(6)
AMM 27-61-00/501, Spoiler Control System

 (7)
AMM 27-62-00/501, Speed Brake Control System

 (8)
AMM 29-11-00/201, Main Hydraulic Supply System

 (9)
AMM 57-22-01/501, Fixed Trailing Edge Upper Panel

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-51-01
 ALL  ú ú 01 Page 501 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 D. Access
 (1)  
Location Zone
 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)

 (2)  
Access Panels

 On the left side of the airplane: 563BB Outboard Flap Track Fixed Fairing 563CB Outboard Flap Track Movable Fairing 563DB Outboard Flap Track Movable Fairing 563EB Outboard Flap Track Movable Fairing 561AB Inboard Flap Track Fixed Fairing 561BB Inboard Flap Track Movable Fairing 561CB Inboard Flap Track Movable Fairing 561DB Inboard Flap Track Movable Fairing
 On the right side of the airplane: 663BB Outboard Flap Track Fixed Fairing 663CB Outboard Flap Track Movable Fairing 663DB Outboard Flap Track Movable Fairing 663EB Outboard Flap Track Movable Fairing 661AB Inboard Flap Track Fixed Fairing 661BB Inboard Flap Track Movable Fairing 661CB Inboard Flap Track Movable Fairing 661DB Inboard Flap Track Movable Fairing
 E. Prepare To Adjust The Inboard Flaps
 S 865-002
 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 (Ref 29-11-00/201).

 S 865-004

 (3)  
Put the speed brake control lever in the UP detent to lift spoilers No. 5 thru 8 above the inboard flap.

 S 865-003
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 27-51-01
 ALL  ú ú 01 Page 502 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 495-005
 (4)  
Install the spoiler actuator locking tools or move the FLT CONTROL HYD POWER switches to SHUTOFF to prevent retraction of the spoilers.

 S 865-006

 (5)  
Release the pressure in hydraulic systems No. 1 and 4
 (Ref 29-11-00/201).

 S 015-007

 (6)  
Remove the flap track fairing access panels

 -563BB, 563CB, 563DB, and 563EB (Track No. 3)
 -561AB, 561BB, 561CB, and 561DB (Track No. 4)
 -661AB, 661BB, 661CB, and 661DB (Track No. 5)
 -663BB, 663CB, 663DB, and 663EB (Track No. 6).
 S 285-008
 CAUTION: MAKE SURE THAT THE AFTFLAP IS LATCHED TO THE MIDFLAP WHEN YOU
_______
 OPERATE THE FLAPS. THE FLAPS CAN BE DAMAGED.

 DO NOT LET THE AFTFLAP EXTEND TO WHERE THE AFTFLAP ARMS HIT THE MIDFLAP. THE MIDFLAP CAN BE DAMAGED.
 (7)  
If the inboard flap adjustment is to be done after a midflap has been installed:

 (a)  
Make sure the aft roller supports are not installed.

 (b)  
Make sure the aftflap mechanisms are installed.

 (c)  
Make sure the two geneva cams are attached to the carriages.

 F.
Adjust the Inboard Flaps at the Downstop

 S 225-009
 (1)  Measure the distance between the ballscrew nut and the ballscrew downstop (Dimension Y, Fig. 501).
 NOTE: Dimension Y must be equal on the two flap ballscrews.
____
 S 865-010
 (2)  
Supply electrical power (Ref 24-22-00/201).

 S 835-011
　
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