380.Water displacing corrosion inhibiting compound has been applied during construction on certain airplanes Ain the locations shown in this figure Periodic reapplication in these, and other locations, is required to maintain effectiveness of this protection ( )

557.There is not too much wear of the rollers or signs of grooves on the flap track ( )

556.Parallel wound motor is DC electric motor whose field coils are connected in parallel with the armature A parallel wound motor has a low starting torque, but is operates at a relatively constant speed ( )

555.If you start just one engine, the pack does not operate until two minutes after the start The pack OFF light stays on during the two minutes ( )

554.The primary document containing the procedures for the continuing airworthiness of an airplane is the airplane’s maintenance manual( )

553.Ingeneral, however, it is desired that the following chapter arrangements and breakdown be followed uniformly and to the maximum extent practicable in all manuals ( )

552.滑油的另一个重要作用是保护金属表面不被腐蚀。( )

551.Use the mark to help you put the clamp in its correct position( )

550.EEC 接收来自高压涡轮的模拟信号( )

549.Send an order for the specified paint directly to the manufacturer( )

548.用干净的布吸收液体。( )