AIR4204 COMMERCIAL AIRCRAFT AUXILIARY POWER UNIT INSTALLATIONS

Issued

01/29/1991

Features
Issuing Committee
Scope
Content
This Aerospace Information Report (AIR) reviews the factors to be considered in determining the location and arrangement for auxiliary power unit (APU) installations for airborne applications and reviews requirements for flight suitability.
As treated in this discussion, the APU normally includes a power section (or engine), a starting system, an electronic control unit (ECU), a gearbox with accessory mounting pads, and an oil cooling system. The accessories that are driven by the APU, such as CSD's (constant speed drives), alternating current (AC) generators, hydraulic pumps, or air compressors, are not covered here except insofar as they make demands on the APU. The various installation components and systems that are covered here are outlined by the table of contents.
Turbine-type APU's are by far the most highly developed and universally used airborne units, so their installation will dominate the discussion in this document. And, though there have been some APU's developed for military applications, many military transports are adaptations of commercial carrier aircraft. The bulk of the discussion will, therefore, be oriented toward APU installation requirements as developed by the civilian sector. Discussions of the internal design aspects of the APU itself are not within the scope of this document.
Meta TagsDetails
DOI
https://doi.org/10.4271/AIR4204
Pages
107
Citation
SAE International Information Report, COMMERCIAL AIRCRAFT AUXILIARY POWER UNIT INSTALLATIONS, SAE Standard AIR4204, Issued January 1991, https://doi.org/10.4271/AIR4204.
Additional Details
Publisher
Published
Jan 29, 1991
Product Code
AIR4204
Content Type
Information Report
Status
Issued
Language
English

Revisions