54.电子舱的烟雾探测器安装在哪里?( )Where is the location of the avionics smoke detector?( )

648.控制APU引气的部件是( )APU bleed air is contorled by ( )

647.控制高压级引气的是( )The HP stage bleed air is contorled by( )

646.发动机高转速时从( )引气Where is Bleed air from at high engine speed

645.在哪里给旅客氧气瓶充氧( ) Where is the passenger oxygen filling?

644.旅客氧气瓶安装在哪里? What the location of passenger oxygen cylinder installation?

643.旅客氧气分配管道上压差电门测量压差的作用是什么? What is the function of differential pressure switch to measure differential pressure in the passenger oxygen distribution line?

642.氧气系统渗漏测试使用( ) What gas is use to oxygen system leakage test?

641.氧气渗漏测试时,氧气瓶阀门应在( ) Oxygen leakage test, the oxygen cylinder valve should be in what position

640.当氧气面罩上正常/100%选择器选择在正常位时( )What happen if the NORM/100% selecter in NORM position on crew oxygen mask?

639.如何判断烟雾面罩可用( ) What should be checked on the protective breathing equipment available?