(b)  
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

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

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

 S 714-019
 CAUTION:_______CAREFULLY MONITOR THE FLAP MOVEMENT. THIS CAN PREVENT DAMAGE TO EQUIPMENT FROM INCORRECT ADJUSTMENT.
 (9)  
Retract and extend the LE flaps electrically with the LE flaps fully extended at the end.

 (10)
 Make sure that the LE flaps operate smoothly and move freely.

 S 214-046
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 224-020
 (11) If you replaced flap No. 6 or 21, do a check of the distance between the flap and nacelle fairing (Section A-A, Fig. 402):
 (a)  Make sure the LE flaps are fully extended.
 (b)  Remove the flap to nacelle seal if it is necessary.
 (c)  Measure the dimension A and the clearance (Section A-A and
 Detail A, Fig. 402).
 (d)  At each of the dimensions A given  below, make sure the
 clearance between the flap and nacelle fairing is as given.
 NOTE:____ The clearance increases as Dimension A increases.
 Dimension A  Flap to Nacelle
 Inches  Fairing - Clearance
 (| 0.12)___________  Inches (| 0.12)_______________
 0.00  0.55
 3.00  0.55
 15.62  0.60
 28.25  0.70
 29.00  0.70
 (e)  Cut the outboard edge of the flap to get the specified
 clearance.

 S 374-021
 (12)
 Do this task to repair the finish on the edge of the flap: "Conductive Coating System Application for the Exterior Fiberglass" (AMM 51-24-03/701).

 S 424-022

 (13)
 Install the flap (63) to the nacelle seal.

 S 034-023

 (14)
 Remove the stop access screws (56).

 S 824-047

 (15)
 Turn the adjustable screws (58) to get the maximum distance from the upstop pads (55).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 864-024
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE FLAPS
_______ BEFORE YOU MOVE THE REVERSE THRUST LEVERS. THE ENGINE THRUST REVERSER SLEEVES WILL OPEN IN 1-1/2 SECONDS AND CLOSE IN 4-1/2 SECONDS WHEN YOU OPERATE THE LEVERS. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (16) Do this task to pressurize hydraulic systems No. 1 and 4: "Hydraulic System Pressurization" (AMM 29-11-00/201).
 NOTE: Hydraulic power is not necessary if you use the reverse
____
 thrust levers to retract and extend the flaps.

 S 864-025
 (17) Do this task: "Supply Pneumatic Power" (AMM 36-00-00/201).
 S 864-044
 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.
 (18)
 Move the flap control lever to full UP detent to retract the LE flaps pneumatically.
　
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