Cessna
Operational &
Maintenance
Procedures
Cessna Aircraft Company
525B (Citation CJ3)
THIS GUIDE IS CURRENT WITH THE MASTER MINIMUM EQUIPMENT LIST WHICH IS
DISTRIBUTED BY THE DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION
ADMINISTRATION - REVISION 01 DATED 02/26/2014.
COPYRIGHT © 2013
MMEL REVISION 01
CESSNA AIRCRAFT COMPANY
WICHITA, KANSAS, U.S.A.
COMP REVISION 01
525BCOMP-01-01
i
NOTICE
The Master Minimum Equipment List (MMEL) is distributed by the
Department of Transportation Federal Aviation Administration. This
Master Minimum Equipment List Operation and Maintenance
Procedures manual contains only the items from the Master Minimum
Equipment List which have Maintenance (M) or Operational (O)
procedure requirements. Cessna does not support Minimum
Equipment List items not published in the MMEL.
Cessna’s policy is to revise this manual only to accommodate
changes to a new MMEL revision, which requires a change to, or a
new, Maintenance (M) or Operational (O) required procedure. If a
revised MMEL is released, but does not affect any required procedure,
the Operational and Maintenance manual will not be revised at that
time. Cessna reserves the right to make format changes without
generating a new revision.
Maintenance (M) or Operational (O) procedures in this manual are
recommended by Cessna Aircraft Company. Most of the procedures
in this manual have been approved in some MEL’s. This document is
not FAA approved, but is intended to aid operators in writing and
gaining approval for their specific Minimum Equipment List (MEL).
The Operator is responsible to make sure that all crew members are
properly trained in the use of MEL (M) and (O) procedures.
The Narrative section of each Maintenance (M) procedure is intended
to satisfy the FAR 135 MEL requirement for training non-maintenance
individuals who are authorized, in the MEL, to perform maintenance
tasks.
525BCOMP-01-01
ii
NOTICE
14 CFR 91 operators must have the following statement included in
their COMPs Manual or operator produced Procedures Guide. All
other operators must remove or delete the following statement.
THIS DOCUMENT IS APPLICABLE TO PART 91 OPERATIONS ONLY
AND MAY NOT BE USED FOR OPERATIONS CONDUCTED UNDER
PARTS 121, 125, 129, OR 135.
525BCOMP-01-01
iii
NOTES
For all provisos – Unless the proviso requires a system to be verified,
it is assumed that all other systems are operative and no action is
required to test these systems.
Where ever a dash (-) is listed in Column 2: Number Installed or
Column 3: Number Required for Dispatch, it is the responsibility of
the operator to replace the dash (-) with the actual number of each
item, if any, installed on the aircraft in question.
The operator must make an appropriate entry in the discrepancy
report for each inoperative item.
The diagrams, drawings and/or pictures in this document may not
reflect all possible installations. Refer to the aircraft equipment list,
continuous history report and/or STC for current installed equipment.
The Code of Federal Regulations (CFR), Title 14, Aeronautics and
Space, listed in this document may not be up to date with the most
current regulation. It is the responsibility of the operators to make
sure all applicable 14 CFR parts are listed in their operational
documents.
The maintenance procedures in this document may be different than
those found in the current revision of the Cessna Maintenance Manual
for the associated aircraft model. In the event of conflict, use the more
restrictive maintenance procedure to accomplish the task.
525BCOMP-01-01
iv
PLACARDING REQUIREMENTS
When relief is taken for an item listed in a MMEL or operator’s MEL,
regulations require the operator to placard the item or system as
inoperative or missing. The following guidelines are designed to
assist operators with placarding inoperative or missing items or
systems. Operators may develop alternate procedures for placarding
inoperative or missing items or systems.
Placards should be placed above, adjacent to or on the associated /
affected control (annunciator, circuit breaker, switch, button, gauge,
indicator, knob or light).
Pre-manufactured “INOP” or “INOPERATIVE” placards may be used
at the discretion of the operator.
For missing items or systems, the placard should include text which
specifies the component that is missing.
If the inoperative item or system is not within view of the flight crew,
an additional placard should be placed on the instrument panel in
view of the flight crew. The placard should include text which
specifies the component that is inoperative.
If the relief for an item or system includes limitations on aircraft
operations, an additional placard should be placed on the instrument
panel in view of the flight crew. The placard should include text which
states the limitation. If the limitation contracts a permanent placard
installed in the cockpit as a part of the certified aircraft, the placard
should be placed adjacent to the permanent placard. For example, a
placard restricting VMO should be placed near the MAX OPERATING
SPEED placard. Examples of common limitations on aircraft
operations are:




RVSM OPERATIONS ARE PROHIBITED
OPERATIONS IN IMC ARE PROHIBITED
FLIGHT INTO ICING IS PROHIBITED
OPERATIONS AT NIGHT ARE PROHIBITED
525BCOMP-01-01
v




CARRIAGE OF CABIN OCCUPANTS IS PROHIBITED
CARRIAGE OF CARGO (EXCLUDING BALLAST) IS PROHIBITED
SINGLE-PILOT OPERATIONS ARE PROHIBITED
OPERATIONS ABOVE FL410 ARE PROHIBITED
For indications shown on an electronic display, the placard should be
placed adjacent to or on the bezel of the display and should include
text which specifies the indication that is inoperative. The placard
should NOT be placed on the display as this may obstruct the view of
other indications in alternate or reversionary modes. This also applies
to specific software functions or items within a system such as a
Flight Management System (FMS) Navigation Database.
Placards installed on equipment used by cabin passengers should
include text such as “DO NOT USE” if the item or system is
deactivated. For example, a vanity basin with an inoperative drain
should include a placard stating “DO NOT POUR LIQUIDS INTO
BASIN”. Make sure the placard can be easily understood by all
passengers. Consider any passengers whose primary language is not
the same as the placard’s language.
Items or systems which have external access such as a baggage door
or refueling panel should include a placard on the exterior side of the
door or on the interior side provided it is prominently in view when
accessed. The placard should include text specifying the item or
system that is inoperative and / or states limitations on aircraft
operations.
Placard text should be of appropriate size, font and color so that it
can be easily read. Placards placed on the exterior of the aircraft
should be made of materials that will not degrade or depart the
aircraft, such as aerodynamic tape and permanent marker.
Placarding does NOT satisfy the requirement to make an appropriate
entry in the discrepancy report for an inoperative or missing item or
system.
525BCOMP-01-01
vi
Regulatory References
When an item’s proviso includes language such as “any in excess of
those required by 14 CFR” or “not required by 14 CFR”, the operator
is required to replace this reference with the specific operating
requirement applicable to their operation. The following table lists 14
CFR references for certain systems. This table may include
references for items not installed on this aircraft or which MMEL relief
is not offered.
ATA
22
23
23
Item
-10-XX
-00-XX
-10-XX
23
-11-XX
23
-12-XX
Very High Frequency (VHF)
Communication System
23
23
23
23
24
25
25
25
25
25
25
25
25
25
25
25
25
25
-40-XX
-50-XX
-50-XX
-70-XX
-30-XX
-10-XX
-20-XX
-20-XX
-20-XX
-20-XX
-20-XX
-60-XX
-60-XX
-60-XX
-60-XX
-60-XX
-61-XX
-62-XX
Passenger Address (PA) System
Headsets
Microphone
Cockpit Voice Recorder
DC Generator
Passenger seat shoulder harness
Under seat restraining bars
Passenger Briefing Cards
Tables
Movie Screens (In aisle)
Observer’s Seat
Emergency Medical Kit (EMK)
First Aid Kit (FAK)
Automatic External Defibrillator (AED)
Pyrotechnic Signaling Device
Crash Axe
Flotation Device
Emergency Locator Transmitter (ELT)
(Fixed, Automatic)
525BCOMP-01-01
Title
Autopilot System
SATCOM
High Frequency (HF) Communication
System
Ultra High Frequency (UHF)
Communication System
14 CFR Reference(s)
App G
135.98, 135.165
91.511, 135.98, 135.165
91.126, 91.127,
91.129, 91.130,
91.131, 91.135,
91.205, 91.511,
135.161, 135.165
91.126, 91.127,
91.129, 91.130,
91.131, 91.135,
91.205, 91.511,
135.161, 135.165
135.150
91.511, 135.151, 135.165
91.511, 135.165
91.609, 91.1045, 135.151
135.163
91.205
91.523
91.519, 91.1035
91.535
91.535
135.75
91.513
91.205, 91.509, 135.167
91.205, 91.509, 135.167
91.207
vii
ATA
25
Item
-62-XX
25
26
30
30
30
31
31
33
33
33
33
33
33
34
34
34
34
34
34
34
34
34
34
34
34
34
-64-XX
-22-XX
-10-XX
-30-XX
-40-XX
-20-XX
-30-XX
-20-XX
-40-XX
-40-XX
-40-XX
-40-XX
-50-XX
-11-XX
-12-XX
-13-XX
-14-XX
-15-XX
-16-XX
-16-XX
-16-XX
-17-XX
-21-XX
-22-XX
-22-XX
-22-XX
Title
Emergency Locator Transmitter (ELT)
(Survival)
Life Raft
Portable Fire Extinguishers
Anti-Ice System
Pitot Heat
Windshield Wiper
Clock
Flight Data Recorder
Passenger Information Sign
Wing Illumination Lights
Anti-Collision Light System
Landing Light
Position / Navigation Lights
Flashlight
Static Pressure System
Free Air Temperature Indicator
Vertical Speed Indicator
Airspeed Indicator
Overspeed Warning
Altitude Alerter
Altimeter
Sensitive Altimeter
Altitude Measurement Systems
Gyro Pitch and Bank
Standby Attitude Indicator
Magnetic Direction Indicator
Gyro Direction Indicator
34
34
34
34
34
34
-24-XX
-24-XX
-25-XX
-31-XX
-34-XX
-42-XX
Gyro Rate of Turn
Slip-Skid Indicator
Flight Director
Instrument Landing System (ILS)
Marker Beacon
Weather Radar System
34
34
34
-44-XX
-44-XX
-45-XX
34
34
34
-46-XX
-51-XX
-52-XX
Terrain Awareness and Warning System
Radio Altimeter
Traffic Alert and Collision Avoidance
System (TCAS)
Thunderstorm Detection System
Distance Measuring Equipment (DME)
ATC Transponder and Automatic Altitude
Reporting System
525BCOMP-01-01
14 CFR Reference(s)
91.207, 91.509, 135.167
91.509, 135.167
91.513, 135.155
91.527
135.163, App A
App A
91.205
91.609, 91.1045, 135.152
91.517
91.527
91.205, 91.209, 135.159
91.205, 91.507
91.205, 91.209
91.503, 135.159
135.163, App A
135.163
135.163, App A
91.205, App A,
91.603
91.219, App G
91.205
91.205, 135.149, App A
App G
91.205, 135.159, App A
135.149
91.205, 135.159
91.609, 91.1045,
135.152, 135.159
91.205, 135.159
91.205, 135.159
App A
135.165, App A
135.165, App A
91.1045, 135.173,
135.175
91.223, 91.1045, 135.154
App A
91.221, 91.1045, 135.180
91.1045, 135.173
91.205, 135.165
91.130, 91.131, 91.135,
91.215,
viii
34
-52-XX
34
-52-XX
34
34
-52-XX
-54-XX
34
34
-55-XX
-57-XX
-60-XX
-10-XX
-20-XX
-30-XX
-20-XX
-60-XX
35
35
35
37
71
77
525BCOMP-01-01
Automatic Dependent SurveillanceBroadcast
Elementary and Enhanced Downlink
Aircraft Reportable Parameters
ADS-B Squitter Transmissions
Very High Frequency Omnirange (VOR)
System
Automatic Direction Finder (ADF)
Long-Range Navigation System
Flight Crew Oxygen System
Passenger Oxygen System
Portable Breathing Equipment (PBE)
Vacuum Indicator
Carburetor Heat
Engine Indications
91.130, 91.131, 91.135,
91.225,
135.143
91.227
91.131, 91.205, 91.511,
135.161, 135.165
91.205, 135.161
91.131, 91.205, 91.511,
135.165
91.211, 135.157
91.211, 135.157
135.163
135.149
91.205
ix
Page Intentionally Left Blank
525BCOMP-01-01
x
21-21-01-01
Evaporator Fans Forward
C/1/0
(M) May be inoperative provided:
a) Forward evaporator fan is deactivated,
b) Aft evaporator fan is operative,
c) Windshield defog fan is considered inoperative, and
d) Windshield anti-ice system is operative.
MAINTENANCE PROCEDURES
Disengage the “FWD EVAP FAN” circuit breaker and secure with tie-wrap.
21-21-01-01
Evaporator Fans AFT
B/1/0
(M) May be inoperative provided:
a) Aft evaporator fan is deactivated,
b) Fwd evaporator fan is operative, and
c) Temperature control is operated in manual mode only.
MAINTENANCE PROCEDURES
Disengage the “AFT EVAP FAN” circuit breaker and secure with tie-wrap.
21-21-02
Windshield Defog Fan
C/1/0
(O) May be inoperative provided:
a) Windshield anti-ice system is operative,
b) Glareshield fans are operative, and
c) Crew has a means to clear the windshield of moisture.
MAINTENANCE PROCEDURES
The crew may use a lent free cloth to clear the windshield of moisture.
525BCOMP-01-01
1
21-30-01-01
Emergency Pressurization System(Pressurized)
C/1/0
(O) May be inoperative provided:
a) Both left and right bleed sources are operative,
b) Emergency pressurization valve is verified closed, and
c) Aircraft is operated at FL 250 or below.
OPERATIONAL PROCEDURES
1) Move the airplane to a suitable run-up area.
2) Set parking brake.
3) Start one engine and adjust power to 75% N1.
4) Open Windshield Manual Control Valves.
CAUTION: LIMIT GROUND OPERATION OF THE WINDSHIELD BLEED AIR SYSTEM
TO FIVE SECONDS.
5)
6)
7)
8)
9)
Briefly position Windshield Anti-Ice Bleed Air switch to LOW.
Verify audible airflow to Windshield Bleed Air Nozzles.
Close Windshield Manual Control Valves.
Verify no audible air flow from Windshield Nozzles and Cockpit Air Distribution Ducts.
Position Windshield Anti-Ice Bleed Air switch to OFF.
NOTE: It may be necessary to slightly open and close the manual valves after the antiice switch is turned OFF to prevent W/S AIR O’HEAT annunciation.
10) Shut
down engine.
525BCOMP-01-01
2
21-30-01-02
Emergency Pressurization System(Unpressurized)
C/1/0
O) May be inoperative provided:
a) Emergency pressurization valve is verified closed, and
b) Cabin pressurization system is considered inoperative.
OPERATIONAL PROCEDURES
1) Move the airplane to a suitable run-up area.
2) Set parking brake.
3) Start one engine and adjust power to 75% N1.
4) Open Windshield Manual Control Valves.
CAUTION: LIMIT GROUND OPERATION OF THE WINDSHIELD BLEED AIR SYSTEM
TO FIVE SECONDS.
5)
6)
7)
8)
9)
Briefly position Windshield Anti-Ice Bleed Air switch to LOW.
Verify audible airflow to Windshield Bleed Air Nozzles.
Close Windshield Manual Control Valves.
Verify no audible air flow from Windshield Nozzles and Cockpit Air Distribution Ducts.
Position Windshield Anti-Ice Bleed Air switch to OFF.
NOTE: It may be necessary to slightly open and close the manual valves after the antiice switch is turned OFF to prevent W/S AIR O’HEAT annunciation.
10)Shut down engine.
21-30-02-01
Cabin Pressurization System(Unpressurized With Cabin Occupants)
C/1/0
(O) May be inoperative provided:
a) PRESS SYSTEM SELECT is selected to MANUAL,
b) CABIN DUMP is selected ON,
c) Aircraft is operated at 13,600 feet cabin altitude or below, and
d) Flight crew oxygen system is operative and used as required by 14 CFR.
NOTE: CABIN ALT red annunciator will illuminate and CABIN PRESSURE aural warning will
sound (voice-equipped aircraft) at 9,500 +/- 400 feet cabin altitude.
OPERATIONAL PROCEDURES
1) Flight planning must consider the fuel burn and range associated with flight at lower altitudes.
2) Minimum enroute altitudes must be taken into account for the planned route.
3) Passengers must be briefed prior to each flight that cabin pressurization will be unavailable.
Any medical complications or concerns must be considered in determination of the enroute
altitude.
4) Portable or therapeutic oxygen may be used as needed for passenger comfort.
5) Cabin pressure must be monitored throughout the flight.
525BCOMP-01-01
3
21-30-02-02
Cabin Pressurization System(Unpressurized Without Cabin Occupants)
C/1/0
(M) (O) May be inoperative provided:
a) Emergency pressurization system is deactivated,
b) PRESS SYSTEM SELECT is selected to MANUAL,
c) CABIN DUMP is selected ON,
d) OXYGEN CONTROL VALVE is selected to CREW ONLY,
e) No cabin occupants are carried,
f) Aircraft is operated at FL250 or below, and
g) Flight crew oxygen system is operative and used as required by 14 CFR.
NOTE: CABIN ALT red annunciator will illuminate and CABIN PRESSURE aural warning will
sound (voice-equipped aircraft) at 9,500 +/- 400 feet cabin altitude.
MAINTENANCE PROCEDURES
Disengage and secure NORM PRESS circuit breaker located on the pilots circuit breaker panel.
OPERATIONAL PROCEDURES
1) Flight planning must consider the fuel burn and range associated with flight at lower altitudes.
2) Minimum enroute altitudes must be taken into account for the planned route.
3) Cabin pressure must be monitored throughout the flight.
21-32-01-01
Cabin Altitude/Differential Pressure Gauge Cabin Differential Pressure
Indication
C/1/0
(O) May be inoperative provided:
a) Cabin altitude indication is operative,
b) Cabin pressurization auto schedule is operative and used, and
c) A chart is provided and used to convert cabin and aircraft altitude to differential pressure.
OPERATIONAL PROCEDURES
Use the chart in Appendix A to convert cabin and aircraft altitude to differential pressure.
21-32-01-02
Cabin Altitude/Differential Pressure Gauge Cabin Altitude Indication
C/1/0
(O) May be inoperative provided:
a) Cabin differential pressure is operative,
b) Cabin pressurization auto schedule is operative and used, and
c) A chart is provided and used to convert cabin and aircraft altitude to differential pressure.
OPERATIONAL PROCEDURES
Use the chart in Appendix A to convert differential pressure and aircraft altitude to cabin altitude.
525BCOMP-01-01
4
21-33-00
Cabin Outflow Valve
C/2/0
(M) May be inoperative provided:
a) One outflow valve is removed, and
b) Cabin pressurization system is considered inoperative.
MAINTENANCE PROCEDURES
1) Remove one outflow valve. Refer to the 525B Maintenance Manual Chapter 21, Outflow
Valve – Removal/Installation.
2) Bag and stow any loose connectors.
21-33-02-01
Pressure Regulating Shutoff Valves(Pressurized)
C/2/1
(M) One may be inoperative provided:
a) Affected valve is secured for no flow,
b) AIR SOURCE SELECT is selected to operative side,
c) All other components and functions of the pressurization system operate normally, and
d) Aircraft is operated at FL250 or below.
MAINTENANCE PROCEDURES
Install a Blocking Plate on the Pressure Regulating Shutoff Valves.
1) Fabricate a 0.020 inch (0.51 mm) thick blocking plate from Type 301, 1/2-hard stainless steel
of the applicable diameter.
2) Disconnect the bleed air tube upstream from the regulating shutoff valve. Refer to 525B
Maintenance Manual.
3) Install the blocking plate on the shutoff valve, between the valve and the bleed air tube.
4) Connect the bleed air tube to the unserviceable regulating shutoff valve. Refer to 525B
Maintenance Manual.
525BCOMP-01-01
5
21-33-02-01
Pressure Regulating Shutoff Valves(Unpressurized)
C/2/0
(M) May be inoperative provided:
a) Both valves are secured for no flow, and
b) Cabin pressurization system is considered inoperative.
MAINTENANCE PROCEDURES
Install a Blocking Plate on the Pressure Regulating Shutoff Valves.
1) Fabricate a 0.020 inch (0.51 mm) thick blocking plate from Type 301, 1/2-hard stainless steel
of the applicable diameter.
2) Disconnect the bleed air tube upstream from the regulating shutoff valves. Refer to 525B
Maintenance Manual.
3) Install the blocking plate on the shutoff valves, between the valves and the bleed air tubes.
4) Connect the bleed air tubes to the unserviceable regulating shutoff valves. Refer to 525B
Maintenance Manual.
21-50-01
Air Conditioning System
C/1/0
(M) May be inoperative provided:
a) Air conditioning system is deactivated,
b) Windshield defog fan is considered inoperative, and
c) Cabin temperature control system is operated in manual mode.
MAINTENANCE PROCEDURES
1. Access the right-hand junction box in the tailcone.
2. Remove the VCCS (HZ028) fuse limiter.
525BCOMP-01-01
6
22-10-01
Autopilot System
B/1/0
(M) May be inoperative provided:
a) Autopilot system is deactivated,
b) Enroute procedures and approach minimums do not require use of autopilot system,
c) Cabin pressurization system is not operated in manual mode,
d) Aircraft is not operated RVSM,
e) Aircraft is not operated single-pilot, and
f) Yaw damper is considered inoperative.
MAINTENANCE PROCEDURES
1). Electrically isolate all three Autopilot Servos:
a) Select BATTERY and AVIONICS POWER switches to OFF.
b) Gain access to the Elevator Autopilot Servo (PSV-P1) and Rudder Autopilot Servo (YSVP1) in the tailcone by opening aft tailcone access panels 322CL, 321CC, and 321BL,
located at the aft end of the tailcone baggage compartment. Refer to Chapter 6, Access
Plates and Panels Identification - Description and Operation.
c) Disconnect electrical connector (PT304) from the Elevator Autopilot Servo (PSV-P1), and
the electrical connector (PT305) from the Rudder Autopilot Servo (YSV-P1). Bag and
secure the connectors away from all control cables. The servos are located on the forward
side of the vertical stabilizer canted spar.
d) Gain access to the Aileron Autopilot Servo (RSV-P1) in the tailcone by removing Panel
321A, located on the left side of the forward closeout in the tailcone baggage
compartment. This large panel provides access to the tailcone systems area. Refer to
Chapter 6, Access Plates and Panels Identification - Description and Operation.
e) Disconnect electrical connector (PT303) from the Aileron Autopilot Servo (RSV-P1). The
servo is located approximately 6 inches aft of the bottom of the Aft Pressure Bulkhead and
to the left of the aileron sector in the center of the service bay. Bag and secure the
connector away from control cables.
f) Re-install Panels 321A and 321BL.
2). Operate the control yoke and the rudder pedals through full control travel in all 3 axes to
ensure that autopilot clutches are disengaged, and travel is unobstructed.
525BCOMP-01-01
7
22-10-02
Yaw Damper
C/1/0
(M) May be inoperative provided:
a) Autopilot must be considered inoperative, and
b) Aircraft is operated at FL300 or below.
MAINTENANCE PROCEDURES
1). Electrically isolate the Rudder Servo:
a) Select BATTERY and AVIONICS POWER switches to OFF.
b) Gain access to the Rudder Autopilot Servo (YSV-P1) in the tailcone by opening the
opening the aft tailcone access panels 322CL, 321CC, and 321BL, located at the aft end
of the tailcone baggage compartment. Refer to Chapter 6, Access Plates and Panels
Identification - Description and Operation.
c) Disconnect the electrical connector (PT305) from Rudder Autopilot Servo (YSV-P1). The
servo is located on the forward side of the vertical stabilizer canted spar. Bag and secure
the connector away from all control cables.
d) Close Panel 321BL.
2). Check operation of flight controls for freedom of movement and smoothness through
complete range of travel.
525BCOMP-01-01
8
23-10-01-02
High Frequency (HF) Communications System
C/-/1
(O) May be inoperative while conducting operations that require two LRCS provided:
a) SATCOM voice or data link operates normally,
b) Alternate procedures are established and used,
c) SATCOM voice coverage is available over the intended route of flight, and
d) If SATCOM Voice is to be used over the intended route of flight, SATCOM Voice short
codes (INMARSAT) or direct dial commercial numbers (IRIDIUM) must be available. If
not available, prior coordination with appropriate ATS (FIR) facility is required.
NOTE: SATCOM Voice is to be used only as a backup to normal HF communications.
OPERATIONAL PROCEDURES
1). Prior to each flight a crewmember will use the SATCOM Data Link to transmit and receive
information to ensure that the system is operational.
2). Prior to each flight a crewmember will review the SATCOM system User’s Guide or Manual
to ensure that coverage exists for the intended route of flight.
23-10-01-03
High Frequency (HF) Communications System Wire Antenna
C/1/0
(M) May be inoperative provided:
a) Horizontal and vertical stabilizers are inspected for damage,
b) Any remaining portion of the antenna is removed, and
c) High Frequency (HF) communication system is considered inoperative.
MAINTENANCE PROCEDURES
1) If the antenna came lose in flight, inspect the aircraft for damage. If damage is found, contact
Cessna Customer Support Structures Team for aircraft evaluation.
2) Remove the HF Antenna. Refer to 525B Maintenance Manual, Chapter 23 for the appropriate
HF installation.
3) Bag and stow any loose connectors.
4) Cover any openings in the fuselage with aerodynamic tape.
23-20-03-02
Datalink (Including Satellite Radio and Weather)
C/-/0
(O) May be inoperative provided alternate procedures are established and used.
NOTE: Any function or weather product which operates normally may be used.
OPERATIONAL PROCEDURES
Crew shall use other available means to obtain weather information such as HIWAS or
FLIGHTWATCH as well as radar.
525BCOMP-01-01
9
***23-40-02
Passenger Briefing System
D/1/0
(M) May be inoperative provided:
a) Passenger briefing system is deactivated, and
b) Cabin occupants are briefed by alternate means.
MAINTENANCE PROCEDURES
1) Pull and secure the CABIN BRIEFER circuit breaker on the CO-pilot’s circuit breaker
panel.
2) A crew member will use the PA system or turn and face the cabin occupants to make
appropriate announcements.
23-40-03
Passenger Belt/Safety Chime
C/1/0
(O) May be inoperative provided alternate procedures are established to brief cabin occupants.
OPERATIONAL PROCEDURES
A crew member must use the PA system or turn and face the passengers from the cockpit to
make the appropriate announcements.
23-50-05-02
Held Microphone Holder
D/-/0
(O) May be inoperative provided associated hand microphone is secured by another means.
OPERATIONAL PROCEDURES
Crew must secure the microphone with alternate means( i.e. Velcro, tie wraps, etc)
525BCOMP-01-01
10
***24-50-01-01
AC Cockpit Outlet
C/-/0
(O) May be inoperative provided alternate procedures are established and used.
OPERATIONAL PROCEDURES
1) If equipment utilizing the affected power source is battery operated, make sure that
adequate battery life is available and backup batteries for intended operating times are
available.
2) Use alternate cockpit/cabin power source if power source is available and within close
proximity.
25-00-01
Required Documents Holder (Airworthiness Certificate, Registration, Etc.)
D/1/0
(O) May be missing or inoperative provided an alternate means of securing and displaying
documents is used.
OPERATIONAL PROCEDURES
Place the required documents in a clear plastic bag and display them in a manner that is visible
to the appropriate authorities, crew members and passengers.
25-10-01-01-20
Flight Crew Seat (per seat) Armrest
C/1/0
(M) May be inoperative provided affected armrest is removed.
MAINTENANCE PROCEDURES
Using the appropriate seat manual, remove and store the affected armrest(s).
NOTE: Refer to the appropriate Cessna Maintenance Manual and/or seat manual for information
of the individual aircraft installation.
525BCOMP-01-01
11
25-10-01-03
Flight Crew Seat (per seat) Recline/Tilt Function
C/1/0
(M)(O) May be inoperative provided:
a) Affected seat is secured in a position that permits normal visibility,
b) Full flight control movement is available, and
c) Crewmember can reach all necessary controls and equipment while restrained.
MAINTENANCE PROCEDURES
Using the appropriate seat manual, secure the seat in the desired position.
NOTE: Refer to the appropriate Cessna Maintenance Manual and/or seat manual for information
of the individual aircraft installation.
OPERATIONAL PROCEDURES
1) Prior to flight, a crew member shall occupy the affected seat and fasten the restraining
system.
2) Make sure full flight control movement and brake application are available.
3) Make sure all necessary controls and equipment can be reached while restrained.
25-10-01-05
Flight Crew Seat (per seat) Vertical Adjustment
C/1/0
(M)(O) May be inoperative provided:
a) Affected seat is secured in a position that permits normal visibility,
b) Full flight control movement is available, and
c) Crewmember can reach all necessary controls and equipment while restrained.
MAINTENANCE PROCEDURES
Using the appropriate seat manual, secure the seat in the desired position.
NOTE: Refer to the appropriate Cessna Maintenance Manual and/or seat manual for information
of the individual aircraft installation.
OPERATIONAL PROCEDURES
1) Prior to flight, a crew member shall occupy the affected seat and fasten the restraining
system.
2) Make sure full flight control movement and brake application are available.
3) Make sure all necessary controls and equipment can be reached while restrained.
525BCOMP-01-01
12
25-10-02
Pilot or Copilot Eye Locator Reference Ball
C/3/0
(O) May be inoperative or missing provided alternate procedures are developed and used for
eye position reference.
OPERATIONAL PROCEDURES
1) Prior to flight, a crew member shall occupy the affected seat and fasten the restraining
system to ensure the following conditions are met:
(a) Make sure full flight control movement and brake application.
(b) Make sure access to all necessary controls and equipment.
2) Position the affected seat(s) so the pilot align the eyeball locator bracket so that the following
sight picture with the bracket is achieved:
(a) Eyeball locator base is flat.
(b) The flange opposite to the affected seat is aligned for a straight edge.
25-20-01-01
Passenger Seat(Including Side Facing Seat) (Per Seat) Armrest
D/-/0
(M) May be inoperative or missing and seat occupied provided:
a) Armrest does not block an emergency exit,
b) Armrest does not restrict any passenger from access to the aisle, and
c) If armrest is missing, seat is secured in full upright position.
MAINTENANCE PROCEDURES
If the armrest is missing, use the appropriate seat manual and secure the seat in the full upright
position.
NOTE: Refer to the appropriate Cessna Maintenance Manual and/or Interiors Manual for
information of the individual aircraft installation.
25-20-01-02-10
Passenger Seat(Including Side Facing Seat) (Per Seat) Seat Controls
(includes recline, headrest, footrest, floor tracking, pedestal tracking,
swivel and other positioning controls)
D/-/0
(M) May be inoperative and seat occupied provided seat is secured in taxi, takeoff and landing
position.
MAINTENANCE PROCEDURES
Using the appropriate seat manual, secure the seat in the full upright position.
NOTE: Refer to the appropriate Cessna Maintenance Manual and/or Interiors Manual for
information of the individual aircraft installation.
525BCOMP-01-01
13
25-20-02-01
Refreshment Center Hot Liquid Storage System Heater
C/-/0
(M) May be inoperative provided system is deactivated.
MAINTENANCE PROCEDURES
1) Access the appropriate junction box.
2) Pull and secure the appropriate circuit breaker.
NOTE: Refer to the appropriate Interiors Manual for information of the individual aircraft
installation.
25-20-02-02
Refreshment Center Drain System
C/-/0
(O) May be inoperative provided:
a) Refreshment center drain heater is considered inoperative,
b) Any excess liquid is removed from the ice drawer prior to each flight,
c) Ice drawer drain valve is closed prior to flight, and
d) Hot liquid storage tank is empty
OPERATIONAL PROCEDURES
Prior to each flight a member of the flightcrew must ensure:
1) All excess liquid is removed from the ice drawer.
2) Ice drawer drain valve is closed.
3) Hot liquid storage tank is empty.
525BCOMP-01-01
14
25-30-01-02
Cabin Storage Compartment
C/-/0
(O)May be inoperative provided:
a) Procedures are established and used to secure compartment closed,
b) Affected compartment is not used for storage of any item except for those permanently
affixed,
c) Any emergency equipment located in affected compartment is considered inoperative,
and
d) Affected compartment is prominently placarded “DO NOT USE”.
OPERATIONAL PROCEDURES
Secure the Cabin Storage Compartment Door.
1) Put the cabin storage compartment door in the closed position.
2) Carefully attach sufficient lengths of 3M vinyl tape (or equivalent) across the door opening at
a 90-degree angle to make sure that the door does not open during airplane operation.
CAUTION: Do not use duct tape or other tapes that can contain substances known to cause
damage to the furniture finish or leave residues.
25-30-01-03
Cabin Storage Compartment
C/-/0
(M) (O) May be inoperative provided:
a) Affected door is removed,
b) Affected compartment is not used for storage of any item, except those permanently
affixed,
c) Cabin occupants are briefed that affected compartment may not be used, and
d) Affected compartment is prominently placarded “DO NOT USE”.
NOTE: Any permanently affixed emergency equipment located in the affected compartment is
available for use.
MAINTENANCE PROCEDURES
Remove the Cabin Storage Compartment Door.
NOTE: Refer to the Model 525B Interior Maintenance Manual and Illustrated Parts Catalog.
OPERATIONAL PROCEDURES
Brief cabin occupants that affected cabinet is not to be used.
525BCOMP-01-01
15
25-30-01-04
Cabin Storage Compartment Individual Shelves
D/-/0
(O) May be inoperative or missing provided:
a) Any emergency equipment located on the affected shelf is relocated to another
compartment and placarded, and
b) Cabin occupants are briefed on status of relocated items.
OPERATIONAL PROCEDURES
1) Make sure all equipment located on affected shelf has been relocated and is available for
use.
2) Brief cabin occupants on location of relocated equipment.
25-62-01-02-30
Emergency Locator Transmitter (ELT) Fixed ELTs
D/-/(M) Any in excess of those required by 14 CFR may be inoperative provided system is
deactivated.
MAINTENANCE PROCEDURES
Isolate the ELT Antenna.
1) Disconnect the ELT antenna coaxial connector adapter from the ELT antenna. Refer to
525B Maintenance Manual Chapter 25 Emergency Locator Transmitter (ELT) Maintenance Practices for the applicable ELT.
2) Put protective covers on the coaxial connector plug and jack.
3) Stow the coaxial cable.
25-62-01-02-40
Emergency Locator Transmitter (ELT) Fixed ELTs
A/-/0
(M) May be inoperative provided:
a) System is deactivated, and
b) Repairs are made within 90 days.
MAINTENANCE PROCEDURES
Isolate the ELT Antenna.
1) Disconnect the ELT antenna coaxial connector adapter from the ELT antenna. Refer to
525B Maintenance Manual Chapter 25 Emergency Locator Transmitter (ELT) Maintenance Practices for the applicable ELT.
2) Put protective covers on the coaxial connector plug and jack.
3) Stow the coaxial cable.
525BCOMP-01-01
16
27-20-01
Rudder Pedal Adjustment
B/4/2
(M) (O) May be inoperative provided:
a) Two pedal adjustments are not inoperative at the same pilot station,
b) Affected pedal is positioned in a detent and adjustment mechanism is secured from
movement,
c) Unaffected pedal is adjusted to match affected pedal, and
d) Pilot with affected pedal verifies full control movement and brake application is available
while restrained, prior to each flight.
MAINTENANCE PROCEDURES
Match the Position and Secure the Rudder Pedals.
1) Set and secure the rudder pedal with the unserviceable adjustment mechanism in a detent
position.
2) Set and secure the rudder pedal with the serviceable adjustment mechanism in the same
detent position.
3) Operate the rudder pedals through their full range of motion to make sure that there is full
rudder control movement and brake application.
OPERATIONAL PROCEDURES
1) Prior to flight, a crew member shall occupy the affected seat and fasten the restraining
system.
2) Make sure full flight control movement and brake application are available.
525BCOMP-01-01
17
27-31-01
Electric Elevator Trim
B/1/0
(M) (O) May be inoperative provided:
a) Electric trim system is deactivated,
b) Manual trim operation is verified normal, and
c) Autopilot system is considered inoperative.
MAINTENANCE PROCEDURES
Deactivate the electric elevator trim system and check for proper manual trim operation.
1) Pull and secure the PITCH TRIM circuit breaker on the pilot’s circuit breaker panel.
2) Exercise the pitch trim using the manual trim wheel from stop to stop. Visually verify trim
tab movement and direction matches trim wheel input.
3) Pitch trim should be checked for full travel, smoothness, and proper operation.
NOTE: If the electric trim is inoperative, it should be confirmed the problem is not in the
mechanical trim system and the failure does not affect manual trim.
OPERATIONAL PROCEDURES
1) The flightcrew must exercise the pitch trim using the manual trim wheel from stop to stop.
2) Visually verify trim tab movement and direction matches trim wheel input.
27-70-01
Control Lock System
C/1/0
(O) May be inoperative in the unlocked position provided full flight control and throttle movement
is available.
OPERATIONAL PROCEDURES
During the flight control check in the Before Taxi checklist, verify both throttles can be moved
freely.
525BCOMP-01-01
18
28-41-01
Fuel Quantity Indication
A/2/1
(O) One may be inoperative provided:
a) Both fuel low level indicating systems and both fuel flow indicating systems are operative,
b) Fuel required for the route to be flown is increased by 10%,
c) Flight is restricted to a maximum of three hours, remaining within one hour of a suitable
airport at all points along the route,
d) Both fuel tanks are fueled over-wing to a known, balanced quantity,
e) Fuel use is tracked,
f) If autopilot is used, it is disconnected every twenty minutes to detect possible lateral fuel
imbalance, monitor amber “A” mistrim PFD annunciation, and
g) Repairs are made within three flight cycles.
OPERATIONAL PROCEDURES
1) During preflight planning, increase the fuel required for the route to be flown by 10%. Also
plan the route so that the flight will last no longer than three hours while remaining within one
hour of a suitable airport at all points.
2) To achieve a known quantity in the affected tank, the tank may be emptied using defueling
procedures or sumped then fueled to a known quantity. It may be completely fueled, or fuel
may be transferred out of the tank until it is empty.
3) To track fuel use, operators may use a fuel log or develop their own procedure. This can
include matched fuel flow techniques, use of the FMS fuel quantity system or other means.
4) During flight, disconnect the autopilot every twenty minutes. Make sure a crew member has
control of the aircraft prior to disconnecting the autopilot. Check for any abnormal roll
tendencies. Check for roll trim required.
28-41-02
Fuel Low Level Indicating System
A/2/1
(O) One may be inoperative provided:
a) Procedures for monitoring fuel quantity are established and used,
b) Both fuel quantity indicating systems are operative, and
c) Repairs are made within three flight days.
OPERATIONAL PROCEDURES
1) Flight crew shall brief the loss of low fuel quantity warning system on the affected side.
2) Flight crew shall monitor fuel balance during flight to make sure adequate fuel remains in
both wing fuel tanks for planned mission.
525BCOMP-01-01
19
30-10-01
Wing Bleed Air Anti Ice System
C/2/0
(M) One may be inoperative provided:
a) Both wing valves are secured for no flow,
b) Both WING/ENG ANTI-ICE switches are selected OFF or ENG ON, and
c) Aircraft is not operated in known, forecast, or AFM-defined icing conditions.
MAINTENANCE PROCEDURES
Install a Blocking Plate on the Unserviceable Wing Anti-Ice Pressure-Regulating Shutoff Valve.
NOTE: The blocking plate installation on the left and the right wing anti-ice pressure-regulating
shutoff valves is typical.
1) Fabricate a 0.020 inch (0.51 mm) thick blocking plate from Type 301, 1/2-hard stainless steel
of the applicable diameter.
2) Disconnect the bleed air tube upstream from the wing anti-ice pressure-regulating shutoff
valve. Refer to 525B Maintenance Manual Chapter 30, Airfoil Anti-Ice System - Maintenance
Practices.
3) Install the blocking plate on the wing anti-ice pressure-regulating shutoff valve, between the
valve and the bleed air tube.
4) Connect the bleed air tube to the wing anti-ice pressure-regulating shutoff valve. Refer to
525B Maintenance Manual Chapter 30, Airfoil Anti-Ice System - Maintenance Practices.
30-10-02
Pneumatic Tail De-Ice System(Automatic or Manual Mode)(Failure to Inflate)
B/1/0
(M) May be inoperative provided:
a) All de-ice boots must be verified to be deflated and held down when service air system is
active,
b) TAIL switch is selected OFF, and
c) Aircraft is not operated in known, forecast, or AFM-defined icing conditions.
MAINTENANCE PROCEDURE
1) Start at least one engine and select the associated bleed air source on.
2) Verify the de-ice boots on both horizontal stabilizers are being held down to the contour of
the leading edges.
525BCOMP-01-01
20
30-20-01
Engine Anti-Ice System
A/2/1
(M) One may be inoperative provided:
a) Affected engine anti-ice is secured for no flow,
b) Aircraft is not operated in known, forecast, or AFM-defined icing conditions, and
c) Repairs are made within three flight days.
MAINTENANCE PROCEDURES
Install a Blocking Plate on the Unserviceable Engine Air Inlet Anti-Ice Pressure-Regulating
Shutoff Valve.
NOTE: The blocking plate installation on the left and the right engine air inlet anti-ice pressureregulating shutoff valves is typical.
1) Fabricate a 0.020 inch (0.51 mm) thick blocking plate from Type 301, 1/2-hard stainless steel
of the applicable diameter.
2) Disconnect the bleed air tube upstream from the unserviceable engine air inlet anti-ice
pressure-regulating shutoff valve. Refer to 525B Maintenance Manual Chapter 30, Engine
Inlet Anti-Ice - Maintenance Practices.
3) Install the blocking plate on the unserviceable engine air inlet anti-ice pressure-regulating
shutoff valve, between the valve and the bleed air tube.
4) Connect the bleed air tube to the unserviceable engine air inlet anti-ice pressure-regulating
shutoff valve. Refer to 525B Maintenance Manual Chapter 30, Engine Inlet Anti-Ice Maintenance Practices.
30-40-01
Windshield Bleed Air Anti-Ice System
C/1/0
(M) May be inoperative provided:
a) Windshield anti-ice is secured for no flow at windshield bleed-air control valve,
b) Emergency pressurization system is considered inoperative, and
c) Aircraft is not operated in known, forecast, or AFM-defined icing conditions.
MAINTENANCE PROCEDURES
Install a Blocking Plate on the Windshield Bleed Air Anti-Ice Control Valve.
1) Fabricate a 0.020 inch (0.51 mm) thick blocking plate from Type 301, 1/2-hard stainless steel
of the applicable diameter.
2) Disconnect the bleed air tube upstream from the bleed air control valve. Refer to 525B
Maintenance Manual Chapter 30, Windshield Anti-Ice - Maintenance Practices.
3) Install the blocking plate on the bleed air control valve, between the valve and the bleed air
tube.
4) Connect the bleed air tube to the unserviceable control valve. Refer to 525B Maintenance
Manual Chapter 30, Windshield Anti-Ice - Maintenance Practices.
525BCOMP-01-01
21
30-70-01
Drain System Heater
C/-/0
(M) (O) May be inoperative provided:
a) Drain heater is deactivated,
b) Any excess liquid is removed from the ice drawer prior to each flight,
c) Ice drawer drain valve is closed prior to flight,
d) Hot liquid storage tank is empty,
e) Lavatory relief tube drain is considered inoperative, and
f) Hot liquid overfill drain is placarded “DRAIN HEAT INOP, DO NOT USE”.
MAINTENANCE PROCEDURES
Disengage the TOILET/DRAIN HEATERS circuit breaker, installed on the aft circuit breaker
panel.
OPERATIONAL PROCEDURES
Prior to each flight a flight crew member must:
1) Remove any excess liquid from the ice drawer.
2) Ensure the ice drawer drain valve is closed.
3) Ensure the hot liquid storage tank is empty.
525BCOMP-01-01
22
31-20-02
Flight Hour Meter
C/1/0
(O) May be inoperative provided flight time is tracked by alternate means.
OPERATIONAL PROCEDURES
1) Record Zulu time of takeoff and landing.
2) Log elapsed time in aircraft logbook after each flight.
3) Once the flight hour meter is repaired, place a placard next to the hour meter showing the
additional time accumulated while inoperative (e.g. “+ 14.2 hours”).
31-50-05
DOOR SEAL Annunciator (Failure to Illuminate or Extinguish)
B/1/0
(O) May be inoperative
a) Door seal inflation is verified prior to each flight, and
b) Aircraft is operated at FL 250 or below.
OPERATIONAL PROCEDURES
After engine start the flight must verify the door seal is inflated prior to each flight.
33-10-04-02
Windshield Ice Detect Light System(Single light failed)
C/2/1
(O) One may be inoperative provided alternate procedures are established and used to monitor
ice accretion.
OPERATIONAL PROCEDURES
The flight crew member with the operative light must be assigned responsibility for monitoring
the windshield for ice accumulation and alerted the other flight crew member.
525BCOMP-01-01
23
33-20-01-01
Cabin Interior Lighting (Excludes Emergency Lighting System, and Dropped
Aisle Lights) (With cabin occupants)
C/-/(O) Individual lights may be inoperative for night operation provided:
a) Sufficient lighting is operative for crew to perform required duties,
b) Cabin emergency lighting is verified operative prior to each flight, and
c) Sufficient lighting is operative for carrying cabin occupants at night.
OPERATIONAL PROCEDURES
During the Cockpit/Cabin Inspection – Emergency Lights check, verify the following lights
illuminate:
a) A reading light,
b) Main door exit sign,
c) Emergency hatch exit sign light,
d) Two over wing lights, and
e) Dropped aisle lights (if installed)
33-20-01-02
Cabin Interior Lighting (Excludes Emergency Lighting System, and Dropped
Aisle Lights) (Day with cabin occupants)
C/-/0
(O) May be inoperative provided:
a) Cabin emergency lighting is verified operative prior to each flight, and
b) Aircraft is not operated at night.
OPERATIONAL PROCEDURES
During the Cockpit/Cabin Inspection – Emergency Lights check, verify the following lights
illuminate:
a) A reading light,
b) Main door exit sign,
c) Emergency hatch exit sign light,
d) Two over wing lights, and
e) Dropped aisle lights (if installed)
525BCOMP-01-01
24
33-20-01-03
Cabin Interior Lighting (Excludes Emergency Lighting System, and Dropped
Aisle Lights) (Without cabin occupants)
C/-/0
(O) May be inoperative provided:
a) Cabin emergency lighting is verified operative prior to each flight, and
b) No cabin occupants are carried.
OPERATIONAL PROCEDURES
During the Cockpit/Cabin Inspection – Emergency Lights check, verify the following lights
illuminate:
a) A reading light,
b) Main door exit sign,
c) Emergency hatch exit sign light,
d) Two over wing lights, and
e) Dropped aisle lights (if installed)
33-20-03-01
Lighted Passenger Information Sign(Excludes Cabin Emergency Lighting
System) (With cabin occupants)
C/-/0
(O) May be inoperative provided:
a) Alternate procedures are established and used to notify cabin occupants, and
b) Sign is not required by 14 CFR.
OPERATIONAL PROCEDURES
A crew member will use the PA system or turn and face the cabin occupants to make
appropriate announcements.
33-40-04-03
Landing/Taxi/Recognition Light System(LANDING/TAXI/RECOG)
Recognition / Taxi Mode
C/1/0
(O) May be inoperative provided at least one landing light is verified operative for night
operations.
OPERATIONAL PROCEDURES
During the Preliminary Exterior Inspection, verify at least one landing light is operative.
525BCOMP-01-01
25
***33-40-07
Pulse Light System
D/1/0
(O) May be inoperative provided at least one landing light is verified operative for night
operations.
OPERATIONAL PROCEDURES
During the Preliminary Exterior Inspection, verify at least one landing light is operative.
525BCOMP-01-01
26
34-44-02
Altitude Alerting System
A/-/0
(O) May be inoperative provided:
a) Altitude pre-select function is operative,
b) Aircraft is not operated RVSM,
c) Airplane does not depart from a designated airport (as listed in the operator’s MEL)
where repair or replacement can be made, and
d) Repairs are made within three flight days.
OPERATIONAL PROCEDURES
1) Crew briefings must include a reminder that the Altitude Alerting System is inoperative.
2) The flight crew will use aural callouts pertaining to approach target altitudes as assigned by
ATC or depicted on approach charts.
34-44-03-01
Terrain Awareness And Warning System (TAWS) Class B TAWS Equipment
Required Ground Proximity Warning System (GPWS)
A/1/0
(O) May be inoperative provided:
a) Alternate procedures are established and used, and
b) Repairs are made within two flight days.
OPERATIONAL PROCEDURES
Crew briefings must include aural callouts through use of appropriate aircraft equipment to
ensure obstacle and terrain clearance.
34-44-03-01-10
Terrain Awareness And Warning System (TAWS) Class B TAWS
Equipment Required Ground Proximity Warning System (GPWS) Modes
1&3
A/2/0
(O) May be inoperative provided:
a) Alternate procedures are established and used, and
b) Repairs are made within two flight days.
OPERATIONAL PROCEDURES
Crew briefings must include aural callouts through use of appropriate aircraft equipment to
ensure obstacle and terrain clearance.
525BCOMP-01-01
27
34-44-03-01-40
Terrain Awareness And Warning System (TAWS) Class B TAWS
Equipment Required Ground Proximity Warning System (GPWS)
Advisory Callouts (Mode 6)
B/-/0
(O) May be inoperative provided alternate procedures are established and used.
OPERATIONAL PROCEDURES
Crew briefings must include aural callouts during approach through the use of appropriate
aircraft equipment to ensure obstacle and terrain clearance. Briefing must include a procedure
for a crew member to call out 500 feet above airport elevation.
34-44-03-01-45
Terrain Awareness And Warning System (TAWS) Class B TAWS
Equipment Required Ground Proximity Warning System (GPWS)
Advisory Callouts (Mode 6)
C/-/0
(O) May be inoperative provided:
a) Advisory callouts not required by 14 CFR, and
b) Alternate procedures are established and used.
OPERATIONAL PROCEDURES
Crew briefings must include aural callouts during approach through the use of appropriate
aircraft equipment to ensure obstacle and terrain clearance. Briefing must include a procedure
for a crew member to call out 500 feet above airport elevation.
***34-44-03-01-50 Terrain Awareness And Warning System (TAWS) Class B TAWS
Equipment Required Ground Proximity Warning System (GPWS)
Windshear Mode (Reactive)
C/1/0
(O) May be inoperative provided alternate procedures are established and used.
OPERATIONAL PROCEDURES
Crew briefings must include escape procedures for a windshear encounter and alternate
methods used for monitoring for windshear encounters.
525BCOMP-01-01
28
34-45-01-01-10
Traffic Alert And Collision Avoidance System TCAS I
B/-/0
(M) (O) May be inoperative provided:
a) System is deactivated and secured, and
b) Enroute or approach procedures do not require its use.
MAINTENANCE PROCEDURES
Pull and secure the TCAS circuit breaker on the copilot’s circuit breaker panel.
OPERATIONAL PROCEDURES
Flight crew will select STBY for TCAS in the control page of the RTU.
34-45-01-01-20
Traffic Alert And Collision Avoidance System TCAS I
C/-/0
(M) (O) May be inoperative provided:
a) Not required by 14 CFR,
b) System is deactivated and secured, and
c) Enroute or approach procedures do not require its use.
MAINTENANCE PROCEDURES
Pull and secure the TCAS circuit breaker on the copilot’s circuit breaker panel.
OPERATIONAL PROCEDURES
Flight crew will select STBY for TCAS in the control page of the RTU.
34-45-01-02-10
Traffic Alert And Collision Avoidance System TCAS II
B/-/0
(M) May be inoperative provided:
a) System is deactivated and secured, and
b) Enroute procedures do not require its use.
MAINTENANCE PROCEDURES
Pull and secure the TCAS circuit breaker on the copilot’s circuit breaker panel.
525BCOMP-01-01
29
34-45-01-02-20
Traffic Alert And Collision Avoidance System TCAS II
C/-/0
(M) May be inoperative provided:
a) Not required by 14 CFR,
b) System is deactivated and secured, and
c) Enroute or approach procedures do not require its use.
MAINTENANCE PROCEDURES
Pull and secure the TCAS circuit breaker on the copilot’s circuit breaker panel.
34-45-01-02-50
Traffic Alert And Collision Avoidance System TCAS II
C/-/0
(O) May be inoperative provided:
a) Traffic Alert (TA) visual display and audio functions are operative,
b) TA only mode is selected by the crew, and
c) Enroute or approach procedures do not require its use.
OPERATIONAL PROCEDURES
During the Before Taxi Avionics check, verify the MFD shows a Traffic Alert along with the aural
warning when the TCAS is tested.
34-45-01-02-60
Traffic Alert And Collision Avoidance System TCAS II Traffic Alert
Display System
C/-/0
(O) May be inoperative provided:
a) RA visual display and audio functions are operative, and
b) Enroute or approach procedures do not require its use.
OPERATIONAL PROCEDURES
During the Before Taxi Avionics check, verify the PFD shows a Resolution Advisory along with
the aural warning when the TCAS is tested.
525BCOMP-01-01
30
34-61-01
Navigation Database
C/-/0
(O) May be out of currency provided:
a) Current aeronautical charts are used to verify navigation fixes prior to each flight,
b) Procedures are established and used to verify status and suitability of navigation facilities
used to define route of flight, and
c) Approach navigation radios are manually tuned and identified.
OPERATIONAL PROCEDURES
The navigation database can only be used for enroute and terminal navigation when out of
currency. Before using the FMS to navigate to a facility, verify the status, identifier, frequency
and lat/long position with an alternate, current source of information. Refer to the applicable
Airplane Flight Manual supplement for additional information.
525BCOMP-01-01
31
35-00-01
Oxygen Tank Fill Port
C/1/0
(M) May be inoperative provided bottle is filled using alternate means when service is required.
MAINTENANCE PROCEDURES
Do the Servicing of the Oxygen Cylinder at the Pressure Regulator.
1) Open the right nose baggage door to gain access to cylinder and pressure regulator.
2) Remove access panels 212AZ, 212CZ, and 212DZ to get access to the oxygen cylinder.
Refer to 525B Maintenance Manual Chapter 6, Access Plates and Panels Identification Description and Operation.
3) Remove and discard the safety wire from the pressure regulator.
4) Move the pressure regulator knob to the OFF position.
5) Disconnect the fill line assembly from the pressure regulator. Refer to 525 Maintenance
Manual Chapter 35 Crew Oxygen System - Maintenance Practices.
(a) Use dry nitrogen air to purge the oxygen from the fill line assembly.
6) Connect the oxygen service cart directly to the pressure regulator, at the fill port.
7) Move the pressure regulator knob to the ON position.
8) Use the temperature and pressure tables given in 525B Maintenance Manual Chapter 12,
Oxygen System - Servicing to fill the oxygen cylinder to the correct pressure.
9) Move the pressure regulator knob to the OFF position.
10) Disconnect the oxygen service cart from the fill port on the pressure regulator.
11) Connect the fill line assembly to the pressure regulator. Refer to 525B Maintenance Manual
Chapter 35, Crew Oxygen System - Maintenance Practices.
12) Move the pressure regulator knob to the ON position.
13) Safety the pressure regulator knob in the ON position with safety wire. Refer to 525B
Maintenance Manual Chapter 20, Safetying - Maintenance Practices.
14) Install fuselage access panels 212AZ, 212CZ, and 212DZ. Refer to 525 Maintenance
Manual Chapter 6, Access Plates and Panels Identification - Description and Operation.
(Continued)
525BCOMP-01-01
32
35-00-01
525BCOMP-01-01
Oxygen System Fill Port(Continued)
33
35-00-02
Plastic Blowout Disc/Green Label
C/1/0
(O) May be missing or damaged provided oxygen pressure is verified prior to each flight.
OPERATIONAL PROCEDURES
During the Exterior Inspection, verify Oxygen Pressure using the gauge in the nose
compartment.
35-20-03
Passenger Oxygen System Mask
C/-/0
(M) Individual oxygen masks or dispensers may be inoperative or missing provided:
a) Affected mask pintle pin is installed, and
b) Associated seat or lavatory is placarded "DO NOT OCCUPY".
MAINTENANCE PROCEDURES
Install the Passenger Oxygen Mask Pintle Pin.
1) If installed, remove the passenger oxygen mask. Refer to 525B Maintenance Manual
Chapter 35, Passenger Oxygen System - Maintenance Practices.
2) Install the pintle pin.
35-20-04
Passenger Oxygen System Drop Out Panel
C/-/0
(M) Individual panels may be out of normal position provided:
a) Oxygen masks and drop out panel are removed, and
b) Associated seats are placarded “DO NOT OCCUPY”.
MAINTENANCE PROCEDURES
Install the Passenger Oxygen Mask Pintle Pin.
1) If installed, remove the passenger oxygen mask. Refer to 525B Maintenance Manual
Chapter 35, Passenger Oxygen System - Maintenance Practices.
2) Install the pintle pin.
525BCOMP-01-01
34
38-00-01
Relief Tube Overboard Drain System
C/1/0
(M) May be inoperative provided:
a) System is deactivated,
b) Refreshment center drain is considered inoperative, and
c) Relief tube is placarded "DO NOT USE".
MAINTENANCE PROCEDURES
Drain the relief tube.
1) Drain the relief tube. Refer to the Model 525B Maintenance Manual Chapter 38 and
Illustrated Parts Catalog.
2) Pull and secure the FLUSH TOILET circuit breaker in the RH power junction box.
38-30-01
Flushing Toilet System (Excluding Relief Tube)
C/1/0
(M) (O) Individual components may be inoperative provided system is:
a) Deactivated or isolated,
b) Verified not to have leaks,
c) Cabin occupants are briefed prior to each flight the toilet is inoperative, and
d) Toilet is placarded "DO NOT USE TOILET".
MAINTENANCE PROCEDURES
Drain the relief tube.
1) Drain the relief tube. Refer to the Model 525B Maintenance Manual Chapter 38 and
Illustrated Parts Catalog.
2) Pull and secure the FLUSH TOILET circuit breaker in the RH power junction box.
3) Inspect the system for leaks.
OPERATIONAL PROCEDURES
Passengers must be briefed prior to each flight that lavatory should not be used.
525BCOMP-01-01
35
46-00-01-01-10
Electronic Flight Bag (EFB) System Class 3 EFBs(Includes IFIS)
C/-/0
(O) May be inoperative provided alternate procedures are established and used.
OPERATIONAL PROCEDURES
Appropriate and current navigational publications for route of flight and alternates must be
carried onboard.
46-00-01-02-10
Electronic Flight Bag (EFB) System Data Connectivity (Class 2)
C/-/0
(O) May be inoperative provided alternate procedures are established and used.
OPERATIONAL PROCEDURES
Appropriate and current navigational publications for route of flight and alternates must be
carried onboard.
46-00-01-03-10
Electronic Flight Bag (EFB) System Power Connection(Class 1 & 2)
C/-/(O) May be inoperative provided alternate procedures are established and used.
OPERATIONAL PROCEDURES
Appropriate and current navigational publications for route of flight and alternates must be
carried onboard.
525BCOMP-01-01
36
46-00-01-04-10
Electronic Flight Bag (EFB) System Mounting Device (Class 2)
C/-/0
(M) (O)May be inoperative provided:
a) Associated EFB and hardware is secured by an alternate means or removed from the
aircraft, and
b) Alternate procedures are established and used.
MAINTENANCE PROCEDURES
Remove the EFB.
1) Remove the EFB from the mounting device.
(a) Remove the EFB from the airplane or stow it in a location where it will not be
mistaken for a serviceable EFB.
2) Remove the manufacturer-supplied hardware that attaches the mounting device to the
airplane.
3) Remove the mounting device from the airplane.
4) If supplied, stow or remove related electrical wiring.
OPERATIONAL PROCEDURES
1) The affected flight crew member(s) will determine an adequate storage location for the
EFB(s) prior to flight.
2) The flight crew will brief on alternate EFB usage for the intended flight.
46-00-01-04-20
Electronic Flight Bag (EFB) System Mounting Device (Class 2)
D/-/0
(M) May be inoperative provided:
a) Associated EFB and hardware is secured by an alternate means or removed from the
aircraft, and
b) Procedures do not require its use.
MAINTENANCE PROCEDURES
Remove the EFB.
1) Remove the EFB from the mounting device.
(a) Remove the EFB from the airplane or stow it in a location where it will not be
mistaken for a serviceable EFB.
2) Remove the manufacturer-supplied hardware that attaches the mounting device to the
airplane.
3) Remove the mounting device from the airplane.
4) If supplied, stow or remove related electrical wiring.
525BCOMP-01-01
37
52-11-01-01
Cabin Door System Pull Chain
C/1/0
(O) May be inoperative provided:
a) Damaged or missing chain does not interfere with door operation, and
b) Door is not allowed to open unattended.
OPERATIONAL PROCEDURES
Flight crew must maintain control of the door while opening utilizing the interior door handle or
other means.
52-11-01-02
Cabin Door System Cabin Door Step Support Cables(Units 0350 and On)
C/2/0
(M)(O) May be inoperative provided:
a) Door steps are considered inoperative,
b) Alternate procedures for entering/exiting aircraft are established and used, and
c) Support cables are removed.
MAINTENANCE PROCEDURES
Remove support cables.
1) Remove support from the aircraft. Refer to the Model 525B Maintenance Manual Chapter
52 Doors and Illustrated Parts Catalog.
2) Steps may be removed. If left installed, they must be supported when entering or exiting
the aircraft.
OPERATIONAL PROCEDURES
An alternate means to enter and exit the aircraft (i.e. step ladder) must be provided.
52-11-01-03
Cabin Door System Cabin Door Step System(Units 0350 and On)
C/1/0
(M)(O) May be inoperative provided:
a) Affected step assembly is removed, and
b) Alternate method to enter/exit aircraft is established and used.
MAINTENANCE PROCEDURES
Remove step assembly.
1) Remove support cables from the aircraft. Refer to the Model 525B Maintenance Manual
Chapter 52 Doors and Illustrated Parts Catalog.
2) Remove step assembly from aircraft.
OPERATIONAL PROCEDURES
An alternate means to enter and exit the aircraft (i.e. step ladder) must be provided.
525BCOMP-01-01
38
52-11-01-04
Cabin Door System Cabin Door Step Rate Controller(Units 0350 and On)
C/2/0
(M) May be inoperative provided:
a) Affected rate controller is removed,
b) Cabin door step are not allowed to unfold uncontrolled, and
c) Both step support cables are operative and used to lower and raise steps.
MAINTENANCE PROCEDURES
Remove Affected Step Rate Controller.
1) Remove Step Rate Controller from the step assembly. Refer to the Model 525B
Maintenance Manual Chapter 52 Doors and Illustrated Parts Catalog.
2) Remove step assembly from aircraft.
52-11-01-05
Cabin Door System Cabin Door Ladder
C/1/0
(M) (O) May be inoperative provided:
a) Ladder assembly is removed, and
b) Alternate method to enter/exit aircraft is established and used.
MAINTENANCE PROCEDURES
Remove ladder assembly.
1) Remove support chains from the aircraft. Refer to the Model 525B Maintenance Manual
Chapter 52 Doors and Illustrated Parts Catalog.
2) Remove ladder assembly from aircraft.
OPERATIONAL PROCEDURES
An alternate means to enter and exit the aircraft (i.e. step ladder) must be provided.
525BCOMP-01-01
39
52-11-01-06
Cabin Door System Cabin Door Ladder Support Chains
C/2/0
(M)(O) May be inoperative provided:
a) Door ladder is considered inoperative,
b) Alternate procedures for entering/exiting aircraft are established and used, and
c) Support chains are removed.
MAINTENANCE PROCEDURES
Remove support chains.
1) Remove support chains from the aircraft. Refer to the Model 525B Maintenance Manual
Chapter 52 Doors and Illustrated Parts Catalog.
2) The ladder may be removed. If left installed, it must be supported when entering or
exiting the aircraft.
OPERATIONAL PROCEDURES
An alternate means to enter and exit the aircraft (i.e. step ladder) must be provided.
52-11-01-07
Cabin Door System Gust Lock
B/1/0
(O) May be inoperative provided cabin door is not left unattended when open.
OPERATIONAL PROCEDURES
A member of the flight crew will open and hold the door when occupants are entering or exiting
the aircraft. Otherwise, the door must be closed and latched.
52-40-01-02
Nose Baggage Compartment Door Key Lock Right Side
C/1/0
(O) May be inoperative in the locked position provided:
a) Left side door key lock is not failed in the locked position, and
b) Alternate procedures are established and used to perform required preflight actions
through the left door.
NOTE: BAGGAGE DOOR FWD amber annunciator will illuminate.
OPERATIONAL PROCEDURES
The flight crew may use an extendable mirror and flashlight to visually inspect the nose baggage
compartment before flight.
525BCOMP-01-01
40
52-70-01-01
Door Warning System Main Cabin
B/1/0
(O) May be inoperative provided:
a) Door is verified closed and handle latched prior to each flight,
b) All lock flags are visible in sight glass locations,
c) Internal door handle is verified correctly stowed,
d) Aircraft is operated at 200 KIAS or less, and
e) Aircraft is operated at FL250 or below.
OPERATIONAL PROCEDURES
Prior to each flight, a crew member must make sure the main cabin doors is closed securely,
latched, all lock flags are visible in their respective sight glasses and the handle is stowed in the
upright position.
52-70-01-02
Door Warning System Nose Baggage
B/2/0
(O) May be inoperative provided:
a) Door is verified closed, latched, and locked prior to each flight, and
b) Aircraft is operated at 200 KIAS or less.
OPERATIONAL PROCEDURES
Prior to each flight, a crew member must make sure the aft baggage door is closed securely,
latched and locked.
52-70-01-03
Door Warning System Aft Baggage
C/1/0
(O) May be inoperative provided:
a) Door is verified closed, latched, and locked prior to each flight, and
b) Aircraft is operated at 200 KIAS or less.
OPERATIONAL PROCEDURES
Prior to each flight, a crew member must make sure the aft baggage door is closed securely,
latched and locked.
525BCOMP-01-01
41
52-70-01-04
Door Warning System Emergency Exit
C/1/0
(O) May be inoperative provided:
a) Hatch is verified closed and latched prior to each flight, and
b) Aircraft is operated at FL410 or below.
OPERATIONAL PROCEDURES
Prior to each flight, a crew member must make sure the Emergency Exit door is closed securely
and latched.
525BCOMP-01-01
42
CABIN ALTITUDE vs. CABIN PRESSURE DIFFERENTIAL CONVERSION
(Cabin Pressure Differential Display or Cabin Altimeter Inoperative)
CABIN
ALT
CABIN ALTITUDE x 1000'
x 1000'
11.0
10.5
10.0
9.5
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
AIRCRAFT PRESSURE ALTITUDE  1000'
0
0.0
0.3
0.5
5
0.0
0.3
0.6
0.8
10
15
20
25
28
31
33
35
37
39
41
43
45
47
49
51
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.5
1.7
1.9
2.1
2.4
2.6
2.8
3.1
3.3
3.6
3.8
4.1
4.3
4.6
4.9
5.1
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.3
3.5
3.7
3.9
4.2
4.4
4.6
4.9
5.1
5.4
5.6
5.9
6.1
6.4
6.7
6.9
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
5.2
5.5
5.7
5.9
6.2
6.4
6.7
6.9
7.2
7.4
7.7
7.9
8.2
8.5
4.3
4.5
4.7
4.9
5.1
5.3
5.5
5.7
5.9
6.1
6.3
6.5
6.8
7.0
7.2
7.5
7.7
8.0
8.2
8.5
8.7
9.0
9.2
9.5
9.8
4.9
5.1
5.3
5.5
5.7
5.9
6.1
6.4
6.6
6.8
7.0
7.2
7.5
7.7
7.9
8.2
8.4
8.6
8.9
9.1
9.4
9.7
9.9
10.2
10.5
5.6
5.8
6.0
6.2
6.4
6.6
6.8
7.1
7.3
7.5
7.7
7.9
8.2
8.4
8.6
8.9
9.1
9.3
9.6
9.8
10.1
5.9
6.1
6.3
6.5
6.7
6.9
7.1
7.3
7.5
7.8
8.0
8.2
8.4
8.7
8.9
9.1
9.4
9.6
9.9
10.1
6.3
6.4
6.6
6.8
7.0
7.2
7.5
7.7
7.9
8.1
8.3
8.5
8.8
9.0
9.2
9.5
9.7
10.0
10.2
6.6
6.8
7.0
7.2
7.4
7.6
7.8
8.0
8.2
8.4
8.6
8.9
9.1
9.3
9.5
9.8
10.0
6.9
7.1
7.3
7.5
7.7
7.9
8.1
8.3
8.5
8.7
8.9
9.1
9.4
9.6
9.8
10.1
7.1
7.3
7.5
7.7
7.9
8.1
8.3
8.5
8.7
9.0
9.2
9.4
9.6
9.9
10.1
7.4
7.5
7.7
7.9
8.1
8.3
8.6
8.8
9.0
9.2
9.4
9.6
9.9
10.1
7.6
7.8
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.9
10.1
7.8
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.8
10.1
8.0
8.1
8.3
8.5
8.7
8.9
9.2
9.4
9.6
9.8
10.0
8.1
8.3
8.5
8.7
8.9
9.1
9.3
9.5
9.7
10.0
EXAMPLE: Aircraft is at FL 350 and Cabin Pressure Differential Gauge reads 8.8 psid,
Cabin Altitude is 5,000'.
EXAMPLE: Aircraft Is At FL 350 and Cabin Altimeter reads 5,000', Cabin Pressure
Differential is 8.8 psid.
525BCOMP-01-01
43