747-400 AMM 飞机维护手册 机翼 WINGS(50)

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 D.  The inboard access (pressure relief) panels are assemblies of the wing leading edge. The panels are installed inboard of the Krueger flaps, on the bottom of the wing.
 E.  The forward and aft edges of the retaining plate hold the pressure relief panel in its position.
 TASK 57-31-03-004-001
 2.  Panel Removal (Fig. 401)________________________
 A.  Access
 (1)  Location Zone
 511 Leading Edge to Front Spar, Left
 611 Leading Edge to Front Spar, Right

 B.  Procedure
 S 024-002
 (1)  Remove the panel
 (a)  
Loosen the screws that hold the two aft retaining plates and the pressure relief panel together, but do not remove the screws.

 (b)  
Remove the screws that hold the pressure relief panel and the two forward retaining plates together.

 NOTE: The screw removal from the forward retaining plates will
____ cause the top retaining plate and the 2 shims to move down into the wing. Be careful when you remove the panel because the shims and the top retaining plate may fall down.
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ACCESS PANEL, INBOARD LEADING EDGE, 611FB
PANEL
SEE

RELIEF PANEL
SEALANT APPLIED TO THE SKIN JOINT (EXAMPLE)
A
747-400
MAINTENANCE MANUAL

THE PANEL

(EXAMPLE)
BOTTOM AFT
FWD

RETAINING PLATE
PRESSURE RELIEF PANEL

WING STRUCTURE

SHIM (ROTATED 90` CW) A-A
Wing Leading Edge Pressure Relief Panel Installation Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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MAINTENANCE MANUAL

 (c)  
Remove the forward retaining plate at the bottom.

 (d)  
Pull the forward edge of the panel down and away from the wing skin.

 (e)  
Move the panel forward to release the aft edge of the panel from the aft retaining plates.

 (f)  
Remove and keep the forward retaining plate at the top and the shims you removed from the inner part of the wing.

 TASK 57-31-03-404-003
 3.  Panel Installation__________________
 A. Consumable Materials
 (1)  
B00184 Solvent - Presealing Cleaning, BMS 11-7

 (2)  
B00624 Compound - Lubricant BMS 3-28

 (3)  
A00099 Sealant - Silicone, RTV154

 B. References
 (1)  
AMM 06-09-08/201, Wing Access Doors and Panels

 (2)  
AMM 20-51-01/201, Standard Torque Values

 C. Access
 (1)  Location Zone
 511 Leading Edge to Front Spar, Left
 611 Leading Edge to Front Spar, Right

 D. Procedure
 S 424-004
 (1)  Install the Panel
 NOTE: To install the two shims and the top retaining plate, you
____ will have to get access through access panel 611 FB. This installation will require 2 people. One person will install the screws, and the other person will hold the shims and top retaining plate in position.
 (a)  
Before you install the panel, remove the remaining sealant from the wing structure and the panel.

 (b)  
Make sure that you loosen the screws from the aft retaining plate.

 (c)  
Put the aft end of the panel into the space between the aft retaining plates at the top and bottom.

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MAINTENANCE MANUAL

 (d) Open access panel 611 FB.
　
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