Rotor drive system and control mechanism tests.

CFR · 2024-01-01 · US · Title 14

(a) (1) Ten-hour test cycles must be used, except that the test cycle must be extended to include the OEI test of paragraphs (b)(2) and (k), of this section if OEI ratings are requested. (2) The tests must be conducted on the rotorcraft. (3) The test torque and rotational speed must be— (i) Determined by the powerplant limitations; and (ii) Absorbed by the rotors to be approved for the rotorcraft. (b) (1) Except as prescribed in paragraphs (b)(2) and (b)(3) of this section, the takeoff torque run must consist of 1 hour of alternate runs of 5 minutes at takeoff torque and the maximum speed for use with takeoff torque, and 5 minutes at as low an engine idle speed as (2) For helicopters for which the use of a 2 (i) Each run must consist of at least one period of 2 (ii) Each run must consist of at least one period, for each engine in sequence, during which that engine simulates a power failure and the remaining engines are run at the 2 (3) For multiengine, turbine-powered rotorcraft for which the use of 30-second/2-minute OEI power is requested, the takeoff run must be conducted as prescribed in paragraph (b)(1) of this section except for the following: (i) Immediately following any one 5-minute power-on run required by paragraph (b)(1) of this section, simulate a failure for each power source in turn, and apply the maximum torque and the maximum speed for use with 30-second OEI power to the remaining affected drive system power inputs for not less than 30 seconds. Each applicati

official document · source cfr-2024 · id 14:§ 29.923