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A
747-400 MAINTENANCE MANUAL
 S 216-006
 (5)  Examine the windshield for bubbles.
 NOTE: The small bubbles in the vinyl layer are not
____ delaminations nor are they structurally dangerous. The bubbles can be an indication that there is a problem with the heater control system. Do a check of the heater control system for that window (AMM 30-41-00/501).
 (a)  Replace the windshield if the bubbles decrease the visual quality (AMM 56-11-01/401).
 S 216-007
 (6)  Examine the moisture seal for deterioration and cracks.
 (a)  Repair the moisture seal if necessary (AMM 56-11-00/801).
 S 216-008
 (7)  Examine the windshield for a loose or cracked aerodynamic smoother.
 (a)  Repair the aerodynamic smoother if necessary (AMM 56-11-00/801).
 S 866-009
 (8) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  
P6 Main Power Distribution Panel
 1) 6B34 WINDOW HEAT 1L
 2) 6B17 WINDOW HEAT 1R
 3) 6E28 WINDOW HEAT 2L & 3R PWR
 4) 6E30 WINDOW HEAT 2R & 3L PWR

 (b)  
P180 DC Power Distribution Panel
 1) 180H12 WD0 HEAT CONT 1R
 2) 180H26 WD0 HEAT CONT 1L

 

 TASK 56-11-01-216-010
 3.  Examine the No. 1 Window (Windshield) for the Correct Installation__________________________________________________________________
 A. References
 (1)  
AMM 30-41-00/501, Flight Compartment Window Anti-Icing System

 (2)  
AMM 30-42-00/501, Windshield Wiper System

 (3)  
AMM 56-11-01/401, Flight Compartment No. 1 Window (Windshield)

 B. Access
 (1)  Location Zone 221 Flight Compartment, Left - Flight Compartment Windows 222 Flight Compartment, Right - Flight Compartment Windows
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 C. Procedure - Examine the Windshield Installation
 S 216-011
 (1)  Examine the windshield installation for loose fasteners or fasteners that are not in the window frame.
 NOTE: The loose fasteners can cause water leakage.
____
 (a)  Tighten the loose fasteners from 50 to 70 pound-inches (AMM 56-11-01/401).
 S 716-012
 (2)  
Examine the window heater system for the correct operation
 (AMM 30-41-00/501).

 S 736-013

 (3)  
Examine the windshield wipers for the correct operation
 (AMM 30-42-00/501).

 

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 ALL  ú ú 03 Page 606 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 NO. 2 AND 3 WINDOWS - REMOVAL/INSTALLATION
__________________________________________
 1.  General_______
 A. This procedure contains the following tasks:
 (1)  
Removal of the No. 2 and 3 windows.

 (2)  
Installation of the No. 2 and 3 windows.

 TASK 56-11-02-004-001
 2.  No. 2 and 3 Windows Removal (Fig. 401)___________________________
 A. General
 (1)  The removal procedures for the right and the left No. 2 and 3 windows are the same. To remove the No. 3 window you must remove a part of the vertical sidewall lining.
 B. Consumable Materials
 (1)  
G00139 Tape - Protective, Gizard Protex 20V

 (2)  
G00191 Maskant - Spraylat SC-1071, (protective spray coating)

 (3)  
G00294 Tape - Masking, Permacel No. 76

 C. References
 (1)  
AMM 25-15-02/401, Crash Pads

 (2)  
AMM 30-41-06/401, Control and Overheat Thermostats

 D. Access
 (1)  Location Zone 221 Flight Compartment, No. 2 and 3 Left Side Windows 222 Flight Compartment, No. 2 and 3 Right Side Windows
　
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