747-400 AMM 飞机维护手册 起落架 LANDING GEAR 9(121)

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747-400 MAINTENANCE MANUAL
 3) Remove the actuator from the primary door warning sensor,
 S410.
 4) Make sure that Bit 27 of Label 270/Sdi 00 is a 1 (OPEN).
 5) Put an actuator on the alternate door warning sensor, S426
 (right wing gear). 6) Make sure that Bit 27 of Label 272/Sdi 00 is a 0 (NOT OPEN). 7) Remove the actuator from the alternate door warning sensor, S426. 8) Make sure that Bit 27 of Label 272/Sdi 00 is a 1 (OPEN).
 H. Put the Airplane Back to Its Usual Condition
 S 442-035
 (1)  
Do this task: Put the Safety-Sensitive Systems Back to the
 Condition Before Air Mode Simulation (Ref 32-09-02/201).

 S 862-026

 (2)
Move the control handle for the landing gear to the DN position.

 S 862-037
 WARNING: MAKE SURE THAT ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE DOOR
_______ OPERATION PATH. THE FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS OR DAMAGE EQUIPMENT.
 (3)  
Move the ground release handles for the main gear doors to the "Doors Closed" position.

 (4)
Move the control handle for the landing gear to the OFF position.

 (5)
Remove electrical power if it is not necessary (Ref 24-22-00/201).

 S 862-039

 (6)  
Remove hydraulic pressure from systems No. 1 and 4 if it is not necessary (Ref 29-11-00/201).

 S 862-040
 S 862-038
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-61-32
 ALL  ú ú 01 Page 209 ú Oct 10/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.

 

 

　
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