S 862-012

 (8)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P6, Main Power Distribution Panel
 1) 6L20, TE FLAP ELEC CONT INBD
 2) 6L19, TE FLAP ELEC CONT OTBD

 S 712-013
 (9)
Do the control module adjustment/test (AMM 27-51-09/501).

 S 412-014

 (10)
 Install the coverplate (17):

 (a)  
Apply a thin layer of grease to the gasket.

 (b)  
Put the coverplate in its position on the flap power package.

 (c)  
Install the 10 screws (18) to attach the coverplate.

 S 412-015
 (11)
 Install the spring cover (16):

 (a)  
Put the spring cover into the hole.

 (b)  
Clean the spring cover with solvent.

 (c)  
Apply a bead of sealant around the edge of the cover.

 (d)  
Apply primer to the surface if it is necessary.

 TASK 27-51-10-002-016
 4.  Flap Control Bypass Valve Removal_________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
AIPC 27-51-09, Fig. 1 and 3

 B.
Access

 (1)  
Location Zone
 137 Body Landing Gear Well, LH
 138 Body Landing Gear Well, RH

 C.
Prepare for the Removal

 (1)
Make sure that the landing gear ground locks are installed.

 S 492-017
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 27-51-10
 ALL  ú ú 01 Page 207 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 492-018
 WARNING: CAREFULLY DO THE SPECIFIED TASK TO INSTALL THE DOOR LOCKS ON
_______ THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  
Install the door locks on the doors for the body landing gear (AMM 32-00-30/201).

 S 862-019

 (3)  
Release the pressure in hydraulic systems No. 1 and No. 4 (AMM 29-11-00/201).

 S 862-020

 (4)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6, Main Power Distribution Panel
 1) 6L20, TE FLAP ELEC CONT INBD
 2) 6L19, TE FLAP ELEC CONT OTBD

 D.
Remove the Bypass Valve

 S 032-084
 (1)  
Disconnect the bypass valve electrical connectors (3).

 (a)  
DV138 (Inboard Flap By-Pass Valve)

 (b)  
DV139 (Outboard Flap By-Pass Valve)

 S 022-085
 (2)  
Remove the bypass valve:

 (a)  
Remove the screws (28) and washers (29).

 (b)  
Remove the bypass valve (4) from the flap control module (7).

 (c)  
Install a protective plug in the hole in the flap control module.

 TASK 27-51-10-402-022
 5.  Flap Control Bypass Valve Installation______________________________________
 A. Consumable Materials
 (1)  
G00062, Fluid - Hydraulic, Fire Resistant, BMS 3-11

 (2)  
D00054, Lubricant - Assembly, Skydrol, MCS 352

 B. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 4 | Bypass Valve | 27-51-09 | 01 | 175 | | | 7 | Control Module | | | 130 | 2......…........…...................................…...........….....…........1
 C. References
 (1)  AMM 24-22-00/201, Manual Control
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 27-51-10
 ALL  ú ú 03 Page 208 ú Jun 18/01
　
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