27-51-39
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 864-097
 (4)  If the aftflap is in the correct position, move the flap control lever to the position of the flaps.
 S 864-098
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU DISARM ALTERNATE CONTROL. THE FLAPS WILL MOVE AUTOMATICALLY TO THE POSITION OF THE FLAP CONTROL LEVER.
 (5)
Push the ALTN FLAPS ARM switch to disarm the alternate control.

 S 864-130

 (6)
Remove the DO-NOT-CLOSE tags and close these circuit breakers.

 (a)  
P415 Power Distribution Center - Right
 1) 415A18 ALT INBD TE FLAPS

 S 864-099
 (7)  Do this task to pressurize hydraulic system No. 1: "Hydraulic System Pressurization" (AMM 29-11-00/201).
 S 864-131
 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.
 (8)  
Extend and retract the flaps slowly.

 (a)  
Make sure the flaps move smoothly.

 S 644-101
 (9)  
Do this task to lubricate the aftflap drive mechanism: "Trailing Edge Flap System Lubrication" (AMM 12-21-20/301).

 G.
Put the Airplane Back to Its Usual Condition

 (1)
Put the flap control lever in the UP detent to retract the flaps.

 S 864-103

 (2)  
Do this task to depressurize hydraulic system No. 1: "Hydraulic System Depressurization" (AMM 29-11-00/201).

 (3)  
Do this task: "Remove Electrical Power" (AMM 24-22-00/201).

 S 864-102
 S 864-104
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 27-51-39
 ALL  ú ú 01 Page 437 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 27-51-39-834-105
 18. Aftflap Drive Mechanism Adjustment
__________________________________
 A. Parts
 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 80 | Bolt (Tracks No. 3 and 6) | 27-51-39 | 04 | 105 | | | | Bolt (Tracks No. 4 and 5) | | 01 | 105 | | | 81 | Washer (Tracks No. 3 and 6) | | 04 | 110 | | | | Washer (Tracks No. 4 and 5) | | 01 | 110 | | | 82 | Nut (Tracks No. 3 and 6) | | 04 | 115 | | | | Nut (Tracks No. 4 and 5) | | 01 | 115 | | | 83 | Bushing (Tracks No. 3 and 6) | | 04 | 145 | | | | Bushing (Tracks No. 4 and 5) | | 01 | 145 | 2......…........…...................................…..........….....….........1
 B. References
 (1)  
AMM 12-21-20/301, Trailing Edge Flap System

 (2)  
AMM 24-22-00/201, Manual Control

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

 C.
Access

 (1)  
Location Zone
 563 Outboard Flap Track Fairing, Inboard Flap, LH
 (Track No. 3)
 561 Inboard Flap Track Fairing, Inboard Flap, LH
 (Track No. 4)
 661 Inboard Flap Track Fairing, Inboard Flap, RH
 (Track No. 5)

 663  Outboard Flap Track Fairing, Inboard Flap, RH (Track No. 6)
 D. Procedure
 S 864-106
 (1)  
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 S 864-107

 (2)  
Move the flaps to the correct position (Fig. 401):

 (a)  
Make sure that the two actuator rods (2) are disconnected from the aftflap.

 (b)  
Make sure the aftflap is attached to the midflap.

 CAUTION:_______DO NOT LET THE AFTFLAP ARMS TOUCH THE MIDFLAP. THEY WILL CAUSE DAMAGE TO THE MIDFLAP.

 (c)  
Make sure the two actuator rods will not move when you move the flaps.

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