(1)  
D00013 Grease - MIL-G-23827

 (2)  
C00432 Primer - BMS 10-11, Type 1

 D.  
References

 (1)  
24-22-00/201, Manual Control

 (2)  
27-81-00/201, Leading Edge Flap System

 (3)  
27-81-07/401, Variable Camber Flaps Rotary Actuator

 (4)  
29-11-00/201, Main Hydraulic System

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MAINTENANCE MANUAL

 (5)  
36-00-00/201, Pneumatic System

 E.
Access

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

 F.
Prepare for Adjustment

 S 865-013
 (1)  
Supply electrical power (Ref 24-22-00/201).

 S 865-014

 (2)  
Supply pneumatic power (Ref 36-00-00/201).

 S 865-015

 (3)
Supply systems No. 1 and 4 hydraulic power (Ref 29-11-00/201).

 G.
Adjust the Variable Camber Flaps (Fig. 503).

 S 865-073
 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 AND PNEUMATIC POWER REMOVED, THE LE AND TE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
 CAUTION: MAKE SURE TO OPERATE THE POWER DRIVE UNIT PNEUMATICALLY TO THE
_______ ADJUSTED POSITION. ELECTRICAL OPERATION OF THE POWER DRIVE UNIT DURING THE ADJUSTMENT TEST CAN CAUSE DAMAGE TO THE POWER DRIVE UNIT.
 CAUTION: MAKE SURE YOU LOWER THE INBOARD FAN COWL PANELS AND INBOARD
_______ REVERSER HALVES FOR NO. 1 AND 4 ENGINES BEFORE LE FLAP OPERATION. THIS CAN PREVENT DAMAGE TO THE ENGINE COWLING OR THRUST REVERSER HALVES.
 CAUTION: MAKE SURE TO EXTEND THE FLAPS PNEUMATICALLY DURING THE
_______ ADJUSTMENT OF THE LE FLAPS. THE FLAPS WILL NOT EXTEND FULLY IF YOU EXTEND THE FLAPS ELECTRICALLY. THIS WILL CAUSE AN INACCURATE ADJUSTMENT TEST AND STRUCTURAL DAMAGE CAN OCCUR.
 (1)  Move the flap control lever to the 5 unit detent to extend the LE flaps.
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747-400 MAINTENANCE MANUAL
 S 865-017
 (2)  
Remove pneumatic power (Ref 36-00-00/201). S 495-018

 THE LOCKS CORRECTLY.

 (3)  
Deactivate the extended leading edge flaps and install safety locks (Ref 27-81-00/201).

 S 865-019

 (4)  
If it is necessary to adjust all the LE flaps operated by one PDU, make sure to install the correct PDU.

 WARNING:_______ MAKE SURE TO INSTALL THE SAFETY LOCKS AS SPECIFIED IN THE
 PROCEDURE BELOW.  FAST MOVEMENT OF THE LE FLAPS CAN CAUSE
 INJURY TO PERSONS OR DAMAGE TO EQUIPMENT IF YOU DO NOT INSTALL

 NOTE: The correct PDU has a stroke setting of 88.7 turns on the
____ identification plate.
 S 835-076
 (5)  Disconnect the drive shafts to adjust the linkage.
 S 095-094
 WARNING: MAKE SURE TO REMOVE THE SAFETY LOCKS AS SPECIFIED IN THE
_______ PROCEDURE BELOW. FAST MOVEMENT OF THE LE FLAPS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT IF YOU DO NOT REMOVE THE LOCKS CORRECTLY.
 (6)  
Remove the safety locks and reactivate the leading edge flaps (Ref 27-81-00/201).

 S 025-093

 (7)  
Turn the rotary actuator sufficiently to remove the drive shaft if a difference occurs between these flaps:

 (a)  
LE flaps No. 1E and 1

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 27-81-00
　
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