§ 27.659 - Mass balance.  


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  • § 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]