
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
ATA REFERENCE
1.
VACUUM REGULATOR VALVE FILTER - Inspect for
blockage.
12
2.
INSTRUMENT AIR FILTER - Inspect for cleanliness.
12
3.
AVIONICS EQUIPMENT and RACKS - Inspect for
security of attachment.
4.
AVIONICS COMPARTMENT AREA - Inspect for
corrosion, trapped water and indications of water
leakage.
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing,
damage and security of attachment.
AC43.13-1B/2B
DOORS, FASTENERS and SEAL - Inspect seal for
deterioration and doors and latches for proper
adjustment and fit.
52
6.
C.
INSP
MECH
INSP
MECH
INSP
Nose Landing Gear Area
ATA REFERENCE
1.
ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing,
damage and security of attachment.
AC43.13-1B/2B
2.
FORWARD EVAPORATOR FILTER - Inspect for
cleanliness.
12
3.
REFERIGERANT LINES, SERVICE VALVES and
HIGH-PRESSURE RELIEF VALVES - Inspect lines
and valves for leakage, damage, attachment and
surface corrosion.
21
4.
D.
MECH
NOSE LANDING GEAR AREA - Inspect skin, structure
and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found in a given
area, check the adjacent area.
Nose Gear
ATA REFERENCE
1.
2.
WHEEL
a.
Inspect wheel for wear, damage and corrosion.
32
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
32
CMM
TIRE
a.
Inspect for wear and deterioration.
b.
Check for correct inflation.
Copyright © Textron Aviation Inc.
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12
CMM
12-20-15, 301
CMM
Page 2 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
3.
SHIMMY DAMPER - Inspect for leaks, security and
attachment.
4.
NOSE GEAR BRACE STOP LUGS - Inspect for
cracks, damage or distortion.
5.
NOSE GEAR STEERING STOP - Inspect steering
stop for damage or distortion.
6.
LANDING and TAXI LIGHTS
32
a.
Inspect the lights for broken lenses or bulbs.
33
b.
Confirm correct focus of landing and taxi lights.
33
STEERING LINKAGE - Inspect nose gear steering
mechanism and attaching hardware for wear, damage
and corrosion.
32
8.
NOSE LANDING GEAR STRUT - Check strut for
leakage and correct extension.
32
9.
ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
7.
10. NOSE GEAR LOWER DRAG LEG - Remove nose
gear drag brace bolt and inspect lower drag leg hole
for corrosion and wear.
AC43.13-1B/2B
CMM
11. NOSE GEAR ACTUATOR
E.
a.
Inspect actuator support brackets for damage,
cracks and loose or missing fasteners.
32
b.
Inspect actuator and plumbing for leakage.
32
12. NOSE GEAR COMPONENTS - Inspect all
components and attaching hardware for wear,
damage and surface corrosion.
32
Flight Compartment
ATA REFERENCE
1.
2.
MECH
INSP
WINDSHIELD
a.
Inspect windshield for cracks and visibility
impairment.
56
b.
Inspect windshield weather seal (Silicone) for
debonding, cracks or wear.
56
c.
Inspect windshield weather hump seal
(Polysulfide) for debonding, cracks or wear.
56
d.
Inspect windshield attachment screws for 20 inchpounds of torque.
56
WINDOWS
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Page 3 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
a.
Inspect exterior surface of cockpit side windows
for scratches, cracks, chips, excess crazing or
any indication of delamination.
56
Inspect for any contact of the milled edge of the
window with the airframe skin. Correct window
contact by reinstalling and recentering the window
in the airframe opening.
56
Inspect for any damage from paint strippers,
solvents or any unapproved sealants.
56
SEAT BELTS and SHOULDER HARNESSES Inspect seat belts and shoulder harnesses for
deterioration or missing components.
25
4.
SEAT TRACKS - Inspect seat tracks for damage and
wear.
25
5.
PORTABLE FIRE EXTINGUISHER - Inspect the bottle
for signs of damage and mount for security of
attachment.
26
CMM
6.
UPHOLSTERY PANELS - Inspect for security of
attachment.
7.
ALTERNATE AIR VALVE - Drain off all moisture.
b.
c.
3.
FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron cable tension:
TEMPERATURE:_____ °F
CONTROL COLUMN INTERCONNECT CABLE TENSION:
______
1/8 IN. AILERON CABLE TENSION:
LEFT ______RIGHT______
34
8.
9.
27
FLIGHT COMPARTMENT AREA - Inspect skin,
structure, seats and attaching hardware for wear,
damage and corrosion. If damage or corrosion is
found in a given area, check the adjacent area.
10. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
CAUTION:
Prior to installing pilot's compartment floor
panels, visually inspect the entire length of the
elevator control cable in this area to make sure
that there is adequate clearance between the
cable and electrical wiring, bleed air ducts, bleed
air duct clamps, and structural components to
prevent chaffing and wear.
AC43.13-1B/2B
11. RUDDER PEDALS
a.
Inspect rudder pedals for wear, clearance and
attachment.
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27
Page 4 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
b.
Inspect rudder pedal linkage for wear, damage,
attachment and operation.
27
12. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
c.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacements.
27
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
(LJ-1063 thru LJ-1400) Visually inspect the
rudder, elevator and trim control cables between
FS 116.0 and FS 147.60. Check for chafing,
fraying, broken strands and adequate clearance.
Pay particular attention to the clearance where
the cable passes the bleed air duct and any
adjacent electrical wiring or components.
CAUTION:
The travel of the elevator cable in this area is
not sufficient to expose the cable for a
thorough inspection without removal of the
pilot's seat, floorboards, reverse current
relay and/or the generator line contactor
panel. Upon installation of removed
components, inspect all adjacent electrical
wiring and components for adequate
clearance with control cables.
27
20-04-00, 201
13. BRAKE FLUID RESERVOIR PRESSURE
EQUALIZATION ORIFICE - Clean and flush orifice of
contaminants.
32
14. BRAKE SYSTEM - Inspect brake system components
and plumbing for leakage and attachment.
32
15. INSTRUMENT PANEL, PLUMBING and WIRING Inspect instrument panel, subpanels, placards, shock
mounts and instrument plumbing for damage,
attachment, chafing and hoses for hardness or cracks.
31
16. CONTROL COLUMN
a.
Inspect for wear, damage, corrosion, attachment
and operation.
27
b.
Inspect control wheel adapter for cracks in the
weld area of adapter on forward side of the
control wheel.
27
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
c.
Inspect control wheel switches for condition and
security of attachment.
27
d.
Perform the CONTROL COLUMN BEARING
SUPPORT INSPECTION procedure.
27-10-05, 601
17. PEDESTAL
a.
b.
Inspect pedestal components and plumbing for
damage, attachment, chaffing and hoses for
hardness or cracks.
31
Perform the CONDITION CONTROL CATCH
GATE INSPECTION procedure.
76-17-03, 601
18. PRESSURIZATION CONTROLLER
a.
Inspect for security of attachment, plumbing and
wiring for damage and connection security.
21
b.
Inspect filter in controller assembly located within
the pedestal.
21
19. ACCESS DOORS - Inspect for fit and attachment.
20. HEATED WINDSHIELD - Inspect windshield antistatic
coating and tab bonding.
06-50-00, 001
56
21. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for corrosion.
b.
Inspect relief tube outlet area for corrosion.
22. ELECTRICAL LOAD DISTRIBUTION - Perform
inspections of the DUAL BUS FEEDER and FUEL
PANEL DIODES.
24-51-00, 601
23. VENTILATION BLOWER - Inspect for dirt, grease,
moisture and security of attachment. Rotate blower by
hand and ensure that it rotates freely. Check for noise
or evidence of worn bearings. Turn on the blower and
check for noise or vibration.
21
24. HEATING SYSTEM
a.
Check all ducts for damage and deterioration.
b.
Check bleed air ducts for damage, insulation and
adequate clearance of electrical wiring and
control cables.
CAUTION:
Prior to installing pilot's compartment floor
panels, visually inspect the entire length of
the elevator control cable in this area to
assure adequate clearance between the
cable and electrical wiring, bleed air ducts,
bleed air duct clamps, and structural
components to prevent chaffing and wear.
Copyright © Textron Aviation Inc.
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21
21
Page 6 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
25. EMERGENCY LANDING GEAR EXTENSION Inspect the emergency extension handle assembly and
linkage from the handle to the emergency extension
pump for proper installation, wear and security of
attachment.
32
26. ENVIRONMENTAL SYSTEM
a.
Inspect ducts for condition and security of
installation.
21
b.
Check ducts for evidence of thermal leaks and/or
degradation, such as discoloration of duct
insulator, adjacent structure or components.
21
Physically inspect ducts by touching ducts,
checking for thermal deterioration, deformation of
the ducts, and proper connection at the joints.
21
c.
F.
d.
Perform the BLEED AIR BYPASS VALVE
OPERATIONAL CHECK procedure.
21-41-07, 601
e.
Perform the FUNCTIONAL TEST OF THE DUCT
SENSE ELEMENT procedure.
21-61-00, 501
f.
Perform the FUNCTIONAL TEST OF THE CABIN
TEMPERATURE CONTROL SYSTEM
procedure.
21-61-00, 501
Cabin Section
ATA REFERENCE
1.
WINDOWS - Inspect exterior surface of windows for
scratches, cracks, chips and excessive crazing or
other damage.
56
2.
ROTATING or FLASHING BEACON - Inspect for
cracked or broken lenses.
33
3.
ACCESS DOORS - Inspect for fit and attachment.
06-50-00, 001
4.
OUTFLOW and SAFETY VALVES
a.
Drain outflow valve control line.
21
b.
Inspect plumbing and components for attachment.
21
c.
Clean and inspect safety valve screen. Perform
the SAFETY VALVE FILTER CLEANING
procedure.
12-20-21, 701
Clean and inspect poppet and seat of both
valves. Perform the appropriate OUTFLOW AND
SAFETY VALVE CLEANING procedure.
12-20-21, 701
d.
e.
5.
Perform functional test of outflow and safety
valves.
21
PRESSURIZATION DUCTS - Inspect for security of
attachment.
21
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MECH
INSP
Page 7 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
6.
FLAPPER VALVE - Check for proper operation and
excessive air noise.
21
7.
SEAT TRACKS - Inspect seat tracks for damage and
wear.
25
8.
CABIN SECTION AREA - Inspect skin, structure, seats
and attaching hardware for wear, damage and
corrosion. If damage or corrosion is found in a given
area, check the adjacent area.
9.
SEATS, SEAT BELTS and SHOULDER
HARNESSES
a.
b.
Inspect seat belt and shoulder harness
attachment post for deterioration or missing
components.
25-20-01, 601
Inspect shoulder harness attachment post for
cracked, worn, brittle or missing grommet (If
installed).
25-20-01, 601
10. OXYGEN SYSTEM
a.
Test all outlets and masks for oxygen flow.
35
b.
Inspect oxygen system installation for damage
and security of attachment.
35
11. TOILET (If Installed) - Inspect for spillage and leakage
below the toilet.
38
12. CABIN ENTRANCE DOOR
a.
Inspect the door seal for cuts, abrasions and
security of attachment.
52
b.
Inspect door seal solenoid valve and pressure
regulator valve for security and electrical
connection.
52
c.
Inspect the cabin door support cables for wear,
damage and security.
52
d.
Inspect door latching mechanism and cables for
damage, deterioration and security of attachment.
52
e.
Inspect upper latch hooks and retaining pins for
rigging, wear and damage. Replace pin at 10%
diameter wear. (Pin removal required).
52
53
f.
Inspect upper latch hooks for proper tension.
52
g.
Inspect side latch bolts (bayonets) and rollers for
rigging and freedom of movement.
52
h.
Inspect the CABIN DOOR unlocked annunciator
switch spring.
52
53
13. EMERGENCY EXIT
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Page 8 of 32
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
a.
Inspect latches for damage and check all moving
parts for proper operation.
b.
Check for proper latch adjustment and seal of
closed door.
52
14. CABIN DOORS and EMERGENCY EXITS
a.
b.
Inspect skin, structure and attaching hardware for
wear, damage and corrosion. If damage or
corrosion is found in a given area, check the
adjacent area.
AC43.13-1B/2B
Inspect corner areas of emergency exit (removed)
for cracks and abrasion in area of curvature
between seal and outer face of exit.
52
15. AVIONICS EQUIPMENT and RACKS (If Installed) Inspect avionics equipment and racks for security of
attachment.
16. BULKHEADS - Inspect for water traps.
17. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
18. LANDING GEAR HYDRAULIC LINES - Inspect for
leaks, damage and security of attachment.
19. FLAP MOTOR and DRIVES - Inspect for damage and
attachment.
27
20. AILERON QUADRANT REGULATOR (LJ-1306 and
After) - Inspect for security, attachment, operation and
travel.
27
21. BELLY DRAIN VALVES - Inspect for possible
obstructions.
22. CABIN WINDOW ATTACH FRAMES - Perform
inspection and check for looseness of window attach
frames.
56
23. PNEUMATIC PRESSURE REGULATOR, VACUUM
EJECTOR and DEICER DISTRIBUTION VALVE Inspect equipment and plumbing for security.
24. CONTROL CABLE SEALS - Inspect for damage,
security, cleanliness and lubrication.
Copyright © Textron Aviation Inc.
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27
Page 9 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
25. AUTOPILOT COMPONENTS - Inspect components for
security of attachment.
22
26. RELIEF TUBE (If installed)
a.
Inspect plumbing and storage box for corrosion.
b.
Inspect relief tube outlet area for corrosion.
27. ANTENNAS - Inspect all external antennas for leading
edge erosion and condition of base seals.
28. PORTABLE FIRE EXTINGUISHER - Inspect bottle for
signs of damage and security of attachment.
26-21-00, 001
CMM
29. ELECTRICAL WIRING and EQUIPMENT - Inspect all
exposed electrical wiring and equipment for chafing,
damage and security of attachment.
AC43.13-1B/2B
30. UPHOLSTERY PANELS - Inspect for security of
attachment.
31. LANDING POWER PACK and MOTOR
a.
Perform the GEAR-UP AND GEAR-DOWN
PORT FINGER SCREEN CLEANING procedure.
12
b.
Perform the LANDING GEAR BLEED AIR
OVERBOARD RELIEF ORIFICE procedure.
12
c.
Inspect all plumbing attach points for leaks and
security of attachment.
32
d.
Inspect the alternate extension hand pump suction
line filter/screen.
32
32. ENVIRONMENTAL SYSTEM
G.
a.
Inspect ducts for condition and security of
installation.
b.
Check ducts for evidence of thermal leaks and/or
degradation, such as discoloration of duct
insulator, adjacent structure or components.
c.
Physically inspect ducts by touching ducts,
checking for thermal deterioration, deformation of
the ducts, and proper connection at the joints.
Rear Fuselage and Empennage
ATA REFERENCE
1.
REAR FUSELAGE DRAINS - Clean and inspect.
2.
ELT BATTERY
3.
Inspect for leakage, corrosion or loose
connections.
25
b.
Determine remaining useful life.
25
Copyright © Textron Aviation Inc.
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INSP
53
a.
NAVIGATION LIGHTS and ROTATING (Flashing)
BEACONS - Inspect for broken or cracked lenses.
MECH
33
Page 10 of 32
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
4.
ACCESS DOORS - Inspect for fit and security of
attachment.
06-50-00, 001
5.
VENTRAL FIN DRAIN HOLES - Inspect the drain
holes in the bottom of the ventral fin for obstructions.
53-10-00, 601
6.
DEICER BOOTS - Inspect for deterioration, damage
and attachment.
30
7.
RUDDER TRIM TAB DRAIN HOLES - Inspect the
drain holes for obstructions.
8.
RUDDER BOOST SYSTEM - Replace filter.
9.
STATIC WICKS
27
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
10. EMPENNAGE and CONTROL SURFACES
a.
Check elevator trim tab free play.
27
b.
Check rudder trim tab free play.
27
c.
Inspect elevator and rudder hinge brackets and
their spar attach areas.
27
d.
Inspect skin, structure and attaching hardware for
wear, damage and corrosion. If damage or
corrosion is found in a given area check the
adjacent area.
53
11. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
12. AVIONICS and AUTOPILOT EQUIPMENT and
RACKS - Inspect for security, corrosion and signs of
water leakage.
13. VERTICAL STABILIZER - Inspect front and rear spars
of the vertical stabilizer for loose or missing rivets or
fasteners.
55
14. CONTROL CABLE SEALS - Inspect for deterioration,
security, cleanliness and lubrication.
27
15. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
Copyright © Textron Aviation Inc.
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27
20-04-00, 201
Page 11 of 32
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
b.
H.
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
16. FLIGHT CONTROL CABLE TENSION - Inspect and
record elevator, elevator tab, rudder and rudder tab
cable tension:
TEMPERATURE:____ °F
ELEVATOR CABLE TENSION: UP ____DOWN____
ELEVATOR TAB CABLE TENSION:________
RUDDER CABLE TENSION: LEFT _____RIGHT___
RUDDER TAB CABLE TENSION: _______
27
17. OXYGEN SYSTEM - Inspect plumbing for security of
attachment.
35
Left-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES - Determine
that the drain holes are open in the wing center section
and outboard wing upper attachment fittings.
SIRM
3.
4.
MECH
INSP
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
FUEL TANKS and VENTS
33
a.
Inspect the exterior of the wing for leaks.
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing or flexibility,
splits, cracks, or distortion.
28
Inspect exterior openings of vents for
obstructions.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
28
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit
and attachment.
30
7.
STATIC WICKS
c.
a.
Inspect for damage and security of attachment.
b.
Check for proper bonding to the airplane.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
06-50-00, 001
23
Page 12 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
8.
AILERON and TRIM TAB - Perform the CHECKING
AILERON TAB FREE PLAY procedure.
9.
LEFT-HAND OUTBOARD WING AREA - Inspect skin,
structure, and attaching hardware for wear, damage
and corrosion. If damage or corrosion is found in a
given area, check the adjacent area (Ref. King Air
Series Structural Inspection and Repair Manual, 5713-01, 201).
20
10. LEFT-HAND OUTBOARD FLAP - Inspect skin,
structure and attaching hardware for wear, damage
and corrosion. If damage or corrosion is found in a
given area, check the adjacent area.
27
11. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
12. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
13. FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron and aileron tab cable tension:
TEMPERATURE:____ °F
3/16" AILERON CABLE TENSION: LEFT______
AILERON TAB CABLE TENSION: ______
27
14. FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
27
b.
Inspect flap tracks for wear.
27
15. FUEL PLUMBING - Inspect for leaks, chafing or
damage and attachment.
16. HINGED ACCESS DOORS (Inside wing access
panels 13 and 14) - Inspect for cracks or damage to
hinge and fasteners.
I.
28
06-50-00, 001
Left-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
28
Page 13 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
2.
FUEL TANKS and VENTS
a.
Inspect the exterior of the center section for leaks.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for flexibility,
splits, cracks, or distortion.
28
c.
Inspect the exterior openings of the vents for
obstructions.
28
a.
While fuel cell area is open, inspect fuel cell for
condition, cleanliness and security. Inspect
internal plumbing for security of attachment and
general condition.
28
NACELLE FUEL CELL and PROBE - Inspect for
microbiological sludge buildup. If sludge is found,
inspect all fuel probes, tanks, fuel lines and replace the
fuel filter. Clean as required. If needed, use BIOBOR
JF or Kathon FP 1.5 additive.
28
4.
ACCESS DOORS (Inspection Panels) - Inspect for fit
and attachment.
06-50-00, 001
5.
FUEL PUMPS - Inspect the pumps for leaks and
security of attachment.
28
6.
LEFT-HAND WING CENTER SECTION AREA Inspect wing center section and inboard flap, skin
structure and attaching hardware for wear, damage
and corrosion. If damage is found in a given area,
check the adjacent area.
SIRM
3.
7.
8.
9.
FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
27
b.
Inspect flap tracks for wear.
27
LEADING EDGE and NACELLE FUEL PLUMBING Inspect fuel plumbing for leaks, damage and security of
attachment.
28
FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 14 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
10. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage and proper routing of wire bundles
and security of attachment.
AC43.13-1B/2B
11. BLEED AIR BYPASS VALVE - Check bleed air valve
at heat exchanger for operation of linkage to butterfly
valve and operation of actuator motor.
21
12. HYDRAULIC LANDING GEAR ACCUMULATOR,
FLUID RESERVOIR and ALL PLUMBING
J.
a.
Inspect for damage, security of attachment and
leaks.
12
32
b.
Clean and inspect hydraulic power pack fill
reservoir screen.
12
32
c.
Check for proper fluid level in the fluid reservoir.
12
Left-Hand Main Landing Gear Area
ATA REFERENCE
1.
Inspect wheels for wear, damage and corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and plumbing
for wear damage, leaks, corrosion and security of all
components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
LEFT-HAND MAIN LANDING GEAR STRUT - Check
strut for leaks and proper extension.
12
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
AC43.13-1B/2B
7.
INSP
WHEELS
a.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Check actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for cracks and loose or missing
rivets.
32
c.
Inspect actuators for leakage.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive wear.
CMM
b.
Inspect for security of attach fittings.
32
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 15 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
8.
K.
c.
Inspect downlock bolts for proper torque (fingertight and safety-wired).
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect wheel well and
gear door structure, all components and attaching
hardware for wear, damage and corrosion. If damage
or corrosion is found, check the adjacent area.
CMM
32
Left-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall
filter for evidence of foreign matter, corrosion or
microbiological growth in the fuel system. If any
microbiological growth is found, use BIOBOR JF or
Kathon FP 1.5 additive.
12
3.
a.
Inspect for damage and attachment (spinner
removal required).
61
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between the
brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct
adjustment, evidence of binding and security of
attachment.
76
Inspect mechanical feedback ring, stop rods and
springs for damage.
61
76
4.
HIGH PRESSURE FUEL PUMP FILTERS - Inspect
the engine-driven high-pressure fuel pump filters.
P&W
5.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
6.
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT Inspect for fretting and/or corrosion when replacing
outlet filter.
P&W
COWLING - Remove entire cowling and inspect skin,
structure and attaching hardware for wear, damage
and corrosion.
71
8.
INSP
PROPELLERS
e.
7.
MECH
OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
79
b.
Inspect drain plug for leakage, security and
safety wire.
79
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 16 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
9.
AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
10. FIRESEALS - Inspect for condition.
71
71
11. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage
and corrosion.
P&W
b.
Inspect the exhaust system and visible portions
of the power turbine for burning, distortion,
damage and cracks.
P&W
12. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for
binding, stiff operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and
safeties for corrosion, damage and attachment.
NOTE:
Special attention should be made to the
cambox.
c.
76
76
Inspect control cables for damage such as
crimps, cuts, abrasions or tight bends. If exterior
covering is ruptured, perform leak test.
12
13. CONTROL CABLE BOOTS - Inspect the control cable
boots for excessive compression, twist, wear or aging
which could cause binding.
76
14. STARTER-GENERATOR - Inspect one set of brushes
for indications of excessive wear or damage
(determine wear by observing diagonal groove on
brush).
24-30-05, 601
15. INDUCTION SYSTEM and COMPRESSOR INLET Inspect the air inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet
screen and inspect the compressor inlet area, struts,
first stage blades and vanes for dirt deposits,
corrosion, erosion, cracks and damage by foreign
objects.
P&W
16. MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal
particles and damage. Perform the MAGNETIC
CHIP DETECTOR INSPECTION procedure.
12
79-30-05, 401
b.
Check light in annunciator panel for proper
operation. Perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST procedure.
12-10-03, 301
17. ENGINE
a.
Inspect fuel nozzles per engine manufacturer's
manual.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
P&W
Page 17 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
b.
Inspect engine in accordance with the
instructions found in the engine manufacturer's
manual.
P&W
18. ENGINE TRUSS MOUNT ASSEMBLY
a.
Inspect for cracks, dents, chafing and corrosion.
Special attention should be made to areas
around clamps.
71
Inspect vibration isolators (mounts) for
deterioration, damage and attachment.
71
19. ENGINE FIRE DETECTION SYSTEM - Check all fire
detectors for sensitivity and continuity.
26
b.
20. ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26
21. AUTOFEATHER and AUTOIGNITION PRESSURE
SWITCHES - Inspect security of attachment, leakage
and electrical connection for security.
61
74
22. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of
electrical connectors and wiring.
61
23. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical
connectors and wiring.
61
24. IGNITION EXCITER
a.
Inspect exciter and electrical harness for damage
and security of attachment.
P&W
b.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
25. SPARK IGNITER PLUGS - Inspect the igniter plugs as
described in the engine maintenance manual.
P&W
26. FUEL PURGE SYSTEM
a.
Remove fuel purge system air tank and inspect.
Clean as required.
71
b.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
c.
Remove the fuel purge system check valves.
Inspect, pressure flush and perform internal
leakage test. Replace as required.
71
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 18 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
d.
Perform the fuel purge system flow divider/purge
valve leakage test. Replace as required.
71
27. INERTIAL ENGINE ANTI-ICER
L.
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
Check main and standby actuator motors and
limit switches for operation and correct
adjustment.
12
30
28. ENVIRONMENTAL BLEED AIR FLOW CONTROL
UNIT - Inspect valve and associated equipment,
electrical wiring and ducts for damage, security of
connections and attachment.
21
Right-Hand Outboard Wing
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
28
2.
WING ATTACH FITTING DRAIN HOLES - Determine
that the drain holes are open in the wing center section
and outboard wing upper attachment fittings.
SIRM
3.
4.
INSP
LIGHTS
a.
Inspect the navigation and recognition (if
installed) lights for broken or cracked lenses.
33
b.
Inspect the strobe light for broken or cracked
lenses, if installed.
33
FUEL TANKS and VENTS
a.
Inspect exterior openings of vents for
obstructions.
28
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing or flexibility,
splits, cracks, or distortion.
28
Inspect the exterior of the wing for leaks.
28
5.
DEICER BOOTS - Inspect exterior surface for
deterioration, damage and attachment.
30
6.
ACCESS DOORS (Inspection Panels) - Inspect for fit
and attachment.
7.
STATIC WICKS
c.
8.
MECH
06-50-00, 001
a.
Inspect for damage and security of attachment.
23
b.
Check for proper bonding to the airplane.
20
AILERON and TRIM TAB - Perform the CHECKING
AILERON TAB FREE PLAY procedure.
27
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 19 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
9.
RIGHT-HAND OUTBOARD WING AREA - Inspect
skin, structure, and attaching hardware for wear,
damage and corrosion. If damage or corrosion is
found in a given area, check the adjacent area (Ref.
King Air Series Structural Inspection and Repair
Manual, 57-13-01, 201).
10. RIGHT-HAND OUTBOARD FLAP - Inspect skin,
structure and attaching hardware for wear, damage
and corrosion. If damage or corrosion is found in a
given area, check the adjacent area.
27
11. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage, proper routing of wire bundles and
security of attachment.
AC43.13-1B/2B
12. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
b.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley brackets,
etc.) for bulges, splits, bends or cracks which are
conditions for replacement.
27
20-04-00, 201
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
13. FLIGHT CONTROL CABLE TENSION - Inspect and
record aileron and aileron tab cable tension:
TEMPERATURE:___ °F
3/16" AILERON CABLE TENSION: RIGHT____
AILERON TAB CABLE TENSION: ____
27
14. FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
27
b.
Inspect flap tracks for wear.
27
15. FUEL PLUMBING - Inspect for leaks, chafing or
damage and attachment.
16. HINGED ACCESS DOORS (Inside wing access
panels 13 and 14) - Inspect for cracks or damage to
hinge and fasteners.
28
06-50-00, 001
M. Right-Hand Wing Center Section
ATA REFERENCE
1.
FUEL PROBES - Inspect for leaks at points of
attachment.
2.
FUEL TANKS and VENTS
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
MECH
INSP
28
Page 20 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
a.
Inspect the exterior of the center section for
leaks.
b.
Inspect fuel cap for damage and attachment.
Inspect the visible fuel cap packing for flexibility,
splits, cracks, or distortion.
28
Inspect the exterior openings of the vents for
obstructions.
28
CENTER SECTION - Inspect Aux Fuel Cell inboard
probe for security, leaks, corrosion and general
condition. Removal of the inboard probe cover
required. Defuel the effected tank as required to
remove the inboard probe.
28
c.
3.
a.
28
While fuel cell area is open, inspect fuel cell for
condition, cleanliness and security. Inspect
internal plumbing for security of attachment and
general condition.
28
NACELLE FUEL CELL and PROBE - Inspect for
microbiological sludge buildup. If sludge is found,
inspect all fuel probes, tanks, fuel lines and replace
the fuel filter. Clean as required. If needed, use
BIOBOR JF or Kathon FP 1.5 additive.
28
12
5.
ACCESS DOORS (Inspection Panels) - Inspect for fit
and attachment.
06-50-00, 001
6.
BATTERY
4.
a.
Service battery as required.
12
b.
Remove battery and inspect the battery box,
cables and vent tubes for deterioration or
obstructions (LJ-1063 thru LJ-1533).
24
Remove battery and inspect the battery box and
cables for deterioration (LJ-1534 and After).
24
c.
7.
FUEL PUMPS - Inspect the pumps for leaks and
security of attachment.
28
8.
RIGHT-HAND WING CENTER SECTION AREA Inspect wing center section and inboard flap, skin
structure and attaching hardware for wear, damage
and corrosion. If damage is found in a given area,
check the adjacent area.
SIRM
9.
FLAPS and ACTUATORS
a.
Inspect flap 90° drive, cable and actuator for
attachment.
27
b.
Inspect flap tracks for wear.
27
10. LEADING EDGE and NACELLE FUEL PLUMBING Inspect fuel plumbing for leaks, damage and security
of attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
28
Page 21 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
11. FLIGHT CONTROL COMPONENTS, CABLES and
PULLEYS
a.
Inspect control system components (pushrods,
turnbuckles, end fittings, castings, pulley
brackets, etc.) for bulges, splits, bends or cracks
which are conditions for replacement.
27
20
Inspect control system cables, pulleys and
associated equipment for wear, cracks, breaks,
attachment, alignment, clearance and proper
operation. Replace cables that have more than
three broken wires in any given three-foot cable
length or have evidence of corrosion.
27
20-04-00, 201
12. ELECTRICAL WIRING and EQUIPMENT - Inspect for
chafing, damage and proper routing of wire bundles
and security of attachment.
AC43.13-1B/2B
b.
13. BLEED AIR BYPASS VALVE - Check bleed air
valve at heat exchanger for operation of linkage to
butterfly valve and operation of actuator motor.
N.
21
Right-Hand Main Landing Gear Area
ATA REFERENCE
1.
Inspect wheels for wear, damage and corrosion.
CMM
b.
Inspect wheel bearings and races for wear,
pitting, cracks, discoloration, rust or other
indications of damage.
CMM
2.
BRAKES - Inspect brake discs, linings and plumbing
for wear damage, leaks, corrosion and security of all
components.
32-40-05, 601
CMM
3.
TIRES - Inspect tires for wear, deterioration and
correct inflation.
12-20-15, 301
CMM
4.
RIGHT-HAND MAIN LANDING GEAR STRUT - Check
strut for leaks and proper extension.
12-20-33, 301
5.
ELECTRICAL WIRING and EQUIPMENT - Inspect
exposed wiring and equipment for chafing, damage
and proper routing and security of attachment.
AC43.13-1B/2B
7.
INSP
WHEELS
a.
6.
MECH
MAIN LANDING GEAR ACTUATOR
a.
Inspect actuator support brackets for visible
damage and wear.
32
b.
Inspect brackets for loose or missing rivets.
32
c.
Inspect actuators for leakage.
32
DRAG BRACE
a.
Inspect elliptical hole for excessive wear.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
CMM
Page 22 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
8.
O.
b.
Inspect for security of attach fittings.
32
c.
Inspect downlock bolts for proper torque (fingertight and safety-wired).
CMM
d.
Inspect mount bolts for wear.
MAIN LANDING GEAR AREA - Inspect wheel well
and gear door structure, all components and attaching
hardware for wear, damage and corrosion. If damage
or corrosion is found, check the adjacent area.
32
Right-Hand Engine
ATA REFERENCE
1.
PROPELLER DEICER - Inspect propeller deice
system (spinner removal required).
30
CMM
2.
FUEL FILTERS and SCREENS - Inspect the firewall
filter for evidence of foreign matter, corrosion or
microbiological growth in the fuel system. If any
microbiological growth is found, use BIOBOR JF or
Kathon FP 1.5 additive.
12
3.
a.
Inspect for damage and attachment (spinner
removal required).
61
b.
Inspect the carbon block pin for freedom of
movement.
61
76
c.
Check for no metal-to-metal contact between the
brass ring and the reversing lever.
61
76
d.
Inspect the reversing linkage for correct
adjustment, evidence of binding and security of
attachment.
76
Inspect mechanical feedback ring, stop rods and
springs for damage.
61
76
4.
HIGH PRESSURE FUEL PUMP FILTERS - Inspect
the engine-driven high-pressure fuel pump filters.
P&W
5.
ENGINE OIL FILTER - Inspect for metal particles.
P&W
6.
ENGINE-DRIVEN FUEL PUMP COUPLING SHAFT Inspect for fretting and/or corrosion when replacing
outlet filter.
P&W
COWLING - Remove entire cowling and inspect skin,
structure and attaching hardware for wear, damage
and corrosion.
71
8.
INSP
PROPELLERS
e.
7.
MECH
OIL COOLER
a.
Inspect oil cooler and plumbing for leakage,
damage and security of attachment.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
79
Page 23 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
b.
9.
Inspect drain plug for leakage, security and safety
wire.
79
AFT COWLING ACCESS DOOR LATCHES - Check
adjustment of latches.
71
10. FIRESEALS - Inspect for condition.
71
11. ENGINE EXHAUST SYSTEM
a.
Inspect attaching hardware for wear, damage and
corrosion.
78
b.
Inspect the exhaust system and visible portions of
the power turbine for burning, distortion, damage
and cracks.
P&W
12. ENGINE and PROPELLER CONTROLS
a.
Check controls and associated equipment for
binding, stiff operation, full travel and friction lock.
b.
Inspect controls, bolts, nuts, cotter pins and
safeties for corrosion, damage and attachment.
NOTE:
Special attention should be made to the
cambox.
c.
Inspect control cables for damage such as
crimps, cuts, abrasions or tight bends. If exterior
covering is ruptured, perform leak test.
76
76
76
13. CONTROL CABLE BOOTS - Inspect the control cable
boots for excessive compression, twist, wear or aging
which could cause binding.
14. STARTER-GENERATOR - Inspect one set of brushes
for indications of excessive wear or damage
(determine wear by observing diagonal groove on
brush).
24-30-05, 601
15. INDUCTION SYSTEM and COMPRESSOR INLET Inspect the engine inlet screen and air inlet duct for
obstruction and damage. Remove the engine inlet
screen and inspect the compressor inlet area, struts,
first stage blades and vanes for dirt deposits,
corrosion, erosion, cracks and damage by foreign
objects.
P&W
16. MAGNETIC CHIP DETECTOR (If Installed)
a.
Remove and visually inspect plug for metal
particles and damage. Perform the MAGNETIC
CHIP DETECTOR INSPECTION procedure.
12
79-30-05, 401
b.
Check light in annunciator panel for proper
operation. Perform the MAGNETIC CHIP
DETECTOR ANNUNCIATOR TEST procedure.
12-10-03, 301
17. ENGINE
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
Page 24 of 32
Print Date: Thu Jan 11 11:04:11 CST 2024
King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
a.
Inspect fuel nozzles per engine manufacturer's
manual.
P&W
b.
Inspect engine in accordance with the instructions
found in the engine manufacturer's manual.
P&W
18. ENGINE TRUSS MOUNT ASSEMBLY
a.
Inspect for cracks, dents, chafing and corrosion.
Special attention should be made to areas
around clamps.
71
Inspect vibration isolators (mounts) for
deterioration, damage and attachment.
71
19. ENGINE FIRE DETECTION SYSTEM - Check all fire
detectors for sensitivity and continuity.
26
b.
20. ENGINE FIRE EXTINGUISHER (If Installed)
a.
Inspect plumbing for security of attachment.
26
b.
Check fire bottle pressure gage.
26
c.
Check for presence of activation voltage to the
cartridge/squibs. Perform the EXTINGUISHER
ACTIVATION CHECK procedure.
26
21. AUTOFEATHER and AUTOIGNITION PRESSURE
SWITCHES - Inspect security of attachment, leakage
and electrical connection for security.
61
74
22. PRIMARY PROPELLER GOVERNOR - Inspect for
security of attachment, leakage and security of
electrical connectors and wiring.
61
23. OVERSPEED GOVERNOR - Inspect for security of
attachment, leakage and security of electrical
connectors and wiring.
61
24. IGNITION EXCITER
a.
Inspect exciter and electrical harness for damage
and security of attachment.
P&W
b.
Inspect that supply cable and ignition cable
connectors are installed and safety wired.
P&W
25. SPARK IGNITER PLUGS - Inspect the igniter plugs as
described in the engine maintenance manual.
P&W
26. FUEL PURGE SYSTEM
a.
Remove fuel purge system air tank and inspect.
Clean as required.
71
b.
Remove fuel purge tank filter and inspect for
corrosion. Clean as required.
71
c.
Remove the fuel purge system check valves.
Inspect, pressure flush and perform internal
leakage test. Replace as required.
71
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
d.
Perform the fuel purge system flow divider/purge
valve leakage test. Replace as required.
71
27. INERTIAL ENGINE ANTI-ICER
P.
a.
Check vane(s) for freedom of movement and
correct travel. Lubrication of linkage and vane
hinges may be necessary.
12
30
b.
Check main and standby actuator motors and
limit switches for operation and correct
adjustment.
12
30
28. ENVIRONMENTAL BLEED AIR FLOW CONTROL
UNIT - Inspect valve and associated equipment,
electrical wiring and ducts for damage, security of
connections and attachment.
21
Landing Gear Retraction
ATA REFERENCE
MECH
INSP
NOTE:
Since battery voltage is not sufficient to properly cycle the
landing gear, use only an external power source capable
of delivering and maintaining 28.25 ± 0.25 volts throughout
the extension and retraction cycles when performing the
landing gear retraction inspection.
NOTE:
The hydraulic landing gear system pump may cavitate and
not operate properly during ground use of the hydraulic
power pack for retraction and/or extension of the landing
gear. To prevent this, an exterior supply of dry air at 18 to
20 psi must be applied to the power pack reservoir to
prevent cavitation. If an external air supply is not available,
use an external hydraulic pressure source. (Ref.
OPERATING THE LANDING GEAR USING THE POWER
PACK, Chapter 32).
1.
2.
3.
4.
RETRACT MECHANISM - Check retraction system
for proper operation of all components through at
least two complete cycles.
32
DOORS and LINKAGE
a.
Check door for damage, operation and fit.
32
b.
Check door linkage for wear, damage and
rigging.
32
DOWNLOCK INDICATOR SWITCHES
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
UPLOCK INDICATOR SWITCHES
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
a.
Check for security and proper operation of
switches.
32
b.
Check wiring for damage and security of
connection.
32
5.
WARNING HORN - Check for proper operation.
32
6.
MAIN GEAR DOWNLOCKS - Check locking
mechanism for positive engagement in extended
position.
32
7.
SAFETY SWITCH - Check for security and proper
operation.
32
8.
ACTUATORS - Check for noise, binding and proper
rigging.
32
9.
EMERGENCY EXTENSION - Check system for
freedom of operation and positive engagement of
downlocks.
CAUTION:
Do not continue operation after receiving a geardown indication on all gears. Further movement
of the handle could damage the drive
mechanism and prevent subsequent electrical
gear retraction. The landing gear cannot be
retracted manually.
10. PLACARDS - Check that all placards are in place
and are legible.
Q.
32
11-20-00, 201
POH
Operational Inspection
ATA REFERENCE
MECH
INSP
NOTE:
The following Operational Inspection procedures are to be
applied during start and run of the engine. Refer to the
King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual for the engine start and
run procedures.
1.
FIREWALL SHUTOFF VALVES - Check for proper
operation.
2.
CROSSFEED VALVE - Check for proper operation.
3.
BOOST PUMPS - Check for proper operation.
4.
STARTER-GENERATOR
5.
a.
Check starter for proper operation.
b.
Check generator for proper output.
IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel light illumination.
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
6.
ENGINE OIL - Check for proper pressure and
temperature limits.
7.
FUEL QUANTITY GAGES - Check for proper
operation.
8.
INTERSTAGE TURBINE TEMPERATURE - Check
for correct limits on engine start.
9.
VACUUM SYSTEM - Check for correct limits.
10. PNEUMATIC PRESSURE GAGE - Check for correct
pressure.
11. GYRO INSTRUMENTS (LJ-1063 thru LJ-1846, LJ1848 thru LJ-1852) - Check for erratic or noisy
operation.
12. PROPELLERS - Perform low pitch torque check.
76
13. AUTOFEATHERING CHECK (If Installed) - Refer to
AUTOFEATHER OPERATIONAL CHECK.
61-23-00, 601
14. PROPELLER SYNCHROPHASER - Refer to
FUNCTIONAL TEST and confirm proper
synchronization.
61
15. PROPELLER GOVERNOR - Check governor
operation (including feathering and reversing).
16. IDLE RPM - Check for correct rpm (both high and low
rpm).
17. AC INVERTERS (LJ-1063 thru LJ-1846, LJ-1848 thru
LJ-1852) - Check for proper operation.
18. RUDDER BOOST - Check for proper operation.
27
19. AUTO-IGNITION
a.
Check for proper operation.
b.
Check for annunciator panel illumination.
20. PROPELLER DEICER - Check for proper operation
and cycling. Refer to Chapter 30 of the King Air
Series Component Maintenance Manual.
CMM
21. SURFACE DEICE SYSTEM - Check for proper
operation and cycling.
22. ELECTRICAL SYSTEM - Perform functional checks.
24
23. ENVIRONMENTAL SYSTEM - Check for proper
operation in:
a.
Manual heat mode.
b.
Manual cool mode.
c.
Automatic mode.
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
24. AUTOPILOT - Check for proper operation as outlined
by the applicable King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight Manual
Supplement.
25. STALL WARNING - Check for proper operation.
26. ENGINE FIRE DETECTORS (If Installed) - Perform
system test according to instructions found in the King
Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual.
27. ENGINE FIRE EXTINGUISHERS (If Installed) Perform system test according to instructions found in
the King Air 90 Pilot's Operating Handbook and FAA
Approved Airplane Flight Manual.
28. PRESSURIZATION SYSTEM - Check for proper
operation.
NOTE:
Refer to the King Air 90 Pilot's Operating
Handbook and FAA Approved Airplane Flight
Manual and perform system test.
29. CONDITION LEVER - Check for clean shutdown
atIDLE-CUT-OFF.
30. PITOT TUBE - Check for proper heating at the unit
and for obstructions.
31. LANDING and TAXI LIGHTS - Check for proper
operation.
32. OUTBOARD WING LIGHTS (Right and Left) - Check
proper operation of all navigation and strobe (if
installed) lights.
33. COCKPIT LIGHTS - Check for proper operation.
34. EFIS COOLING BLOWERS (If installed) - Check for
proper operation.
35. ELECTRIC ELEVATOR TRIM - Check for proper
operation.
36. ENGINE and PROPELLER CONTROLS - Check for
freedom of movement, full travel and friction-lock
operation.
37. STATIC SYSTEM - Inspect alternate air valve for
operation.
34-10-03, 601
38. WINDSHIELD - Perform heated operational check.
39. THRESHOLD LIGHT - Check for proper operation.
40. CABIN and COMPARTMENT LIGHTS - Check for
proper operation.
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
41. PILOT'S and COPILOT'S SEATS and SEAT BELTS
- Check seat adjustment mechanism, seat belt and
shoulder harness inertia reel for operation.
42. CABIN SEATS and SEAT BELTS - Check seat
adjustment mechanism, seat belt and shoulder
harness inertia reel for operation.
43. CABIN ENTRANCE DOOR
a.
Check that folding steps do not fold too soon
and that they fold properly without interference.
b.
Check CABIN DOOR annunciator for proper
operation.
c.
Inspect cabin door damper for leakage and
proper operation.
44. EMERGENCY EXIT
a.
Check emergency release handles and latch
mechanism for proper operation.
b.
Check that latches open and close freely.
45. EMPENNAGE CONTROL SURFACES
a.
Check for freedom of movement.
b.
Check optional trim actuators and motors for
smoothness of operation.
46. REAR FUSELAGE and EMPENNAGE LIGHTS Check for proper operation.
47. AILERON (LH and RH) - Check for freedom of
movement.
48. AILERON TRIM TAB - Check trim tab actuator for
smoothness of operation and attachment.
49. FUEL TANK HEATED VENTS (LH and RH) - Check
the operation of the heated vents. They should be
warm to the touch.
50. STALL WARNING HEAT - Check for proper
operation.
51. FLAPS and ACTUATORS (Inboard, Outboard, LH
and RH) - Check flaps for noisy or erratic operation.
52. WING ICING LIGHTS - Check for proper operation.
53. EXTERNAL POWER RELAY - Check for proper
operation.
54. AVIONICS COOLING BLOWER - Check for proper
operation.
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34
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
R.
55. ELEVATOR TRIM TAB ACTUATOR BUSHINGS Check for smoothness of operation. Make sure
movement is between inner and outer bushings.
27
56. PILOT DISPLAY SWITCH (LJ-1847, LJ-1853 and
After) - Perform the Engine Indication Reversion
Inspection procedure.
77
57. AUTOPILOT - DCU AURAL WARNING (LJ-1847, LJ1853 and After) - Perform the Autopilot Data
Concentrator Unit (DCU) Aural Warning Inspection
procedure.
22
58. STALL WARNING - Autopilot Disconnect (LJ-1847,
LJ-1853 and After) - Perform the Stall Warning
Autopilot Disconnect Inspection procedure.
22
Post Inspection Items
ATA REFERENCE
1.
AIRPLANE CLEANED and SERVICED as required.
12
2.
LUBRICATE as NECESSARY.
12
3.
ENGINES INSPECTED after GROUND RUN-UP or
FLIGHT TEST - Check for oil leaks, security and
attachment of all components.
4.
AIRWORTHINESS DIRECTIVES and SERVICE
BULLETINS - Must be reviewed and complied with as
required.
5.
ADDITIONAL INSPECTION REQUIREMENTS
a.
Make sure Special Inspection requirements are
complied with at the appropriate intervals.
05-25-05, 601
b.
Perform Continuous Corrosion Control
Inspection if required by the environmental
conditions encountered.
05-29-00, 601
6.
IN-FLIGHT WORKSHEET - All discrepancies noted
by the pilot must be checked and corrected as
required.
7.
EMERGENCY LOCATOR TRANSMITTER - Check
for proper operation and make sure ELT is ARMED
before returning airplane to service.
25
8.
OXYGEN SYSTEM PRESSURE - Check for proper
pressure.
12
9.
EMERGENCY and SURVIVAL EQUIPMENT - (If
Installed) Make sure all necessary emergency and
survival equipment are installed in the airplane and
serviceable.
10. PLACARDS - Determine that all required placards
are in place and legible.
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MECH
INSP
11-20-00, 201
POH
Page 31 of 32
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King Air 90 Series Maintenance Manual (Rev D1)
05-26-02 (Rev D0)
11. LOGBOOK ENTRY - Make sure that log books are
filled out properly.
2.
Inspection Completed
I certify that the Complete Inspection was performed in accordance with the King Air 90 Inspection Program and that the airplane is
approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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King Air 90 Series Maintenance Manual (Rev D1)
05-29-00 (Rev D0)
1.
CONTINUOUS CORROSION CONTROL INSPECTION - INSPECTION/CHECK
Continuous Corrosion Control Inspection
A.
B.
Purpose and Use
(1) This checklist is an OPTIONAL guideline for corrosion control inspections to be used during a scheduled inspection. Use
of this inspection is dependent upon the operational environment. It is recommended that accessible areas applicable to
this inspection be inspected during an Inspection Program that is in progress.
(2) The time periods for inspections stated in this inspection are set up in order that on-going inspections and corrections to
discrepancies can be made with minimal downtime. Internal portions of the wings, fuselage and empennage are to be
inspected and treated with applicable preventatives at the appropriate inspection.
(a) Perform the corrosion inspection if required by the environmental conditions encountered.
(b) Action must be taken and corrosion discrepancies corrected prior to the next inspection.
(c) The corrosion areas that need to be treated or painted should be noted.
(d) The airplane landing gear and exposed areas must be lubricated in accordance with applicable Maintenance
Manual instructions after each aircraft washing.
Airplane S/N : ________________________________
Inspection Date ______________________________
Airplane No. ________________________________
Airplane T.I. _________________________________
Wings
MECH
LH
INSP
RH
NOTE:
It is the intention of this inspection that the
access/inspection panels only be removed if evidence of
corrosion is found.
1.
SKIN - Inspect skin for corrosion and paint for
blistering and scratches. Check for loose or missing
rivets. If corrosion is found, inspect adjacent
structure.
2.
FLAP AND AILERON COVE AREA - Inspect for
corrosion and paint for blistering and scratches.
Areas should be clean.
3.
ACCESS/INSPECTION PANELS - Check for
corrosion on panels and attaching hardware. If
corrosion is found, remove the panel and check the
adjacent structure. Replace all corroded hardware.
4.
AILERON AND TAB - Inspect skin for corrosion and
paint for blistering and scratches.
5.
OUTBOARD FLAPS - Inspect skin for corrosion and
paint for blistering and scratches.
6.
FLAP TRACKS - Inspect for corrosion.
7.
FLAP ACTUATOR- Inspect attaching hardware and
rollers for corrosion.
8.
WING TIP - Inspect skin and attaching hardware for
corrosion and paint for blistering and scratches.
9.
FUEL VENTS AND DRAINS - Inspect for corrosion.
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King Air 90 Series Maintenance Manual (Rev D1)
05-29-00 (Rev D0)
10. FUEL FILLER CAPS - Inspect caps and
surrounding area for corrosion and paint for
blistering and scratches.
11. DEICER BOOTS - Inspect boots for secure bond
and paint for blistering and scratches adjacent to
boots.
C.
Wing Center Section
MECH
LH
D.
1.
SKIN - Inspect for corrosion and paint for blistering
and scratches. Check for loose or missing rivets. If
corrosion is found, check adjacent structure.
2.
ACCESS/INSPECTION DOORS - Check for
corrosion and paint for blistering and scratches.
Check for loose or missing rivets. If corrosion is
found, check adjacent structure. Replace all
corroded hardware.
3.
INBOARD FLAPS - Inspect skin for corrosion and
paint for blistering and scratches.
4.
FLAP TRACKS - Inspect for corrosion.
5.
FLAP ACTUATOR - Inspect attaching hardware and
rollers for corrosion.
INSP
RH
Main Fuselage
MECH
1.
SKIN - Inspect for corrosion and paint for blistering
and scratches. Check for loose or missing rivets. If
corrosion is found, check adjacent structure.
2.
ACCESS/INSPECTION DOORS - Check for
corrosion on panels and attaching hardware. If
corrosion is found, remove panel and check
adjacent structure. Replace all corroded hardware.
3.
ANTENNAS - Inspect antenna bases for proper
sealing. Inspect antenna leading edges for severe
corrosion.
4.
DRAIN HOLES - Inspect for corrosion.
5.
STATIC PORTS - Inspect for corrosion and
obstructions.
6.
RELIEF TUBE - Inspect outlet area for corrosion.
7.
AVIONICS - Inspect components and hold-down
racks for corrosion.
8.
FLIGHT CONTROL CABLES - Inspect for chafing,
security, corrosion, and lubrication.
9.
BULKHEADS - Inspect for water traps.
Copyright © Textron Aviation Inc.
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INSP
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King Air 90 Series Maintenance Manual (Rev D1)
05-29-00 (Rev D0)
E.
Empennage
MECH
F.
1.
SKIN - Inspect empennage and flight control
surfaces skins for corrosion and paint for blistering
and scratches. Check for loose or missing rivets. If
corrosion is found, inspect adjacent structure.
2.
DEICER BOOTS - Inspect boots for cracks and
bond and paint for blistering and scratches
adjacent to boots.
3.
ELEVATOR BRACKETS - Inspect brackets and
attaching hardware for corrosion. Replace if
corroded.
4.
ELEVATOR TRIM TAB - Inspect trim tab and
attaching hardware for corrosion.
5.
DRAIN HOLES - Inspect for corrosion.
6.
RUDDER BRACKETS - Inspect brackets and
attaching hardware for corrosion.
7.
RUDDER TRIM TAB - Inspect trim tab and
attaching hardware for corrosion.
8.
FAIRINGS - Inspect fairings for condition and paint
for blistering and scratches. Inspect attaching
hardware for corrosion.
9.
ANTENNAS -Inspect antenna bases for water tight
seal. Inspect antenna leading edges for severe
corrosion. Inspect attaching hardware for
corrosion.
INSP
Cowling and Truss
MECH
LH
INSP
RH
NOTE:
Panels or cowlings need not be removed unless
corrosion is discovered and adjacent structure must be
inspected.
1.
COWLING SKIN - Inspect for corrosion and paint for
blistering and scratches. If corrosion is found, check
adjacent structure. Check for loose or missing rivets.
2.
AIR INLET - Inspect inlet and surrounding area for
corrosion and paint for blistering and scratches.
3.
DRAIN HOLES - Check for obstruction.
4.
LOWER COWLING - Inspect for sediment and water
traps.
5.
COWLING ATTACHING HARDWARE - Inspect for
corrosion.
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King Air 90 Series Maintenance Manual (Rev D1)
05-29-00 (Rev D0)
G.
6.
TRUSS TUBING - Inspect for corrosion and paint for
blistering and scratches.
7.
CLAMPS ATTACHED TO TRUSS - Inspect truss
area around clamps for corrosion and chaffing.
Power Plant
MECH
LH
1.
EXHAUST STACKS - Inspect stacks and attaching
hardware for corrosion. Inspect stacks for cracks.
2.
ENGINE CONTROLS - Inspect controls, bolts, nuts,
cotter pins and safeties for corrosion and
lubrication.
INSP
RH
NOTE:
Special attention should be made to the
cambox.
H.
Propellers
MECH
LH
1.
I.
J.
INSP
RH
BLADES - Inspect for corrosion; dress if necessary.
Inspect paint for blistering and scratches.
Pilot's Compartment
1.
INSTRUMENT PANEL - Inspect paint for blistering
and scratches and attaching hardware for corrosion
and cracks.
2.
CONTROL COLUMN - Inspect for corrosion.
3.
UPHOLSTERY PANELS - Inspect for tears and
attaching hardware for corrosion. Clean as
necessary.
4.
SEATS - Inspect frames for corrosion and paint for
blistering and scratches.
5.
SEAT TRACKS- Inspect tracks and attaching
hardware for corrosion.
MECH
INSP
MECH
INSP
Cabin Compartment
1.
UPHOLSTERY PANELS - Inspect for tears and
attaching hardware for corrosion. Clean as
necessary.
2.
SEATS - Inspect frames for corrosion and paint for
blistering and scratches.
3.
SEAT TRACKS - Inspect tracks and attaching
hardware for corrosion.
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King Air 90 Series Maintenance Manual (Rev D1)
05-29-00 (Rev D0)
4.
K.
TOILET (If installed) - Inspect for proper service and
spillage or leakage.
Main Landing Gear Area
MECH
LH
L.
1.
WHEEL WELL AREA - Inspect skin for corrosion
and paint for blistering and scratches. Check for
loose or missing rivets. If corrosion is found check
adjacent structure.
2.
LANDING GEAR DOORS - Inspect for corrosion
and paint for blistering or scratches. Inspect hinges
for loose or missing rivets.
3.
DRAG LEG ASSEMBLY- Inspect for corrosion and
paint for blistering or scratches. Inspect attaching
bolts for corrosion and lubrication. If corrosion is
found, remove and inspect the bolts.
4.
STRUT AND BRACE ASSEMBLY - Inspect
components for corrosion and paint for blistering
and scratches. Inspect strut for leakage.
5.
WHEEL ASSEMBLIES - Inspect for corrosion and
paint for blistering and scratches.
6.
BRAKE ASSEMBLIES - Inspect for corrosion and
leakage.
7.
WIRING AND PLUMBING - Inspect for corrosion,
chafing or bare spots.
INSP
RH
Nose Landing Gear Area
MECH
1.
WHEEL WELL AREA - Inspect skin for corrosion
and paint for blistering and scratches. Check for
loose or missing rivets. If corrosion is found, check
adjacent structure.
2.
LANDING GEAR DOORS - Inspect for corrosion
and paint for blistering or scratches. Inspect hinges
for loose or missing rivets.
3.
DRAG LEG ASSEMBLY - Inspect for corrosion and
paint for blistering or scratches. Inspect attaching
bolts for corrosion and lubrication. If corrosion is
found, remove and inspect the bolts.
4.
STRUT AND BRACE ASSEMBLY - Inspect
components for corrosion and paint for blistering
and scratches. Inspect strut for leakage.
5.
WHEEL ASSEMBLY - Inspect for corrosion and
paint for blistering and scratches.
Copyright © Textron Aviation Inc.
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INSP
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King Air 90 Series Maintenance Manual (Rev D1)
05-29-00 (Rev D0)
6.
WIRING AND PLUMBING - Inspect for corrosion,
chafing or bare spots.
M. Nose Avionics Compartment
N.
2.
1.
DOORS - Inspect skin for corrosion and paint for
blistering and scratches.
2.
DOOR SEALS - Inspect seals for condition and
sealing.
3.
HYDRAULIC BRAKE SYSTEM - Inspect fluid
reservoir and plumbing for corrosion and leakage.
4.
AVIONICS BAY - Inspect area for corrosion and
paint for blistering and scratches. Inspect fasteners
for corrosion. Replace if necessary. Inspect area for
water traps. Clean and inspect the shelves.
5.
MOUNTING RACKS - Inspect rack and associated
hardware for corrosion and attachment.
6.
AVIONICS - Inspect for corrosion and security of
attachment. Clean and inspect components.
MECH
INSP
MECH
INSP
Corrosion Temporary Treatment
1.
CHIPPED PAINT SURFACES - Apply corrosion
preventive compound (AMALGARD) to all chipped
surfaces until the area is treated and repainted.
2.
EXPOSED PORTIONS - Apply MIL-C-16173 to
applicable portions of the airplane in this phase of
the inspection, i.e., exposed rod ends, hinges and
swivels.
3.
DISCREPANCIES - Record all discrepancies on
attached corrosion control inspection checklist and
applicable publications.
Inspection Completed
A.
I certify that the Continuous Corrosion Control Inspection was performed in accordance with the King Air 90 Inspection Program
and that the airplane is approved for return to service:
DATE:
MECHANIC:
CREW CHIEF:
QUALITY CONTROL INSPECTOR:
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
UNSCHEDULED MAINTENANCE CHECKS - INSPECTION/CHECK
1.
Information
A.
This subchapter is assembled in chart form to allow a technician to perform checks for damage after operating the airplane in
conditions which could require unscheduled maintenance. Specific conditions, such as lightning strikes, turbulent air penetration
or hard landings, etc., are included. Inspection instructions are included for each of the conditions listed.
NOTE:
B.
2.
Additional inspections may be required by engine or propeller manufactures in their manuals. Refer to
the unscheduled maintenance checks portion of the supplier issued manuals to ensure continued
airworthiness.
In this chapter, ATA 20 references will be to the Standard Practices - Airframe Maintenance Manual, P/N 130-590031-487.
Unscheduled Maintenance Check Tables
Table 601. Operation in Atmospheres of High Salt Content
ITEM
1.
Engine Motoring Compressor
Wash
INSPECTION REQUIREMENT
a.
Engines operated in a
salty atmosphere should
be washed in accordance
with appropriate Engine
Maintenance Manual.
INSPECTION INTERVAL
Daily
Table 602. Operation in Atmospheres of High Industrial Air Pollution
ITEM
1.
Engine Motoring Compressor
Wash
INSPECTION REQUIREMENT
a.
b.
When there is a loss of
engine performance
attributed to ingestion of
air pollution deposits,
perform wash procedures
in accordance with
appropriate Engine
Maintenance Manual.
INSPECTION INTERVAL
As required
Inspect for corrosion.
Table 603. When Operating in Areas of High Dust Content
ITEM
1.
2.
Nose Landing Gear Shock Strut
Instrument Air Filters
INSPECTION REQUIREMENT
a.
a.
INSPECTION INTERVAL
Clean off and wipe dry
exposed polished
surfaces.
Routine
Replace instrument line
supply filters at or before
100 hours under extremely
dusty conditions.
As noted
CAUTION:
Disconnect the autopilot barometric altitude sensor line before applying reverse air pressure to pitot and static lines to
prevent damage to the barometric altitude sensor.
3.
Pitot and Static Lines
a.
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Retain printed data for historical reference only. For future maintenance, use only current data.
Check for obstructions by
applying reverse air
pressure (not to exceed 20
psi.) to the ends of the pitot
and static lines
disconnected from the
instruments.
200 Hours or as required
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
4.
Environmental Air Filter
a.
Inspect for obstruction of
air flow. Replace if
necessary.
As required
Table 604. When Operating in Areas of High Humidity
ITEM
INSPECTION REQUIREMENT
1.
Floor Structure
a.
Check structure under the
floor for corrosion by
removing a floor panel and
inspecting structure,
especially channel
sections.
2.
Aft Cabin
a.
Remove aft cabin access
covers and check for
corrosion, especially aft of
bulkhead points.
3.
Wing
a.
Remove wing and center
section access covers and
check for corrosion.
4.
Empennage
a.
Remove aft fuselage
access covers and check
for corrosion.
INSPECTION INTERVAL
At a scheduled inspection, but not more
than 6 months apart.
Table 605. Operating from Very Soft or Unusual Terrain
ITEM
1.
INSPECTION REQUIREMENT
INSPECTION INTERVAL
Tires
Visually check for cuts, wear, deterioration
and inflation.
Routine
b.
Struts
Check strut inflation (Ref. Chapter 12).
c.
Wheels
Remove and clean; inspect for abrasions,
cracks and chipped rims, bearings for
wear, corrosion, fretting and bluing; check
seals for distortion, deterioration, proper
fit, security and obvious damage.
Check cylinders and associated lines for
obvious damage and leaks.
Check for evidence of overheating.
Check discs for scoring, distortion,
damaged plating and evidence of
overheating.
Check surfaces for cleanliness, free from
oil or grease deterioration. Check strut
inflation (Ref. 12-20-33, 301).
Clean exposed surface of shock strut
piston with clean cloth moistened with
hydraulic fluid.
Main Landing Gear
a.
d.
e.
Brake Units
Shock Strut
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Every 100 hours
Routine
Every 100 hours
Every 200 hours
Every 100 hours
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
f.
2.
Wheel Wells
Clean foreign material (dirt, etc.) from
wheel wells. Inspect supports between
main and aft spars in upper wheel well and
the lift leg attach bracket at the main spar
for deformation, cracks, etc.
As required
Routine
Nose Landing Gear
a.
Tires
Visually check for cuts, wear, deterioration
and inflation.
b.
Wheels
Visually check for obvious damage.
Remove and clean. Inspect for abrasions,
cracks and chipped rims, bearings for
wear, corrosion, fretting and bluing; check
seals for distortion, deterioration, proper fit
and security.
c.
Shock Strut
Check for obvious damage and leaks.
Clean exposed surface of shock strut
piston with clean cloth moistened with
hydraulic fluid. Check strut inflation (Ref.
12-20-33, 301).
Routine
Every 100 hours
Routine
Check for correct extension (Ref. Chapter
32).
Thoroughly clean and inspect for leaks,
damage and security. Service as
necessary.
3.
d.
Fork Assembly
Check for cleanliness and obvious
damage.
e.
Nose Wheel Steering
Check for obvious damage, associated
rods and connections for damage.
f.
Actuator Linkage
Check for excessive play, safety and
security.
g.
Shimmy Damper
h.
Actuator
Inspect for condition and attachment (Ref.
Chapter 32).
Check actuator and support brackets for
visible damage and condition. Inspect
bracket for loose or missing rivets. Inspect
cover and bottom assembly of actuator for
cracks at mounting lug.
Every 100 hours
Routine
Every 100 hours
Engine
a.
Air Intakes
b.
Ice Shredder Screen
c.
Air Conditioning Inlet
d.
Engine Inertial Anti-Icer
Check the air intakes to make sure that
they are not damaged or blocked.
Check the ice shredder screen to make
sure that it is not damaged or blocked.
Check the air conditioning inlet to make
sure that it is not damaged or blocked.
Check the engine inertial anti-ice vanes
and linkage for damage.
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Retain printed data for historical reference only. For future maintenance, use only current data.
First flight of the day
Every 100 hours
First flight of the day
Page 3 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
Table 606. Inspection After Hard or Overweight Landing
ITEM
INSPECTION REQUIREMENT
INSPECTION INTERVAL
WARNING:
Even though "wrinkles" in the wing or fuselage skin surface may be slight enough to be considered as negligible, a
close inspection of the internal supporting structure may reveal serious damage.
NOTE:
The airplane has been designed to withstand a vertical descent velocity of 6ft./second at the maximum take-off weight
and 10 ft./second at the maximum landing weight. Closely related to a hard landing is an overweight landing, which is
defined as landing the airplane with a vertical decent rate greater than 360 ft/min (feet per minute) when the airplane
gross weight is greater than the maximum landing weight but less than maximum take-off weight. An overweight
landing is also any landing when the airplane gross weight is greater than maximum take-off weight.
This inspection should be carried out after a hard or overweight landing and before the airplane is certified as ready for
further flight. The inspections are conducted at two levels. The first level consists of determining if any external damage
has occurred and looking for evidence of internal structural failure. The second level is concerned with a more detailed
inspection of any damage areas which were indicated in the findings of the first level inspection. If it is determined by
the first level inspection that there is no damage to the airplane, it is not necessary to proceed to the second level
inspection.
1.
First Level Inspection
Inspect tires for excessive wear, splits in
the tread, bottoming out or folding over the
side walls.
Check the wheels for flat spots or cracked
castings.
Check shock struts and attachment lugs for
cracks Inspect hydraulic brake lines for
leaks.
Inspect downlock, drag link and gear door
retract linkage for damage.
Inspect landing gear actuator attachment
lugs.
Inspect supports between main and aft
spars in upper wheel well and the lift leg
attach bracket at the main spar for
deformation, cracks, etc.
Inspect areas around landing gear attach
points.
Inspect the main landing gear drag brace
support structure as follows:
a.
Landing Gear
•
Place the airplane on jacks.
•
Disconnect the upper drag brace
from the airplane structure in both
the LH and RH wheel wells.
•
Using a flashlight and mirror,
inspect all of the drag brace
support structure for possible
cracks, particularly at the lower
radius of the U-channel where it
attaches to the main spar.
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After hard landing
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
•
If cracks are suspected but are not
clearly defined, the suspect area
should be dye penetrant inspected,
using visible dyes as outlined in
AC43.13.1B/2B.
•
If cracks are found, contact
Technical Support and report the
findings for evaluation.
•
If no cracks are found, reinstall the
drag brace.
NOTE:
Textron Aviation recommends that airplanes having experienced severe, or hard landings or other abnormal landing
incidents which may have placed undue stress on the landing gears, are to be inspected within the first 100 service
hours after such hard landing and at each 600 service hours thereafter for two consecutive cycles.
NOTE:
Airplanes having received repairs in this area, upon Textron Aviation recommendations, are exempt from this
inspection except in the event of a future hard or abnormal landing incident.
b.
Nacelles
Inspect external skin surfaces for distortion,
loose or missing rivets.
Check cowling attachment fittings for
alignment or damage.
Inspect engine control cables for smooth
operation and check plumbing and wiring
for security and attachment.
Inspect engine support mounts for cracks
or structural failure. Check tips of
propellers for damage.
After hard landing
Check propeller spinner and backplate for
evidence of interference with cowling.
c.
d.
Wing Center Section
Outboard Wing Panels
Inspect wheel well structure for damage or
cracks. Check area surrounding the
landing gear attachment points.
Inspect external skin surface (upper and
lower) for cracks, abnormal wrinkles and
loose or missing rivets.
Inspect plumbing, wiring and actuators for
damage and security of attachment.
Check keel, front and rear spar on the
lower side of fuselage for damage and
alignment.
Inspect external wing surface skin for
cracks, abnormal wrinkles and loose or
missing rivets.
Check wing attachment fittings for cracks.
Inspect internal structure and fuel cells
through access panels.
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After hard landing
After hard landing
Page 5 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
Inspect plumbing and wiring for security of
attachment.
e.
Fuselage Nose Section
Check external skin surface for cracks,
abnormal wrinkles and loose or missing
rivets.
Check wheel well structure and area
surrounding gear attach point for damage.
After hard landing
Inspect avionics, radar antenna, wiring and
plumbing for security and attachment.
f.
Fuselage Center Section
Inspect external skin surface for cracks,
abnormal wrinkles and loose or missing
rivets.
After hard landing
Inspect around cabin windows for structural
cracks.
g.
Fuselage Nose Section
Check external skin surface the entire
length for cracks, abnormal wrinkles and
loose or missing rivets.
After hard landing
Inspect empennage and control surfaces
for freedom of movement.
2.
Second Level Inspection
NOTE:
Because shock loading may be transmitted along one structural member to another, carefully inspect the surrounding
and supporting structure in any damaged area found in the first level inspection.
a.
Landing Gear
Place the airplane on jacks and check
shock strut for free up and down
movement.
Remove the tires and inspect internally for
cuts or broken areas.
Disassemble and examine wheels for
cracks or distortion.
b.
Nacelles
Visually inspect axle with 10-power glass. If
suspect, dye check or magnaflux.
Remove and replace or magnaflux the
landing gear attach bolts, check bolt holes
for cracks or elongation.
Remove and replace or magnaflux drag
link bolts and supports.
Make landing gear retraction test.
If tips of propeller have been damaged,
refer to the Engine Maintenance Manual for
engine inspection procedure for propeller
strike.
Inspect areas surrounding the engine
mounts.
Check the internal structure of the wheel
well for cracks or damage.
Test plumbing and wiring for proper
operation.
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Retain printed data for historical reference only. For future maintenance, use only current data.
After hard landing
After hard landing
Page 6 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
c.
d.
e.
f.
Wing Center Section
Outboard Wing Panels
Fuselage Nose Section
Fuselage Center and Aft
Section
Dye check wing attachment fittings;
examine (magnaflux or replace)
attachment bolts and check bolt holes for
alignment and correct dimensions.
Remove floorboards and access plates
and inspect the front and rear spar and
keel structure for evidence of deformation
or structural failure.
Test plumbing, wiring, flaps, control cables,
pulley mounts and any other system found
in this area for proper operation.
Dye check wing attachment fittings;
examine (magnaflux or replace)
attachment bolts and check bolt holes for
alignment and correct dimensions.
Test plumbing and wiring for proper
operation.
Inspect fuel cells and lines for leakage and
damage.
Remove baggage compartment
floorboards and inspect the keel structure
and supporting members for damage.
Inspect wheel well structure and
surrounding areas for signs of structural
failure.
After hard landing
After hard landing
After hard landing
Test avionics, radar antenna, plumbing and
wiring for proper operation.
Examine stringers, frames and side walls
for deformation or structural failure.
Test plumbing and wiring for proper
operation.
Inspect heating and air conditioning ducts
for damage.
Examine the control cables and pulley
mountings and check for clearance from
structure at pass-through locations. Ensure
a smooth operation.
After hard landing
Table 607. Inspection After Encountering Turbulent Air
ITEM
INSPECTION REQUIREMENT
INSPECTION INTERVAL
WARNING:
Even though "wrinkles" in the wing or fuselage skin surface may be slight enough to be considered as negligible, a
close inspection of the internal supporting structure may reveal serious damage.
Determine that the airframe components (nacelles, wings, fuselage and empennage) are in their normal configuration.
Copyright © Textron Aviation Inc.
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Page 7 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
NOTE:
This inspection should be carried out after the airplane has been subjected to high G loading while flying through
turbulent air and before the airplane is returned to service. The inspection is conducted on two levels. The first level
consists of determining if any external damage has occurred and looking for evidence of internal structural failure. The
second level is concerned with a more detailed inspection of damaged areas which were indicated in the findings of
the first level inspection. If it is determined by the first inspection that there is no damage to the airplane, it is not
necessary to proceed to the second level inspection.
1.
a.
b.
Wing Center Section
Nacelles
First Level Inspection
Inspect tires for excessive wear, splits in
the tread, bottoming out or folding over the
side walls.
Check wing attachment fittings for cracks.
Inspect plumbing, wiring and actuators for
damage and security of attachment.
After encountering turbulent air
Check the keel and the front and rear spar
on the lower side of the fuselage for
damage and alignment.
Inspect the external skin surfaces for
wrinkles and loose or missing rivets.
Check cowling attachment fittings for
alignment or damage.
Inspect the engine support mounts for
cracks, deformation or structural failure.
After encountering turbulent air
Inspect engine control cables for smooth
operation and check plumbing and wiring
for security and attachment.
Inspect structure in wheel well for damage
or cracks.
c.
Outboard Wing Panels
Inspect external wing surface skin for
cracks, abnormal wrinkles and loose or
missing rivets.
Check wing attachment fittings for cracks.
Inspect internal structure and fuel cells
through access panels.
NOTE:
Fuel cell removal is not required, nor
should the fuel cells be disturbed for
this inspection.
d.
Fuselage Nose Section
After encountering turbulent air
Inspect plumbing and wiring for security of
attachment.
Check external skin surface for cracks,
abnormal wrinkles and loose or missing
rivets.
Inspect area forward of windshield for
evidence of structural deformation or
failure.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
After encountering turbulent air
Page 8 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
e.
Fuselage Center Section
f.
Fuselage Aft Section
Inspect avionics, antenna and components
for security and attachment.
Inspect external skin surface for cracks,
abnormal wrinkles and loose or missing
rivets.
Inspect the entire length of the external skin
surface for cracks, stress wrinkles and
loose or missing rivets.
Check the empennage surfaces for
damage and freedom of movement.
Inspect for skin wrinkles at the juncture of
the fuselage and empennage. Check
controls for freedom of movement.
2.
After encountering turbulent air
After encountering turbulent air
Second Level Inspection
NOTE:
Because shock loading may be transmitted along one structural member to another, carefully inspect the surrounding
and supporting structure in any damaged area found in the first level inspection.
a.
b.
Landing Gear
Nacelles
Dye check wing attachment fittings;
examine (magnaflux or replace)
attachment bolts and check bolt holes for
alignment and correct dimensions.
Remove floorboards and access plates
and inspect the front and rear spar and
keel structure for evidence of deformation
or structural failure.
Test plumbing, wiring, flaps, control cables,
pulley mounts and any other system found
in this area for proper operation.
Inspect areas surrounding the engine
mounts.
Inspect internal structure for cracks or
damage.
Operational test plumbing and wiring.
c.
d.
e.
Outboard Wing Panels
Fuselage Nose Section
Fuselage Center and Aft
Section
After encountering turbulent air
If there is evidence of damage to the fuel
cells or fuel lines, remove the cells and
inspect the fuel cell liners and liner support
structure.
Operational test the plumbing and wiring,
flap actuator, aileron and tab mounting.
Remove the floorboards and inspect the
keel structure and supporting members for
damage.
Examine any fixed equipment for loose,
broken or cracked mountings.
After hard landing
After hard landing
After hard landing
Operational test the avionics, radar
antenna, plumbing and wiring.
Examine stringers, frames and side walls
for deformation or structural failure.
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Page 9 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
Operational test plumbing and wiring.
Inspect heating and air conditioning ducts
for damage.
Examine the control cables and pulley
mountings and check for clearance from
structure at pass-through locations. Ensure
a smooth operation.
f.
Empennage
After hard landing
Inspect elevator pushrods, torque tubes
and bell crank for damage.
Inspect the attachment of the vertical
stabilizer spars to the top of the fuselage
for evidence of damage.
Inspect skin surfaces for condition and
loose or missing rivets.
Check structure for cracks, loose or
missing rivets and/or concealed damage.
Check rudder for freedom of movement
and attachment.
After encountering turbulent air
Check elevator for freedom of movement
and attachment.
Check trim tab actuators for smoothness of
operation and attachment. Check the
wiring of the electrical trim tab actuator for
connection, security of attachment and
condition. Check the electrical trim tab
actuator for full travel and security of
attachment.
REPAIR OF DAMAGE
Due to the variety and degree of structural damage which may be involved, the best repair or replacement procedure must be
based on the findings of the individual airplane. If the turbulent air inspection indicates that serious structural damage has occurred,
contact the Customer Support Department, Textron Aviation, Wichita Kansas, 67201 for assistance.
LOG BOOK ENTRY
Following a turbulent air inspection, an entry covering the extent of inspection, the damage and the repair (if applicable) must be
noted in the airplane permanent records.
Table 608. Inspection After Lightning Strike
ITEM
INSPECTION REQUIREMENT
INSPECTION INTERVAL
CAUTION:
Propellers must be inspected and/or replaced utilizing the data provided in the applicable manufacturers manual prior
to returning the airplane to service following any lightning strikes or other impact damage.
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Page 10 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
1.
Propeller
2.
Engine
3.
Fuselage, Empennage and
Wing Surfaces
At times, the difficulty is not in inspecting
the airplane, but in determining if a strike
has taken place. Most times, an exit
location will show which has caused
damage to the components. The entry
point is most often the propeller. A
darkened area in the propeller tip may be
noticeable after a lightning strike. A 3- to 5power magnifier will show slag at the
bottom of a "nick" in the propeller blade. If
a strike is suspected, inspect deep nicks
in the blade. Damage after a lightning
strike should be corrected utilizing the
applicable propeller manufacturer
procedure. Blade overhaul must be
accomplished by a certified propeller
mechanic.
Whenever the propeller has been struck by
lightning, the propeller governors must be
replaced or overhauled. Refer to
Woodward Service Bulletin 33574 or
subsequent revision.
Inspect as instructed in the appropriate
Engine Maintenance Manual.
Carefully inspect the exterior of the
airplane. Evidence of a strike will usually
appear as a burned hole or as a series of
burned holes in metallic surfaces. Plastic
parts may be delaminated and/or
deformed due to high internal pressures.
Normally two or more points will be found,
the entry and the exit points. Antennas are
frequently an entry point of lightning and
should be carefully inspected for evidence
of arcing, sooting or pitting.
From point of entry, the strike usually
spreads aft in a series of small holes or
burn marks. After points of entry and exit
are found, the structure between these
points should be carefully inspected.
Attention should be given to hinges and
hinge pins for possible pitting. Cables,
pulleys, bearings, bolts and all bonding
jumpers in the area should be inspected
for possible damage. Antennas and
electrical and electronic equipment should
be visually checked for damage and
functionally checked for operation. If the
strike was near the fuel vent, all plumbing
should be carefully inspected for damage.
Steel components may exhibit magnetism
and require degaussing so as not to affect
compass systems.
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Retain printed data for historical reference only. For future maintenance, use only current data.
After lightning strike
After lightning strike
After encountering turbulent air
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King Air 90 Series Maintenance Manual (Rev D1)
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Table 609. Engine Inspection After Sudden Stoppage
ITEM
1.
Engine
2.
Propeller Governor
INSPECTION REQUIREMENT
Inspect as instructed in the appropriate
Engine Maintenance Manual.
The propeller governors should be
overhauled or replaced as instructed in
Woodward Maintenance Manual P/N
33048F or subsequent. Refer to
Woodward Service Bulletin 33574 or
subsequent.
Whenever the engine has a sudden
stoppage, the propeller must be
overhauled or replaced.
3.
Propeller
4.
Fuselage and Empennage Skin Inspect skin panels for wrinkles, cracks,
deformities and bond separation.
- Aft of the Aft Pressure
Bulkhead
INSPECTION INTERVAL
After sudden engine stoppage
After sudden engine stoppage
After sudden engine stoppage
After sudden engine stoppage
Table 610. Inspection After Deployment of Landing Gear Above Critical Speed Condition
ITEM
INSPECTION REQUIREMENT
INSPECTION INTERVAL
WARNING:
Even though wrinkles in the skin surfaces may be considered slight enough to be considered as negligible, a close
inspection of the internal supporting structure may reveal serious damage. Determine that the surfaces are in their
normal configuration when stowed or deployed.
NOTE:
This inspection should be carried out after the landing gear doors have been deployed at an airspeed above the critical
deployment speed and before the airplane is returned to service. The inspection will be conducted on two levels. The
first level consists of determining if any external damage has occurred and looking for evidence of internal structural
failure. The second level is concerned with a more detailed inspection of damaged areas which were indicated in the
findings of the first level inspection. If it is determined by the first level of inspection that there is no damage to the
landing gear door and surrounding structure, it is not necessary to proceed to the second level inspection.
1.
a.
General Appearance
b.
Landing Gear Door
First Level Inspection
Determine that the airframe components
(landing gear and flaps) are in their normal
configuration.
Inspect the skin panels for wrinkles, cracks
and bond separation.
Inspect for loose or missing rivets, bolts,
and bearings.
Inspect hinges, linkages, fittings and
support structure for damage, alignment
and security attachments. Check required
clearances and overcenter requirements.
After landing gear doors have been
opened above critical speed condition
After landing gear doors have been
opened above critical speed condition
Check gear door free play (Ref. Chapter
32).
2.
Second Level Inspection
NOTE:
Since loads may be transmitted along one structural member to another, carefully inspect the adjacent members to any
damaged element found in the first level inspection.
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Page 12 of 18
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
1.
Inspection of Damaged Areas
Remove the skin panels and conduct
inspection by employing nondestructive
test methods (acoustic, x-ray, and/or dye
penetrant inspection). Inspect fastener
holes for cracking. Repair or replace as
determined by the extent of the damage.
In case of missing or loose fasteners,
disassemble and inspect holes and fittings
for distortion of holes and cracking. Repair
or replace accordingly as determined by
the extent of damage.
Hinges, linkages, fittings, bearings and
support structure which exhibit damage,
alignment, and/or security attachment will
be disassembled if possible and
inspected. Repair or replace accordingly
as determined by extent of damage.
Inspect gear door free play after all repairs,
checks and alignments have been made.
Check operation of door from stowed
through deployment(Ref. Chapter 32).
Repair or replace accordingly as
determined by extent of damage.
After landing gear doors have been
opened above critical speed condition
REPAIR OF DAMAGE
Due to the variety and degree of structural damage which may be involved, the best repair or replacement procedure must be
based on the inspection findings of the individual airplane. If the preceding inspection indicates that serious structural damage has
occurred, contact Technical Support, Textron Aviation, Wichita, KS, 67201, for assistance.
LOG BOOK ENTRY
Following the inspection, an entry covering the extent of inspection, damage and repair (if applicable) must be noted in the
permanent records.
Table 611. Inspection After Deployment of Flaps Above Critical Speed Condition
ITEM
INSPECTION REQUIREMENT
INSPECTION INTERVAL
WARNING:
Even though wrinkles in the skin surfaces may be considered slight enough to be considered as negligible, a close
inspection of the internal supporting structure may reveal serious damage. Determine that the surfaces are in their
normal configuration when stowed or deployed.
NOTE:
This inspection should be carried out after the landing gear doors have been deployed at an airspeed above the critical
deployment speed and before the airplane is returned to service. The inspection will be conducted on two levels. The
first level consists of determining if any external damage has occurred and looking for evidence of internal structural
failure. The second level is concerned with a more detailed inspection of damaged areas which were indicated in the
findings of the first level inspection. If it is determined by the first level of inspection that there is no damage to the
landing gear door and surrounding structure, it is not necessary to proceed to the second level inspection.
1.
a.
General Appearance
b.
Flaps
First Level Inspection
Determine that the airframe components
After the flaps have been actuated above
(landing gear and flaps) are in their normal
critical speed condition
configuration.
Inspect the skin panels for wrinkles, cracks,
and bond separation.
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King Air 90 Series Maintenance Manual (Rev D1)
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Inspect for loose or missing rivets, bolts,
and bearings.
After the flaps have been actuated above
Inspect tracks, screws, linkages, fittings,
critical speed condition
flap brackets, actuators, wing brackets and
support structure for damage, alignment
and security attachment.
Check phase alignment between adjacent
flaps. Check correlation between flap
position and cockpit indicator.
2.
Second Level Inspection
NOTE:
Since loads maybe transmitted along one structural member to another, carefully inspect the members adjacent to any
damaged element found in the first level inspection.
a.
Inspection of Damaged
Areas
Remove the skin panels and conduct
inspection by employing nondestructive
test methods (acoustic, x-ray, and/or dye
penetrant inspection). Inspect fastener
holes for cracking. Repair or replace as
determined by the extent of the damage.
In case of missing or loose fasteners,
disassemble and inspect holes and fittings
for distortion of holes and cracking. Repair
or replace accordingly as determined by
After the flaps have been actuated above
the extent of damage.
critical speed condition
Hinges, linkages, fittings, bearings and
support structure which exhibit damage,
alignment, and/or security attachment must
be disassembled if possible and
inspected. Repair or replace accordingly
as determined by extent of damage.
Inspect hinges, linkages, fittings and
support structure for damage, alignment,
and security attachments. Check required
clearances and over-center requirements.
REPAIR OF DAMAGE
Due to the variety and degree of structural damage which may be involved, the best repair or replacement procedure must be
based on the inspection findings of the individual airplane. If the inspection indicates that serious structural damage has occurred,
contact Technical Support, Textron Aviation, Wichita, KS, 67201, for assistance.
LOG BOOK ENTRY
Following the inspection, an entry covering the extent of inspection, damage and repair (if applicable) must be noted in the
permanent records.
Table 612. Inspection in the Event of Deformed Steering Stop
ITEM
1.
Nose landing gear
INSPECTION REQUIREMENT
INSPECTION
INTERVAL
Inspect the lower portion of the nose landing gear for evidence of fluid
leaks.
If an external leak is visible from the side of the upper nose landing
gear brace assembly, the part must be replaced.
If no evidence of fluid leakage is found, remove the steering stop.
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
Visually inspect the inner and outer sides of both stop support lugs on
the aft side of the nose landing gear upper brace for cracks.
If a crack is visible, replace the stop support lugs (upper brace
assembly).
If no evidence of cracks are detected visually, inspect the inner and
outer sides of both stop support lug areas using fluorescent penetrant.
If evidence of a crack is detected, replace the stop support lugs (upper
brace assembly).
If no evidence of cracks is detected using fluorescent penetrant,
replace the steering stop.
When installing the steering stop, peel shim as required to maintain a
total clearance of 0.00 to 0.002 inch between the stop and brace. Install
shim on each side of the steering stop to center the stop between the
lugs.
After steering stop is
deformed
When installing nuts and bolts, snug (finger tight) using a minimum of
one washer to allow installation of cotter pin. Do not overtorque nuts.
3.
Operations In or Around Volcanic Ash
Flight operations in or exposure to volcanic ash may cause airframe damage and/or systems degradation. Volcanic ash is highly
corrosive and airborne ash particles can be abrasive to exterior components and coatings. Additionally, ash can contaminate and
even obstruct airframe systems and components such as heat exchangers, environment cooling turbines, water separator socks, and
pitot-static system plumbing.
Engine components and filter may become contaminated with volcanic ash.
If an airplane has been operated in or exposed to volcanic ashes, including ash cloud fallout, perform an ash encounter survey,
before the next flight, to determine the level of contamination or damage and formulate a maintenance plan to maintain continued
airworthiness.
A. Ash Encounter Survey
In most cases, an initial indicator of volcanic ash encounter will be noted on a post flight or preflight inspection. In more extreme
cases, the crew may actually experience an in-flight engine or airframe system performance degradation. A dusting or fogging
of the cockpit and/or cabin interior and furnishings may also be noted as volcanic ash is circulated by the airplanes air
distribution system. If the pilot determines a more in depth ash encounter survey is necessary, guidelines for this survey and
recommended maintenance actions are provided in the following.
If an airplane has been operated in or exposed to volcanic ashes, taxied on airfields subjected to volcanic ash fallout, or
exposed to blowing ash, this survey will require gaining access to the avionics area, wing flap cove areas, landing gear wheel
wells, engine compartment and fuselage area.
This survey should be conducted by personnel familiar with airframe configuration and systems of the airplane involved. As a
general rule, the Airplane Flight Manual (AFM), Preflight Inspection; EXTERIOR INSPECTION, will provide a logical path
through the areas of exterior evaluation. While conducting this inspection, particular attention should be given to airframe and
engine leading edge surfaces, engine air inlet and exhaust areas, external lights and lenses, and fuselage air inlet and exhaust
openings and drains (including the pitot-static system) for abrasion or contamination. Wing flap, airframe cavities, low points or
other semi protected areas may harbor ash deposits as well. For the interior of the airplane, attention should be given to air
distribution ducts and/or air outlets and cockpit and cabin furnishings for evidence of ash deposits.
Pilot reports of in-flight ash encounter and any associated airplane performance issues should also be considered during this
survey. This information, along with any inspection findings, should be reviewed to determine the volcanic ash exposure.
(1) VOLCANIC ASH EXPOSURE SURVEY
If airplane survey findings and/or pilot reports indicate any of the following, do the related MAINTENANCE ACTION(S)
before the next flight.
•
Acrid odor (e.g. smell of sulfur gas or a hot electrical smell) noted in the cockpit or cabin area.
•
Visible airborne particles or contaminants, or similar report of air quality, in the cockpit or cabin area during flight.
•
Dusting or ash particles in the cockpit or cabin area.
•
Electrostatic discharge (St. Elmo's fire) on windshield, nose or engine cowlings.
•
Engine exhaust gas temperature (ITT) fluctuations with return to normal values.
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
NOTE:
•
•
•
•
•
•
•
•
•
•
•
•
B.
Light unpainted surface abrasion is defined as a slight surface roughness when felt with the
fingers or viewed with magnification. Light painted surface erosion is defined as erosion of
the topcoat of paint only but the base primer is still visible. No bare metal or composite
material is exposed.
Moderate unpainted surface abrasion is defined as a visible surface roughness when view
from a distance of approximately 3 feet (1 meter) using ambient daytime lighting. Moderate
paint erosion is defined as erosion through the top coat and base primer, exposing the
underlying bare metal or composite material.
Heavy unpainted surface abrasion is defined as the removal of base metal or composite
material from a main structure or subassembly. Heavy paint erosion is defined as removal of
the top coat, base primer and any portion of bare metal or composite material.
Light, moderate or heavy unpainted surface abrasion to the leading edge surfaces of windshield retainers, wings,
engine inlets and horizontal stabilizer. This criterion also applies to landing and navigation lights and lenses.
Ash deposits accumulated in the nose avionics compartments, landing gear wheel wells and/or wing flap, aileron,
aileron tab, rudder, rudder tab, elevator, elevator tab cove areas. Light surface dust is permissible.
Obstruction or plugging of pitot tubes and/or static ports resulting in erroneous instrument readings.
Ash deposits noted from pitot-static system drains.
Painted surface erosion of radome, vertical stabilizer leading edge and elevator horns.
Ash deposits present in the air distribution system components.
Frosting or chipping of cockpit windshields, landing and navigation lights and lenses due to impact of ash.
Ash deposits in any air intakes.
Engine damage.
Vibration, surging of engine.
Uncommanded In-flight engine shutdown.
Loss of engine generator due to ingestion of ash.
Maintenance Action
WARNING: Do not spray water on electrical or avionics components.
WARNING: Before doing external cleaning, desalination and washing of the airplane engines it is emphasized that
a compressor wash should only be done if specified by the engine manufacturer's technical data.
NOTE:
In addition to the tasks listed below, refer to the Pratt and Whitney Service Information Leaflet (SIL)
GEN-104 or subsequent revision thereof.
NOTE:
After an airplane has encountered low volcanic ash concentrations in flight, perform a visual inspection
(to include, but not limited to) the following areas for signs of abrasion or ash contamination during
pre/post-flight walk around (reference appropriate Flight Manual):
NOTE:
Volcanic ash deposits should be completely removed from all airframe and engine surfaces, including
all wing and flight control enclosures, landing gear wheel well areas and nacelles. If the surface
accumulation of ash deposits is greater than ¼ inch (6 mm), initial removal should be accomplished
with the hand brushes or vacuum equipment. Ash deposits which collect in close tolerance areas or
moving surface hinge points may cause sticky or binding operation. Personal Protective Equipment
(PPE) should be worn, when applicable, when removing volcanic ash.
(1) Perform a clear, fresh water rinse of the airplanes exterior structure, including all wing and flight control enclosures and
landing gear wheel well areas (Ref. 20-08-00, 201). - Rinse all areas thoroughly with water. No ash deposits should
remain. Avoid spraying water directly on electrical/avionics components.
(2) Following a clear, fresh water rinse, inspect airframe and engine cavities and low points for standing water. Remove any
standing water to prevent corrosion formation.
ITEM
MAINTENANCE ACTIONS
1.
Nose Landing Gear Shock
Strut
a.
Clean off and wipe dry exposed polished surfaces.
2.
Main Landing Gear Shock
Struts
a.
Clean off and wipe dry exposed polished surfaces.
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
3.
Instrument Air Filters
a.
Replace instrument line supply filters if volcanic ash found on
filter element.
4.
Pitot and Static System
a.
Visually inspect the pitot and static system for ash
contamination:
CAUTION:
Before blowing the lines through or applying reverse air
pressure to the pitot and static lines, disconnect all
instruments using pitot and/or static inputs.
CAUTION:
To avoid damaging the barometric sensor; disconnect
the autopilot sensor line prior to applying reverse air
pressure to the pitot and static lines.
•
•
•
If the lines and/or drain valves are contaminated, blow
the system through with dry air until contamination is
cleared.
If the lines are obstructed, apply reverse air pressure
(not to exceed 20 psi) to the ends of the pitot and static
lines until obstruction is cleared.
If the pitot head is contaminated - clean. If the pitot head
cannot be sufficiently cleaned - replace.
5.
Avionics Equipment
a.
Inspect for presence of volcanic ash. Refer to avionics
equipment manufacturer documentation for specific servicing
and repair information.
6.
Windshield
a.
Visually inspect windshield for condition, erosion and
obstruction.
7.
Wing Leading Edges
a.
Visually inspect wing leading edges for condition, erosion and
obstruction.
8.
Flaps, Ailerons, Elevators,
Rudder and their Associated
Tab Coves
a.
Visually inspect flaps, ailerons, elevators, rudder and their
associated tab coves for condition, erosion, obstruction and
freedom of movement.
9.
All Flight Controls
a.
Visually inspect all flight control edges for condition, erosion,
obstruction and freedom of movement
10. Horizontal and Vertical
Stabilizers
a.
Visually inspect horizontal and vertical stabilizers for condition,
erosion and obstruction.
11. Air Intakes
a.
Visually inspect air intakes for condition, erosion and
obstruction.
12. Heater and Heater Ducts
a.
Visually inspect the heater and heater ducts for condition,
erosion and obstruction.
CAUTION:
Follow specific engine manufacturer's recommendations for possible volcanic ash encounters.
13. Engine and Cowling
a.
Visually inspect the engine and cowling for condition, erosion
and obstruction
14. Propeller
a.
Visually inspect the propeller for condition, erosion and
obstruction. Refer to appropriate propeller manufacture's
documentation for maintenance instructions.
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King Air 90 Series Maintenance Manual (Rev D1)
05-50-00 (Rev D0)
15. All protruding
structures/components (OAT
probes, stall warning vanes,
antennas, radome, pitot
tubes, etc.)
a.
Visually inspect all protruding structures/components for
condition, erosion and obstruction. Check for freedom of
movement, if applicable.
After completing the above inspection, Textron recommends:
•
•
Do the lubrication requirements found in the LUBRICATION SCHEDULE (Ref. 12-20-11, 301).
Do the landing gear extension/retraction verification check (Ref. Chapter 32).
DAMAGE REPAIR
Due to the variety and degree of structural and/or component damage which may be involved, the best repair or
replacement procedure must be based on the inspection findings of the individual airplane. If the contact with volcanic ash
inspection indicates that serious corrosive of abrasion damage has occurred, contact Technical Support, Textron
Aviation, Wichita, KS 67201, for assistance.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
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