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A helicopter of Performance Class 1, after a critical engine failure during take-off, must be able to achieve a rate of climb of at least:
  • A
    100 ft/min at 300 metres.
  • B
    1 000 ft/min at 1 000 feet.
  • C
    100 ft/min at 200 feet.
  • D
    150 ft/min at 60 metres.

According to CS 29.67 - Climb - One Engine Inoperative (OEI):

  • For Category A rotorcraft, in the critical take-off configuration existing along the take-off path, with the critical engine inoperative and the remaining engines at maximum continuous power, the following apply:
  1. The steady rate of climb without ground effect, 61 m (200 ft) above the take-off surface, must be at least 30 m (100 ft) per minute, for each weight, altitude, and temperature.
  2. The steady rate of climb without ground effect, 305 m (1 000 ft) above the take off surface, must be at least 46 m (150 ft) per minute, for each weight, altitude, and temperature.

NOTE:
According to CAT.POL.H.200-General:

  • Helicopters operated in Performance Class 1 shall be certified in Category A or equivalent as determined by the Agency.

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