a) 6E3 PRIM LE FLAP CONT GRP A AC b) 6E4 PRIM LE FLAP CONT GRP A DC c) 6E5 PRIM LE FLAP CONT GRP B AC
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747-400 MAINTENANCE MANUAL
 d)  6E6 PRIM LE FLAP CONT GRP B DC
 S 715-108
 (3)  
Do the operational test of the group A leading edge flaps during reverse thrust operation.

 S 715-008

 (4)  
Do a test on the alternate operation of the LE flap system.

 (a)  
Move the flap control lever to the full UP detent.
 1) Make sure the LE flaps retract.

 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE WING
_______ LE BEFORE YOU EXTEND THE FLAPS. FLAPS EXTEND AND RETRACT QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 CAUTION: DO NOT ELECTRICALLY EXTEND OR RETRACT THE FLAPS MORE THAN
_______ ONE TIME IN 5 MINUTES. DAMAGE TO THE MOTOR CAN OCCUR IF THE MOTOR BECOMES TOO HOT.
 (b)  
On the pilot's center panel, push the ALTN FLAPS ARM switch to put the flap system in alternate control. 1) Make sure the expanded flap display comes into view.

 (c)  
Move the ALTN FLAPS EXT/RET switch to the EXT position.

 (d)  
Move the ALTN FLAPS EXT/RET switch to the OFF position when the flaps are at flaps 5 (as shown on EICAS). 1) Make sure the flaps stop at flaps 5.

 (e)  
Move the ALTN FLAPS EXT/RET switch to the RET position. 1) Make sure the LE and TE flaps retract.

 NOTE: LE flaps will not retract until the inboard TE flaps
____
 are fully retracted.

 2)  Make sure the LE flaps retract to within 1 inch maximum of fully faired position.
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747-400 MAINTENANCE MANUAL
 (f)  
Move the ALTN FLAPS EXT/RET switch to the OFF position.

 (g)  
Push the ALTN FLAPS ARM switch to put the system in the usual position. 1) Make sure the LE flaps move to the fully retracted

 position.
 F. Put the Airplane Back to its Usual Condition
 S 865-009
 (1)  
Remove pneumatic power (Ref 36-00-00/201).

 S 865-010

 (2)
Remove systems No. 1 and 4 hydraulic power (Ref 29-11-00/201).

 S 865-011

 (3)  
Remove electrical power (Ref 24-22-00/201).

 TASK 27-81-00-715-100
 3.  Operational Test - Group A Leading Edge Flaps during Reverse Thrust Operation_____________________________________________________________________________
 A. References
 (1)  
24-22-00/201, Manual Control

 (2)  
27-62-00/201, Speed Brake Control System

 (3)  
29-11-00/201, Main Hydraulic System

 (4)  
36-00-00/201, Pneumatic System

 B.
Access

 (1)  
Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 C.
Prepare for Test

 (1)  
Supply electrical power (Ref 24-22-00/201).

 S 865-101
 S 865-107
 WARNING: MAKE SURE PERSONS AND EQUIPMENT ARE CLEAR OF THE LE FLAPS
_______ BEFORE YOU APPLY PNEUMATIC POWER. THE LE FLAPS CAN MOVE AUTOMATICALLY WHEN YOU APPLY PNEUMATIC POWER. THIS OCCUR IF YOU MOVED THE REVERSE THRUST LEVERS OR FLAP CONTROL LEVER WHEN PNEUMATIC POWER WAS OFF.
 (2)  Supply pneumatic power (Ref 36-00-00/201).
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