FLAP ACTUATOR

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Flap Actuator Installation
Figure 401 (Sheet 1)

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747-400
MAINTENANCE MANUAL

BL 0

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10.57 |0.010 INCHES (268.5 |0.25 mm) WHEN THE FLAP CONTROL LEVER IS IN THE UP POSITION.
Flap Actuator Installation
Figure 401 (Sheet 2)

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747-400 MAINTENANCE MANUAL
 S 714-015
 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.
 (3)  
Make sure the flap actuator operates.

 (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
 (4)
Put the flap control lever in the UP detent to retract the flaps.

 E.
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
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747-400 MAINTENANCE MANUAL
 INBOARD AFTFLAP DRIVE MECHANISM - REMOVAL/INSTALLATION
______________________________________________________
 1.  General_______
 A.  There are 17 tasks in this procedure. There are tasks for the removal and the installation of the components of the inboard aftflap drive mechanism. There is also a task to adjust the aftflap drive mechanism.
 B.  There are removal and installation procedures for these components:
 (1)
The Midflap Crank

 (2)
The Pushrod

 (3)
The Actuator Rod

 (4)
The Midflap Crank Attach Fitting

 (5)
The Geneva Cam

 (6)
The Upstop Fitting

 (7)
The Aftflap Fitting

 (8)
The Aft Roller Support

 C.  
When you remove or install the midflap crank, the pushrod, the actuator rod, and the midflap crank attach fitting, it is necessary to remove or install one or more of the others.

 D.  
You can remove and install the geneva cam, the upstop fitting, the aftflap fitting and the aft roller support independently of all other components.

 E.  
The aftflap drive mechanism adjustment has these parts:

 (1)
A movement of the inboard flaps
　
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