Auxiliary Power Unit辅助动力装置
An auxiliary power unit is an onboard turbine that supplies electrical and pneumatic power while the aircraft is on the ground and, in some designs, as a backup in flight. It appears in maintenance manuals, ground handling procedures, and ETOPS-related documentation where its start limits, bleed air output, and time-between-overhauls are tracked; APU status can affect dispatch under minimum equipment list and extended operations rules.
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Check source meaning → confirm the preferred term → record approved variants and references.
Where this term appears
In localization, auxiliary power unit appears in aircraft general familiarization manuals, ground support equipment interfaces, and maintenance task cards. Translators encounter it when localizing start/shutdown procedures, fire protection system descriptions, and APU replacement instructions, where inlet, exhaust, bleed, and load-compressor terms need consistent rendering across manual suites and ground crew warnings.
Translation checks
A common error is translating APU as “auxiliary engine” or simply “generator,” which misrepresents its pneumatic and turbine functions. Another mistake is omitting APU start-limit or cool-down terminology, so maintenance text may lose the required operating restrictions and thermal-cycle limits, resulting in ground handling errors or exceedance of duty cycles.
Keep the term aligned across your files
Check procedure sequence, part names, limits and cautions against the supplied references. Applicable aviation or market requirements depend on the product and project pathway.
Provide approved terms and previous translations with the source files. Agree how variants, ambiguous wording and revisions will be reviewed. Terminology maintenance and any termbase handback are confirmed in the project scope. See the 8-step AI + expert workflow.
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