S 398-025

 (13)
 If the seal has cracks, put the sealant, PR1425, in the cracks.

 S 358-035

 (14)
 Use your fingers that are wet with aliphatic naptha to make the sealant smooth.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 948-036
 (15)
 Carefully remove the tape.

 S 948-037

 (16)
 Use a cheesecloth that is moist with aliphatic naphtha to remove the unwanted sealant from the glass or window frame.

 S 398-026

 (17)
 After the sealant dries, cut the edge of the ring with a knife.

 S 398-027

 (18)
 Put a bead of silicone sealant around the wiper ramp (Fig. 802).

 E. Put the Airplane Back to its Usual Condition
 S 868-028
 (1) Close these circuit breakers and remove DO-NOT-CLOSE tags:
 (a)  
P6 Main Power Distribution Panel
 1) 6B17 WINDOW HEAT 1R
 2) 6B34 WINDOW HEAT 1L
 3) 6E28 WINDOW HEAT 2L & 3R PWR
 4) 6E30 WINDOW HEAT 2R & 3L PWR

 (b)  
P180 DC Power Distribution Panel
 1) 180H12 WDO HEAT CONT 1R
 2) 180H26 WDO HEAT CONT 1L

 TASK 56-11-00-308-038
 4.  Repair the Cushion Seal for the No. 1 Window____________________________________________
 A. General
 (1)  The cushion seal prevents too much clamp-up during the assembly and can come out of its installed position during the operation.
 B. Procedure
 S 358-029
 CAUTION:_______BE CAREFUL WHEN YOU CUT THE CUSHION SEAL. IF YOU ARE NOT CAREFUL, DAMAGE TO THE SURFACE OF THE WINDSHIELD CAN OCCUR.
 (1)  Cut the part of the cushion seal that comes out if it is necessary to make the installation look better.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 FLIGHT COMPARTMENT NO. 1 WINDOW (WINDSHIELD) -
______________________________________________ REMOVAL/INSTALLATION
____________________
 1.  General_______
 A.  This procedure contains two tasks. The first task is the removal of the right and left No. 1 windows. The second task is the installation of the right and left No. 1 windows.
 B.  This procedure refers to the No. 1 window as the windshield.
 TASK 56-11-01-004-001
 2.  Remove the Windshield (Fig. 401)_____________________
 A.  Special Tools and Equipment
 (1)  20HME65B07630, Windshield Handling Sling
 B.  Standard Tools and Equipment
 (1)  
Crane equipped with 40-foot boom and capable of lifting 500 pounds

 (2)  
Mobile mechanical lift (capable of extending to a height of 35 feet) or overhead crane capable of lifting 500 pounds

 (3)  
Three 5/16-inch T-bolts with 5/16-18UNC thread (CL-2-CP clamping pins without collar, Carr Lanes Manufacturing Company, 4200 Krause Court, St. Louis, Missouri 63119)

 C.  Consumable Materials
 (1)  
G00139 Tape - Protective, Gizard Protex 20V

 (2)  
G00294 Tape - Masking, Permacel No. 76

 D.  References
 (1)  AIPC 56-11-01, Fig. 1
 E.  Access
 (1)  Location Zone
 221 Flight Deck, Left
 222 Flight Deck, Right

 F.  Prepare for the Removal of the Windshield
 S 864-073
 (1)  
Put the window heat switches in the OFF position.

 S 864-003

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  P6 Main Power Distribution Panel
 1) 6B17 WINDOW HEAT 1R

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