ED Decision
2021/016/R
(a) To demonstrate the remaining capability of the rotorcraft after a single bird strike, the applicant should evaluate the parts of the rotorcraft as follows:
(1) the windshield directly in front of the occupants and its supporting frame should be capable of withstanding a bird strike without penetration; and
(2) any systems and equipment (including their controls) that are essential to ensure a safe landing and are installed near the windshield and its supporting frame should remain operative in case of shock loads resulting from a bird strike.
Note: the capability to withstand multiple bird strikes is only evaluated for engines as specified under CS-E 800 ‘Bird Strike and Ingestion’.
(b) For the demonstration under point (a), the altitude range within which the velocity VH is evaluated should be defined and should not exceed 2 438 m (8 000 ft).
[Amdt 27/9]
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