14 CFR 25.1167
§ 25.1167 Accessory gearboxes.
United States · 14 CFR — Aeronautics and Space · Status: effective
Cite this
- Citation
- 14 CFR 25.1167, § 25.1167 Accessory gearboxes, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/54241
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Full text
For airplanes equipped with an accessory gearbox that is not certificated as part of an engine—
(a) The engine with gearbox and connecting transmissions and shafts attached must be subjected to the tests specified in § 33.49 or § 33.87 of this chapter, as applicable;
(b) The accessory gearbox must meet the requirements of §§ 33.25 and 33.53 or 33.91 of this chapter, as applicable; and
(c) Possible misalignments and torsional loadings of the gearbox, transmission, and shaft system, expected to result under normal operating conditions must be evaluated.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.