CS-E 750 Starting Tests

(a)Twenty-five cold starts (i.e. after the Engine has been stopped for not less than two hours) and ten hot starts (i.e. within 15 minutes of shutting-down after the previous running) must be specifically made at evenly distributed intervals throughout the endurance test of CS-E 740. Time to light up and accelerate to idling conditions must be recorded.

(b)Ten False Starts, each followed by a normal start immediately on expiry of the declared drainage period, must be made at evenly distributed intervals throughout the endurance test. Failure to start must be simulated on these occasions by rendering the ignition circuit inoperative. Following each False Start, the combustion chambers, air casings, etc., may be drained, by the normal means provided, of any fuel which may have accumulated. (See AMC E 750(b))

(c)At the conclusion of the endurance test the number of starts must be made up to a total of one hundred. The additional starts necessary to make this aggregate may be ‘hot’ or ‘cold’ starts. All attempted starts including those prescribed in CS-E 750(b) must count towards the total, provided that the normal starting cycle is completed.

(d)In the case of a free power-turbine Engine for Rotorcraft, each normal start must be made with the free power-turbine locked and followed by a run at Ground Idling Conditions for three minutes with the free power-turbine stationary in order to simulate the operation of the Engine in the rotorcraft with the rotor system locked.

(e)Full details of all starts made throughout the endurance test must be recorded. Times to light up and accelerate to idling conditions must be recorded, together with details of all attempted starts, and the reasons for any Failures.

[Amdt No: E/1]