1. Regulations
  2. title 14
  3. chapter I
  4. part 27
  5. subpart D
  6. subjgrp 175
  7. § 27.659

View all text of Subjgrp 175 [§ 27.653 - § 27.663]

§ 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