412.The Engine LP Valve closes when :

　The fuel booster pumps pressure decreases.

　The Engine is shut down or the ENG FIRE pushbutton is released out.

　The Engine fire detection system senses an engine fire.

正确答案：C

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249.Which reports can be manually generated?

248.How are the standard headers?

247.The line, providing manual start and stop as well as status indication of the DAR, is displayed at the bottom of the AIDS MCDU menu page if :

246.How does the AIDS operate ?

245.Which are the main functions of the AIDS?

244.How is the SSFDR energized ?

243.Which one is an FDIU function ?

242.Which item is used if several task numbers are relative to a same “WARNING/MALFUNCTION” and “CFDS FAULT MESSAGE” association?

241.Compared with the Airbus MMEL, an airline MEL can be :

240.( ) implies :