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A
747-400 MAINTENANCE MANUAL
 (b)  Hold the door control switch in the closed position
 approximately 3 seconds until the hooks turn to the full closed
 position.
 (c)  Manually push and hold the plunger of the door closed switch
 and hold the door control switch in the closed position.
 NOTE:____ The latch cams will turn electrically to the full closed
 position.
 

　
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