289.The purpose of the CSD is to convert the variable speed of the engine to a constant speed for the driven of the generator to produce AC power at constant frequency ( )

648.打开控制活门[13]和[20],并操作手摇泵[17]以排空加注系统。 ( )

647.When it is necessary to order any wire bundles from Boeing, operators should provide the base wire bundle number [61-30396 in this case] and tail number of the airplane where the bundle is to be installed on ( )

646.Determine which door has failed to close( )

645.在整个手册中,每个单独系统应使用相同的编码。( )

644.Electronic devices that are used in nearly all aircraft systems are/the computer for system control and monitoring and the control inputs and indications in the cockpit and sensors throughout the whole aircraft ( )

643.The BITE function collects the failures and sends the failure message to the central maintenance computer ( )

642.This is the minimum concentration of flammable vapors in air below which propagation of flame does not occur on contact with a source of ignition ( )

641.有原因或没有原因,文本都可以分为一栏或两栏。( )

640.气动系统从气动气源获取压缩空气,并通过管道向用户系统供应压缩空气。 ( )

639.When the preset threshold is reached, the smoke detector triggers a warning via the Cabin Intercommunication Data System ( )