ED
Decision 2016/010/R
(See AMC
25J901)
(a) For
the purpose of this subpart, the APU installation includes:
(1) The APU;
(2) Each component that affects the control of
the APU;
(3) Each component that affects the safety of
the APU.
(b) For
the purpose of this subpart,
(1) An essential APU is defined as an APU
whose function is required for the dispatch of the aeroplane and/or continued
safe flight.
(2) A non-essential APU is defined as an APU
whose function is a matter of convenience, either on the ground or in flight,
and may be shut down without jeopardising safe aeroplane operation.
(c) For
each APU:
(1) The installation must comply with:
(i) The
installation instructions provided under CS-APU, and
(ii) The
applicable provisions of this subpart for non-essential APUs, or
(iii) The
applicable provisions of this subpart for essential APUs.
(2) The components of the installation must be
constructed, arranged, and installed so as to ensure their continued safe
operation between normal inspections or overhauls. (See AMC 25J901(c)(2).)
(3) The installation must be accessible for
necessary inspections and maintenance; and
(4) The major components of the installation
must be electrically bonded to the other parts of the aeroplane. (See AMC 25J901(c)(4).)
(d) The
APU installation must comply with CS 25.1309, except that the effects of the
following need not comply with CS
25.1309(b) (see AMC
25.901(c)):
(1) APU case burn through or rupture; and
(2)
Uncontained APU rotor failure.
[Amdt 25/1]
[Amdt
25/18]
EASA aviation regulations for large aeroplane APU installations require adherence to manufacturer instructions and specific safety standards. APUs are classified as essential (required for flight) or non-essential (convenience). Installations must ensure safe operation, accessibility for maintenance, electrical bonding, and compliance with safety regulations, with exceptions for certain APU failure scenarios.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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