Federal Aviation Administration

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Auxiliary Power Units (APU) Approvals

The minimum performance standards that gas turbine auxiliary power units (APU) must meet are specified in Technical Standard Order (TSO) C77b, dated 12/20/2000. Part 21, Subpart O, provides generic TSO approval procedures.

Page Last Modified: 08/06/09 15:13 EDT

This page can be viewed online at: http://www.faa.gov/aircraft/air_cert/design_approvals/engine_prop/apu_approvals/