Скачать или смотреть TPE331-10 Prevented Hot start

This was the first start after FCU replacement. The start was aborted because of the rate of EGT rise. The peak temperature reached by the time combustion ceased was only about 625°C (Limit on this engine is 770°C).

Removal and inspection of the FCU found a cam washer internal of the drive spline coupling was not resting in its key-way cutout. This resulted in a start fuel flow of roughly 200 Lbs/Hr. and very aggressive fueling. Normal start fuel flow is 70 Lbs/hr and takeoff fuel flow is ~460 Lbs/hr.

Since the start was aborted well below any temperature limitations no damage was caused to the engine and the FCU was repaired and reinstalled with no other issues.