C.  
A piece of all three of the flap parts have an abrasion resistant teflon layer for protection. If a repair to the teflon layer is necessary, see AMM 51-24-04/701, Abrasion Resistant Teflon Finish System.

 D.  
Separation of the forward bogie from the flap carriage is not required for flap removal because the inboard flap track geometry allows carriage and bogie to be removed as an assembly. Bogie removal is not recommended because of the inherent danger to personnel.

 TASK 27-51-01-004-001
 2.  Inboard Flap Removal____________________
 A.  Special Tools and Equipment
 (1)  
10OHME65B00116 Trailing Edge Flap Spreader Bar

 (2)  
11ME65B00116 Inboard Midflap Strongback (Part of Inboard Trailing Edge Flap Strongback Kit 18ME65B00116)

 (3)  
G27001-1 Spoiler Actuator No. 5 and 8 Locking Tool

 (4)  
2MIT65B81117-1 Ball and Screw Support

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 ALL  ú ú 01 Page 401 ú Feb 18/01
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A
747-400
MAINTENANCE MANUAL

 B. Standard Tools and Equipment
 (1)  
Load Positioner (For 2000 Pounds (900 kg)), 3734T52,
 McMaster-Carr P.O. Box 54960, Los Angeles, California 90054

 C.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 27-51-02/401, Inboard Foreflap

 (3)  
AMM 27-51-26/401, Inboard Flap Track Fairings

 (4)  
AMM 27-51-44/401, Inboard Flap Track Fairing Support

 (5)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (6)  
AMM 57-22-01/501, Fixed Trailing Edge Upper Panel

 (7)  
AIPC 27-51-06, Fig. 1

 D.
Access

 (1)  
Location Zone
 577 Inboard Flap Midflap, LH
 677 Inboard Flap Midflap, RH

 (2)  
Access Panel 577ET Midflap Inboard Trailing Edge Flap Carriage, LH 577BT Midflap Inboard Trailing Edge Flap Carriage, LH 677ET Midflap Inboard Trailing Edge Flap Carriage, RH 677BT Midflap Inboard Trailing Edge Flap Carriage, RH

 E.
Prepare for Removal (Fig. 401).

 S 864-002
 WARNING: OPEN THE CIRCUIT BREAKERS TO PREVENT RETRACTION OF THE
_______ SPOILERS. THE SPOILERS WILL RETRACT AUTOMATICALLY IF YOU USE THE SPEED BRAKE LEVER TO LIFT THE SPOILERS AND IF HYDRAULIC SYSTEM NO. 1 AND 4 ARE NOT PRESSURIZED. INJURY TO PERSONS CAN OCCUR IF THE SPOILERS RETRACT.
 (1)  
Open the 7G6 SPEED BRAKE AUTO CONT circuit breaker on the P7 overhead circuit breaker panel.

 (2)  
Pressurize hydraulic systems No. 1 and 4 (AMM 29-11-00/201).

 (3)  
Lift spoilers No. 5 thru 8 above the inboard flap.

 S 494-005

 (4)  
Install the locking tools for the spoiler actuators or move the FLT CONTROL HYD POWER switches to SHUTOFF to make sure that the spoilers will not retract.

 S 864-003
 S 864-004
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MAINTENANCE MANUAL

Inboard Flap Installation
Figure 401 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 
747-400 
MAINTENANCE MANUAL 
3. CAM TRACK 
2. BOLT  4. WASHER 
FOREFLAP 
MAIN  FLAP TRACK 
CARRIAGE 
5. NUT 
MIDLFAP  A  FORWARD BOGIE 
AFT  SEE  F 
BOGIE 
A  6. STOP FITTING 
　
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