CS 29.67 Climb: One Engine Inoperative (OEI)

ED Decision 2003/16/RM

(a)     For Category A rotorcraft, in the critical take-off configuration existing along the take-off path, 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 for which take-off data are to be scheduled with:

(i)      The critical engine inoperative and the remaining engines within approved operating limitations, except that for rotorcraft for which the use of 30-second/2-minute OEI power is requested, only the 2-minute OEI power may be used in showing compliance with this paragraph;

(ii)     The landing gear extended; and

(iii)     The take-off safety speed selected by the applicant.

(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 for which take-off data are to be scheduled with:

(i)      The critical engine inoperative and the remaining engines at maximum continuous power including continuous OEI power, if approved, or at 30-minute  OEI power for rotorcraft for which certification for use of 30-minute OEI power is requested;

(ii)     The landing gear retracted; and

(iii)     The speed selected by the applicant.

(3)     The steady rate of climb (or descent), in feet per minute, at each altitude and temperature at which the rotorcraft is expected to operate and at each weight within the range of weights for which certification is requested, must be determined with:

(i)      The critical engine inoperative and the remaining engines at maximum continuous power including continuous OEI power, if approved, and at 30-minute OEI power for rotorcraft for which certification for the use of 30-minute OEI power is requested;

(ii)     The landing gear retracted; and

(iii)     The speed selected by the applicant.

(b)     For multi-engine Category B rotorcraft meeting the Category A engine isolation requirements, the steady rate of climb (or descent) must be determined at the speed for best rate of climb (or minimum rate of descent) at each altitude, temperature, and weight at which the rotorcraft is expected to operate, with the critical engine inoperative and the remaining engines at maximum continuous power including continuous OEI power, if approved, and at 30-minute OEI power for rotorcraft for which certification for the use of 30-minute OEI power is requested.