Appendix A to Part 33 - Instructions for Continued Airworthiness
14:1.0.1.3.17.9.283.1.31 : Appendix A
Appendix A to Part 33 - Instructions for Continued Airworthiness
a33.1 general
(a) This appendix specifies requirements for the preparation of
Instructions for Continued Airworthiness as required by § 33.4.
(b) The Instructions for Continued Airworthiness for each engine
must include the Instructions for Continued Airworthiness for all
engine parts. If Instructions for Continued Airworthiness are not
supplied by the engine part manufacturer for an engine part, the
Instructions for Continued Airworthiness for the engine must
include the information essential to the continued airworthiness of
the engine.
(c) The applicant must submit to the FAA a program to show how
changes to the Instructions for Continued Airworthiness made by the
applicant or by the manufacturers of engine parts will be
distributed.
a33.2 format
(a) The Instructions for Continued Airworthiness must be in the
form of a manual or manuals as appropriate for the quantity of data
to be provided.
(b) The format of the manual or manuals must provide for a
practical arrangement.
a33.3 content
The contents of the manual or manuals must be prepared in the
English language. The Instructions for Continued Airworthiness must
contain the following manuals or sections, as appropriate, and
information:
(a) Engine Maintenance Manual or Section. (1)
Introduction information that includes an explanation of the
engine's features and data to the extent necessary for maintenance
or preventive maintenance.
(2) A detailed description of the engine and its components,
systems, and installations.
(3) Installation instructions, including proper procedures for
uncrating, deinhibiting, acceptance checking, lifting, and
attaching accessories, with any necessary checks.
(4) Basic control and operating information describing how the
engine components, systems, and installations operate, and
information describing the methods of starting, running, testing,
and stopping the engine and its parts including any special
procedures and limitations that apply.
(5) Servicing information that covers details regarding
servicing points, capacities of tanks, reservoirs, types of fluids
to be used, pressures applicable to the various systems, locations
of lubrication points, lubricants to be used, and equipment
required for servicing.
(6) Scheduling information for each part of the engine that
provides the recommended periods at which it should be cleaned,
inspected, adjusted, tested, and lubricated, and the degree of
inspection the applicable wear tolerances, and work recommended at
these periods. However, the applicant may refer to an accessory,
instrument, or equipment manufacturer as the source of this
information if the applicant shows that the item has an
exceptionally high degree of complexity requiring specialized
maintenance techniques, test equipment, or expertise. The
recommended overhaul periods and necessary cross references to the
Airworthiness Limitations section of the manual must also be
included. In addition, the applicant must include an inspection
program that includes the frequency and extent of the inspections
necessary to provide for the continued airworthiness of the
engine.
(7) Troubleshooting information describing probable
malfunctions, how to recognize those malfunctions, and the remedial
action for those malfunctions.
(8) Information describing the order and method of removing the
engine and its parts and replacing parts, with any necessary
precautions to be taken. Instructions for proper ground handling,
crating, and shipping must also be included.
(9) A list of the tools and equipment necessary for maintenance
and directions as to their method of use.
(b) Engine Overhaul Manual or Section. (1) Disassembly
information including the order and method of disassembly for
overhaul.
(2) Cleaning and inspection instructions that cover the
materials and apparatus to be used and methods and precautions to
be taken during overhaul. Methods of overhaul inspection must also
be included.
(3) Details of all fits and clearances relevant to overhaul.
(4) Details of repair methods for worn or otherwise substandard
parts and components along with the information necessary to
determine when replacement is necessary.
(5) The order and method of assembly at overhaul.
(6) Instructions for testing after overhaul.
(7) Instructions for storage preparation, including any storage
limits.
(8) A list of tools needed for overhaul.
(c) ETOPS Requirements. For an applicant seeking
eligibility for an engine to be installed on an airplane approved
for ETOPS, the Instructions for Continued Airworthiness must
include procedures for engine condition monitoring. The engine
condition monitoring procedures must be able to determine prior to
flight, whether an engine is capable of providing, within approved
engine operating limits, maximum continuous power or thrust, bleed
air, and power extraction required for a relevant engine
inoperative diversion. For an engine to be installed on a
two-engine airplane approved for ETOPS, the engine condition
monitoring procedures must be validated before ETOPS eligibility is
granted.
A33.4 airworthiness limitations section
The Instructions for Continued Airworthiness must contain a
section titled Airworthiness Limitations that is segregated and
clearly distinguishable from the rest of the manual.
(a) For all engines:
(1) The Airworthiness Limitations section must set forth each
mandatory replacement time, inspection interval, and related
procedure required for type certification. If the Instructions for
Continued Airworthiness consist of multiple documents, the section
required under this paragraph must be included in the principal
manual.
(2) This section must contain a legible statement in a prominent
location that reads: “The Airworthiness Limitations section is FAA
approved and specifies maintenance required under §§ 43.16 and
91.403 of Title 14 of the Code of Federal Regulations unless an
alternative program has been FAA approved.”
(b) For rotorcraft engines having 30-second OEI and 2-minute OEI
ratings:
(1) The Airworthiness Limitations section must also prescribe
the mandatory post-flight inspections and maintenance actions
associated with any use of either 30-second OEI or 2-minute OEI
ratings.
(2) The applicant must validate the adequacy of the inspections
and maintenance actions required under paragraph (b)(1) of this
section A33.4.
(3) The applicant must establish an in-service engine evaluation
program to ensure the continued adequacy of the instructions for
mandatory post-flight inspections and maintenance actions
prescribed under paragraph (b)(1) of this section A33.4 and of the
data for § 33.5(b)(4) pertaining to power availability. The program
must include service engine tests or equivalent service engine test
experience on engines of similar design and evaluations of service
usage of the 30-second OEI or 2-minute OEI ratings.
[Amdt. 33-9, 45 FR 60181, Sept. 11, 1980, as amended by Amdt.
33-13, 54 FR 34330, Aug. 18, 1989; Amdt. 33-21, 72 FR 1878, Jan.
16, 2007; Amdt. 33-25, 73 FR 48124, Aug. 18, 2008]