14 CFR 27.659 - Mass balance.

Regulations last checked for updates: May 21, 2024

Title 14 - Aeronautics and Space last revised: May 07, 2024

§ 27.659 - Mass balance.

(a) The rotors and blades must be mass balanced as necessary to—

(1) Prevent excessive vibration; and

(2) Prevent flutter at any speed up to the maximum forward speed.

(b) The structural integrity of the mass balance installation must be substantiated.

[Amdt. 27-2, 33 FR 963, Jan. 26, 1968]

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 27.659