AMC E 740(f)(1) Multi-spool Engines

Where an Endurance Test is conducted in accordance with CS-E 740(f)(1) supplementary evidence is required to substantiate any rotational speed limitations higher than those covered in that test. This AMC indicates an acceptable basis for conducting such supplementary tests.

(1)The Engine on which the supplementary tests are conducted may be the same Engine as that which completed the Endurance Test, or an Engine of a standard similar in all those aspects which could be affected by the increased rotational speed.

(2)Where increased rotational speed limitations are desired in respect of both Take-off and Maximum Continuous Power/Thrust conditions, the supplementary testing should provide for running at the increased rotational speed of equal duration to, and in all other relevant respects as severe as, the conditions prescribed in the type endurance test schedule for running at Take-off and Maximum Continuous Power/Thrust conditions.

(3)Where increased rotational speed limitations are desired in respect of either Take-off or Maximum Continuous Power/Thrust conditions only, the supplementary testing should provide for –

(a)Where the test is conducted on parts which have already completed the Endurance Test (or its equivalent). Running at the increased rotational speed of equal duration to, and in all other relevant respects as severe as, the conditions of the Endurance Test schedule for running at the Take-off or Maximum Continuous Power/Thrust conditions as appropriate.

(b)Where the test is conducted on parts which have not completed an Endurance Test (or its equivalent). Running of equal duration to, and in all other relevant respects as severe as, the conditions of the Endurance Test schedule for running at the Take-off and Maximum Continuous Power/Thrust conditions, but with only that period of running for which higher limitations are desired, conducted at the increased rotational speed.

[Amdt. No.: E/1]