(3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 27-51-09/501, Flap Power Package

 (5)  
AMM 27-51-20/401, Flap Torque Tube

 (6)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (7)  
AMM 32-00-30/201, Landing Gear Door Locks

 (8)  
AIPC 27-51-08, Fig. 1

 C.
Access

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

 D.
Procedure

 S 124-023
 (1)  
Do this task to clean the forward bulkhead for a good electrical bond: "Hand Clean Metal Surfaces With Abrasives" (AMM 20-11-14/701).

 S 424-024

 (2)  
Install the flap control input lever assembly (Fig. 401):

 (a)  
Put the input lever assembly in its position. Help the control rod through the center bulkhead.

 (b)  
Install the shims in the correct sequence.

 (c)  
Attach the housing to the center bulkhead with four bolts, washers, and nuts.

 (d)  
Attach the housing to the forward bulkhead with two bolts and washers.

 S 284-012
 (3)  
Do this task to measure the bonding resistance between the bolts and the forward bulkhead: "Check Electrical Bonding" (AMM 20-22-01/601). The resistance must not be more than 0.001 ohm.

 (4)  
Connect the electrical connector.

 S 434-025

 (5)  
Connect the control rods to the flap power packages:

 (a)  
Put the rods in their position.

 S 434-013
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 01 Page 405 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (b)  Install the bolts, washers, bushings and nuts.
 S 424-027
 (6)  
Do this task: "Torque Tube Installation" (AMM 27-51-20/401).

 S 824-028

 (7)
Do this task: "Flap Power Package Adjustment" (AMM 27-51-09/501).

 E.
Do a Test of the Input Lever Assembly

 S 864-015
 (1)  Do this task to pressurize hydraulic systems No. 1 and 4:
 "Hydraulic System Pressurization" (AMM 29-11-00/201).

 S 714-026
 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.
 (2)  
Do the input lever assembly operational test:

 (a)  
Move the flap control lever from the UP detent to the 30-unit detent. Stop at each detent position to permit the flaps to move to the correct position.

 (b)  
At each position, make sure the EICAS caution message FLAPS does not come into view.

 (c)  
At each position, make sure the flap position indicator agrees with the position of the flap control lever.

 S 864-017
 (3)
Put the flap control lever in the UP detent to retract the flaps.

 F.
Put the Airplane Back to Its Usual Condition

 S 094-018
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY, THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Do this task: "Removal of the Door Locks from the Body Landing Gear" (AMM/32-00-30/201).

 (2)  
Do this task: "Remove Electrical Power" (AMM 24-22-00/201).

 S 864-020

 (3)  
Do this task to depressurize hydraulic systems No. 1 and 4:
 "Hydraulic System Depressurization" (AMM 29-11-00/201).

 S 864-019
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-51-35
 ALL  ú ú 01 Page 406 ú Oct 18/00
　
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