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 (4)  S 014-067Remove the crash pads on both windows (AMM 25-15-02/401).
 (5)  S 014-068Remove the visor track (sunvisor) (AMM 25-13-03/401).
 (6)  S 014-069Remove the No. 3 window sunshade.
 (7)  S 014-070Remove the upper molding commom to aft No. 1, 2 and 3 windows.
 (8)  S 014-071Remove the lower air duct.
 (9)  S 014-059For No. 2 window, do the following: (a) Remove No. 2 sunshade/molding if necessary. (b) Disconnect the two power leads from the terminals (11) at the aft edge of the window.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 014-060
 (10) For No. 3 window, do these steps:
 (a)  
Remove the vertical section of the fiberglass interior lining at the aft edge of the window (STA 340 bulkhead) from approximately WL 340 to 363.

 (b)  
Remove the fasteners.

 (c)  
Remove the sealant on the aft edge of No. 3 window.

 (d)  
Remove the vertical section of the fiberglass dripshield (15) at the aft edge of the window (STA 340 bulkhead) from approximately WL 340 to 363.

 (e)  
Disconnect the two power leads from the terminals (11) at the forward edge of the window.

 S 034-045
 (11) Remove the control thermostat (8) and the spring retainer (7) for the thermostat (AMM 30-41-06/401).
 (a)  
Disconnect the leads.

 (b)  
Remove the control thermostat.

 (c)  
Remove the fasteners that hold the spring retainer assembly, and remove the spring retainer assembly.

 S 034-014
 (12) Remove the overheat thermostat (10) and the retaining spring assembly (AMM 30-41-06/401).
 (a)  
Disconnect the leads.

 (b)  
Remove the overheat thermostat.

 (c)  
Remove the two window bolts that hold the spring retainer assembly, and remove the spring retainer assembly.

 F. Remove the Window.
 S 034-015
 CAUTION:_______PULL THE NYLON CORD SLOWLY. IF YOU PULL THE CORD FAST, YOU CAN BREAK THE CORD.
 (1)  Break the aerodynamic seal (Fig. 402).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 (2)  S 034-046Remove the aerodynamic smoother from the cord in the top aft corner.
 (3)  S 034-047Pull the cord slowly and continuously out until you remove the cord and the smoother.
 (4)  S 034-016Remove the nuts (6), the rubber washers (4), the washers and/or brackets (5), and the bolts (3) from the window (Fig. 401).
 NOTE:____ Make a record of the locations of the wire support brackets and the metal washers.
 (5)  S 024-048Apply hand pressure to the outer side of the window to break the pressure seal.
 NOTE:____ Always apply hand pressure to the largest area possible. Tap the window with a rubber mallet and nonmetallic block if it is difficult to remove. Do not permit the window to fall free when you break the pressure seal. Support the window from the inside to prevent damage to the adjacent structure and the window.
 (6)  S 024-066Carefully remove the window from the window frame.
 NOTE:____ If during replacement of the No. 2 window, an interference fit is found between window being removed and four fasteners through upper aft post structure (No. 3 post), remove and reinstall fasteners, reversing the direction of the head. Always fit and remove windows as squarely as possible, with great care. Bolt holes in windows are easily damaged by impact with stud bolt or retaining nuts.

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