99.Adjust the potentiometer until you do not hear a hum from the
loudspeaker.

675.用扳手拧松并拆下螺帽。

674.Motor the engine without ignition.

673.BE CAREFUL WHEN YOU ( ) PRINTED CIRCUIT BOARDS.

672.该手册应包含有关飞机运营人为使手册保持现行有效所需采取的程序或行
动的信息。

671.为达到在整个行业内以合理统一的形式,向飞行员提供与特定飞机的运行
相关的必要、有用或期望的信息的目的,手册的起草者应在实际可行的范围内
遵循本规范。

670.Use this alternative procedure if during the test the flow indicator
does not reach the predetermined position.

669.清洗系统

668.KEEP PERSONNEL AWAY FROM THE AIRCRAFT WHEN THE THRUST REVERSER

667.WARNING,if not correctly followed,could result in personal injury,or
loss of life.

666.If the microswitch becomes unserviceable, do the deactivation
procedure of the actuator to prevent damage to the valve.