MORE Instructions For
Continued Airworthiness
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BACKGROUND
There are a total of eight MORE STCs applicable to thirty different
models of Pratt & Whitney Canada PT6A Series engines.
The STCs are designed to require the engine to meet a specified
initial entry condition. The engine’s condition shall be
continually monitored there after and maintained through
specific inspections, maintenance tasks, and on condition
monitoring.
The MORE STCs are approved FAR 33.4 Instructions for
Continued Airworthiness (ICA) intended to supplement specific
sections of the Pratt & Whitney Canada (P&WC) PT6A
maintenance manual.
Use of these Instructions for Continued Airworthiness
(ICA) provides for hot section inspection (HSI) interval
on condition and time between overhaul (TBO) interval
to 8000 hours. The ICA supersedes the need for
compliance with the HSI and TBO intervals defined in
P&WC PT6A Service Bulletin Number 1003.
How it works
The MORE STCs require an on-condition monitoring system
that includes: repetitive inspections, oil and oil filter
analysis, engine performance checks, borescope inspections,
and vibration analysis as some of it’s major components.
GENERAL
INTRODUCTION
The MORE Instructions for Continued Airworthiness are
a set of directions for maintaining the aircraft engine in
a safe and durable condition.
The MORE Instructions for Continued Airworthiness
provide an aggressive repetitive inspection system.
The purpose of the inspections, which
are included in the MORE
Instructions For Continued
Airworthiness, is to look for
problems in the engine. When
problems are found, they are to be
corrected promptly. After the
problem is corrected the engine may
return to flying status.
GENERAL
INTRODUCTION
(continued)
The engine is subjected to an
Initial Entry Inspection.
This inspection is used to
determine the condition of
the engine and to initialize
the engine with respect to
the MORE STC.
GENERAL
INTRODUCTION
(continued)
After the engine has completed
the “Initial Entry
Inspection”, there are
repetitive (periodic) checks
and inspections which must
be performed.
GENERAL
INTRODUCTION
(continued)
The Initial Entry Inspection
establishes baselines that
are used for comparison
evaluations at each
additional inspection
interval, so that the
health, and changes to
the health of the engine
can be determined.
GENERAL
INTRODUCTION
(continued)
A “MORE Scheduled Inspection
Status Sheet” is provided with
each STC. It describes those
tasks that need to be
performed, it states when the
tasks where last performed
and when they need to be
repeated. These inspections are
to be recorded in terms of
TSO.
GENERAL
INTRODUCTION
(continued)
A “MORE Scheduled
Inspection Status Sheet” is
also provided in an
electronic spreadsheet
format, using Microsoft
Excel. A printed copy of this
spreadsheet should be
maintained in the engine
records.
GENERAL
INTRODUCTION (continued)
Engines using MORE Instructions for Continued Airworthiness must still
comply with all applicable Federal Aviation Administration Airworthiness
Directives.
The rotor component service lives defined in P&WC S/B 1002, latest revision,
are to be complied with, and are not superseded by the module repair
intervals defined in the MORE STC.
P&WC S/B 1002 applies to the largest number of engine models, but P&WC
S/B 1302, 1402, 3002, 12002, and 12102 apply to some engine models using
the MORE Instructions for Continued Airworthiness.
The procedures should include but are not limited to:
a.
b.
c.
d.
e.
How the operator will ensure compliance with the requirements of the STC.
The title of the person(s) responsible for performance of the various
elements of the STC.
The name of the person(s) responsible for the STC management.
The procedures for recognition of adverse trends and revision of inspection
frequencies or requirements resulting from maintenance findings.
When adverse trends are recognized the objective is to shorten inspection
intervals and / or to tighten inspection requirements in order to more closely
monitor the engine and to prevent deterioration from progressing to an
unsafe condition.
Operators must maintain all records and reports necessary to demonstrate continued
compliance with the MORE STC.
Inquiries
Questions or comments concerning FSAW 94-48, this
power point presentation, and / or MORE STCs
should be directed to: MORE company, inc.
Headquarters, 775-782-3346 or
info@morecompany.Net pacific time.
MORE company, inc. Engineering office, chief engineer,
Ralph Hawkins, call 781-828-0451 eastern time.
MORE website: www.Morecompany.Net
MAKING AVIATION SAFER AND
MORE RELIABLE