Regulations last checked for updates: Feb 07, 2026

Title 14 - Aeronautics and Space last revised: Dec 19, 2026
§ 27.241 - Ground resonance.

The rotorcraft may have no dangerous tendency to oscillate on the ground with the rotor turning.

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 27.241