S 862-116
 (3)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P6 Main Power Distribution Panel
 1) 6L21 LE FLAP ELEC CONT GRP B DRIVE 1
 2) 6L22 LE FLAP ELEC CONT GRP A DRIVE 2
 3) 6L23 LE FLAP ELEC CONT GRP A DRIVE 3
 4) 6L24 LE FLAP ELEC CONT GRP A DRIVE 4
 5) 6E3 PRIM LE FLAP CONT GRP A AC
 6) 6E4 PRIM LE FLAP CONT GRP A DC
 7) 6E5 PRIM LE FLAP CONT GRP B AC
 8) 6E6 PRIM LE FLAP CONT GRP B DC

 (b)  
P414 Power Distribution Center - Left
 1) 414A5 LE FLAP ELEC DRIVE 1
 2) 414A2 LE FLAP ELEC RIVE 4

 (c)  
P415 Power Distribution Center - Right
 1) 415M35 LE FLAP ELEC DRIVE 2
 2) 415B32 LE FLAP ELEC DRIVE 3

 (d)  
P7 Overhead Circuit Breaker Panel
 1) 7C10 FLT CONT ELEC 2L-AC
 2) 7C11 FLT CONT ELEC 2L-DC
 3) 7C12 FLT CONT ELEC 1L-AC
 4) 7C13 FLT CONT ELEC 1L-DC
 5) 7C14 FLT CONT ELEC 1R-AC
 6) 7C15 FLT CONT ELEC 1R-DC
 7) 7C16 FLT CONT ELEC 2R-AC
 8) 7C17 FLT CONT ELEC 2R-DC

 S 862-117
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ LE FLAP SAFETY LOCKS. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT DO THE STEPS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (4)  
Do this task: "Safety Lock Removal and Leading Edge Flap Activation" (AMM 27-81-00/201).

 S 862-118

 (5)  
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 862-155
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (6)  Make sure that the TE flaps are extended 5 unit minimum.
 S 862-120
 WARNING:_______MAKE SURE THE FLAP AREA IS CLEAR FOR EXTENSION. IF THE LE FLAPS AND THE FLAP CONTROL LEVER DO NOT AGREE, THE LE FLAPS WILL EXTEND WHEN YOU SUPPLY PNEUMATIC POWER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (7)  
Do this task: "Supply Pneumatic Power" (AMM 36-00-00/201).

 S 862-121

 (8)  
Retract the LE flaps electrically for approximately 15 seconds.

 (a)  
Push the ALTN FLAPS ARM switch to put the flap system in the alternate control.

 (b)  
Put the ALTN FLAPS EXT/RET switch to the RET position.

 S 712-122
 (9)  
After 15 seconds, put the flap system in the usual operation:

 (a)  
Put the ALTN FLAPS EXT/RET in the OFF position.

 (b)  
Push the ALTN FLAPS ARM switch.

 (c)  
Make sure the LE flaps are in the pneumatic extended position.

 E.
Put the Airplane Back to Its Usual Condition

 S 862-123
 (1)  Do this task if hydraulic power is not necessary for hydraulic systems No. 1 and 4: "Hydraulic Power Depressurization" (AMM 29-11-00/201).
 (2)  S 862-124Do this task if pneumatic power is not necessary: Removal" (AMM 36-00-00/201). "Pneumatic Power
 (3)  S 862-125Do this task if electrical power is not necessary: Power Removal" (AMM 24-22-00/201). "Electrical

 TASK 27-81-03-002-177
 12. AIRPLANES WITH THE DRIVE UNIT 60B80042-36 OR LOWER DASH NUMBER; Overpressure (Gage) Switch Removal
__________________________________
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 27-81-03
 ALL  ú ú 04 Page 243 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊 飛行操縱 FLIGHT CONTROLS 7(116)