14 CFR 27.907
§ 27.907 Engine vibration.
United States · 14 CFR — Aeronautics and Space · Status: effective
Cite this
- Citation
- 14 CFR 27.907, § 27.907 Engine vibration, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/54547
- Permanent ID
ys:prov:54547@1- SHA-256
85d4bb9b2013c8e8e3ac73b53e54c64d447e4f1b154ee37c2c3e913f8f2339a1
The hash is SHA-256 of this version's text, with every run of whitespace collapsed to a single space and the ends trimmed. The ID always leads back here, and checking it says whether the text you cited is still the current version.
Full text
(a) Each engine must be installed to prevent the harmful vibration of any part of the engine or rotorcraft.
(b) The addition of the rotor and the rotor drive system to the engine may not subject the principal rotating parts of the engine to excessive vibration stresses. This must be shown by a vibration investigation.
(c) No part of the rotor drive system may be subjected to excessive vibration stresses.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.