Regulations last checked for updates: Feb 07, 2026

Title 14 - Aeronautics and Space last revised: Dec 19, 2026
All TitlesTitle 14Chapter IPart 27Subpart B - Subpart B—Flight
View all text of Subpart B [§ 27.21 - § 27.251]
§ 27.251 - Vibration.

Each part of the rotorcraft must be free from excessive vibration under each appropriate speed and power condition.

authority: 49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704
source: Docket No. 5074, 29 FR 15695, Nov. 24, 1964, unless otherwise noted.
cite as: 14 CFR 27.251
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