Sec. 29.631 - Bird strike.
The rotorcraft must be designed to ensure capability of continued safe
flight and landing (for Category A) or safe landing (for Category B) after
impact with a 2.2-lb (1.0 kg) bird when the velocity of the rotorcraft
(relative to the bird along the flight path of the rotorcraft) is equal to
[Doc. No. 28008, 61 FR 21907, May 10, 1996; 61 FR 33963, July 1,