Appendix A to Part 23 - Instructions for Continued Airworthiness
14:1.0.1.3.11.9.27.1.4 : Appendix A
Appendix A to Part 23 - Instructions for Continued Airworthiness
A23.1 General
(a) This appendix specifies requirements for the preparation of
Instructions for Continued Airworthiness as required by this
part.
(b) The Instructions for Continued Airworthiness for each
airplane must include the Instructions for Continued Airworthiness
for each engine and propeller (hereinafter designated “products”),
for each appliance required by this chapter, and any required
information relating to the interface of those appliances and
products with the airplane. If Instructions for Continued
Airworthiness are not supplied by the manufacturer of an appliance
or product installed in the airplane, the Instructions for
Continued Airworthiness for the airplane must include the
information essential to the continued airworthiness of the
airplane.
(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 products and appliances
installed in the airplane will be distributed.
A23.2 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.
A23.3 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 and information:
(a) Airplane maintenance manual or section.
(1) Introduction information that includes an explanation of the
airplane's features and data to the extent necessary for
maintenance or preventive maintenance.
(2) A description of the airplane and its systems and
installations including its engines, propellers, and
appliances.
(3) Basic control and operation information describing how the
airplane components and systems are controlled and how they
operate, including any special procedures and limitations that
apply.
(4) Servicing information that covers details regarding
servicing points, capacities of tanks, reservoirs, types of fluids
to be used, pressures applicable to the various systems, location
of access panels for inspection and servicing, locations of
lubrication points, lubricants to be used, equipment required for
servicing, tow instructions and limitations, mooring, jacking, and
leveling information.
(b) Maintenance Instructions.
(1) Scheduling information for each part of the airplane and its
engines, auxiliary power units, propellers, accessories,
instruments, and equipment that provides the recommended periods at
which they 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
reference 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 airplane.
(2) Troubleshooting information describing probable
malfunctions, how to recognize those malfunctions, and the remedial
action for those malfunctions.
(3) Information describing the order and method of removing and
replacing products and parts with any necessary precautions to be
taken.
(4) Other general procedural instructions including procedures
for system testing during ground running, symmetry checks, weighing
and determining the center of gravity, lifting and shoring, and
storage limitations.
(c) Diagrams of structural access plates and information needed
to gain access for inspections when access plates are not
provided.
(d) Details for the application of special inspection techniques
including radiographic and ultrasonic testing where such processes
are specified by the applicant.
(e) Information needed to apply protective treatments to the
structure after inspection.
(f) All data relative to structural fasteners such as
identification, discard recommendations, and torque values.
(g) A list of special tools needed.
(h) In addition, for level 4 airplanes, the following
information must be furnished -
(1) Electrical loads applicable to the various systems;
(2) Methods of balancing control surfaces;
(3) Identification of primary and secondary structures; and
(4) Special repair methods applicable to the airplane.
A23.4 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 document. This section
must set forth each mandatory replacement time, structural
inspection interval, and related structural inspection procedure
required for type certification. If the Instructions for Continued
Airworthiness consist of multiple documents, the section required
by this paragraph must be included in the principal manual. 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.”