The faulty left-hand engine failed catastrophically as the aircraft approached the airport.飞机快到机场时,本来有故障的左引擎突然熄火,引发了灾难。Quality control staff are employed to check for any faults.质量控制人员被聘请来检查是否有故障。Excessive tyre wear may be caused by faulty brakes.轮胎过度磨损可能是刹车有故障造成的。If there is a malfunction, the gears will automatically disengage.要是有故障,排挡会自动松开。