scope:

This specification establishes the performance, operating characteristics, design features, detailed interface configuration definitions, and installation envelopes for a gas turbine auxiliary power unit (APU) with a government furnished equipment (GFE) electrical generator attached. The APU will be operated aboard the S-3A aircraft. This specification also establishes the demonstrations, tests, reports, inspection procedures, and other data required for satisfactory completion and acceptance, by the Using Service, of the Preliminary Flight Rating Tests (PFRT) and the Verification Tests (VT) for the APU. Further, this specification identifies the tests, procedures and data required for satisfactory completion of the Acceptance Tests (AT) of each production unit. Notwithstanding the requirements for test verification of individual points of performance or operating characteristics of the APU covered by this specification for purposes of PFRT, VT, or AT, the APU manufacturer shall continue to be fully responsible for all features, characteristics, and performance of the APU throughout the environmental conditions and operating envelope, to the extent required by the applicable contract. This specification also establishes the content and format to be used by the APU manufacturer for the preparation of the model specification in accordance with 6.5.

intended Use: