BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TRANSMISSION - REMOVAL/INSTALLATION
___________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is one task for the removal and one task for the installation of a trailing edge flap transmission.
 (1)
The transmission removal procedure has these parts:

 (a)
The extension of the flaps

 (b)
The removal of the flap track fairings

 (c)
The installation of the support equipment

 (d)
The removal of the transmission.

 (2)
The transmission installation procedure has these parts:

 (a)
A check of the transmission for worn parts

 (b)
The installation of the support equipment

 (c)
The installation of the transmission

 (d)
The installation of the flap track fairing

 (e)
An adjustment of the flaps

 (f)
The retraction of the flaps.

 B.  
If you can fully extend the flaps, it is not necessary to remove the movable flap track fairing. If the flaps cannot be fully extended, it can be necessary to remove the fairing. If under abnormal conditions the flaps cannot be adjusted to use the flap lock tools, it is recommended that the movable fairing be removed and that wedges and rope be used to block and hold the flaps to prevent movement.

 C.  
You must disconnect the ball screw from the transmission before you remove the transmission. You can remove the ball screw or keep it installed with the ball screw nut and the ball and screw support tool. If you do not remove the ball screw, you must make index marks on the ball screw and the transmission. You will use the index marks to make sure you install the ball and screw correctly.

 TASK 27-51-33-004-049
 2.  Transmission Removal____________________
 A.  Special Tools and Equipment
 (1)
PF51-009-1 Fishpole Hoist, Pneumatic Powered (Preferred)

 (2)
PF51-003-1 Fishpole Hoist, Manual (Optional to PF51-009)

 (3)
Lifting Strap, (Commercially Available), (Recommended)

 (4)
OHME65B81114-1 Lifting Strap (Alternative)

 (5)
2OHME65B81114-1 Hoisting Point Clamp

 (6)
2MIT65B81117-1 Ball and Screw Support Tool

 (7)
24ME65B00116 Inboard TE Flap Lock

 (8)
23ME65B00116 Outboard TE Flap Lock

 (9)
MIT65B08004 Socket

 B.  
References

 (1)
AMM 24-22-00/201, Manual Control

 (2)
AMM 27-51-26/401 Inboard Flap Track Fairings

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 27-51-33
 ALL  ú ú 01 Page 401 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (3)  
AMM 27-51-31/401 Outboard Flap Track Fairings

 (4)  
AMM 27-51-41/401, Ball Screw

 (5)  
AMM 27-58-01/401, Flap Position Transmitter

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

 (7)  
IPC 27-51-31, Fig. 2

 (8)  
IPC 27-51-31, Fig. 3

 (9)  
IPC 27-51-33, Fig. 1

 (10)
 IPC 27-51-33, Fig. 2

 (11)
 IPC 27-51-33, Fig. 3

 (12)
 IPC 27-51-33, Fig. 4

 C.
Access

 (1)  
Location Zones 567 Outboard Flap Track Fairing, Outboard Flap, LH, (Track No. 1) 565 Inboard Flap Track Fairing, Outboard Flap, LH, (Track No. 2) 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) 665 Inboard Flap Track Fairing, Outboard Flap, RH, (Track No. 7)

 667  Outboard Flap Track Fairing, Outboard Flap, RH, (Track No. 8)
 D. Prepare for the Removal
 S 014-001
 (1)  
Remove the fixed flap track fairing (AMM 27-51-26/401 or AMM 27-51-31/401).

 S 014-002

 (2)  
If it is necessary, remove the movable flap track fairing (AMM 27-51-26/401 or AMM 27-51-31/401).
　
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