56-11-02
ALL ú ú 03 Page 606 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
PASSENGER WINDOWS - DESCRIPTION AND OPERATION
_____________________________________________
1. General (Fig. 1)_______
A. Passenger windows are located between the fuselage frames in those areas of the airplane where passenger seating is provided. The passenger windows consist of outer, middle, and non-structural inner panes. They are designed to preclude fogging and frosting by means of multiple pane construction with intervening cavities essentially isolated from cabin interior air.
2. Windows_______
A. The passenger windows are designed as plug-type windows subject only to the pressure acting on them. The outer and middle panes are secured to the window frame with 10 spring clips. In addition to the spring clips, the forward four windows on each side also have 12 retainer fittings to make them resistant to bird strikes. The window retainer fitting surface contacting the windowpane is coated with a nylon fluidized bedcoating or optional teflon finish to prevent fretting. The outer pane of stretched acrylic plastic, 0.35 inch thick, is rectangular in shape with rounded corners and a beveled outer edge to fit the window frame. The pane is curved to fair with the fuselage contour. The middle pane of modified acrylic plastic sheet, 0.22 inch thick, is similarly shaped but with an unbeveled edge which is seated on the inboard face of the seal/spacer ring. A small breather hole is located near the bottom of the middle pane.
3. Seal____
A. A seal/spacer ring positions both the middle and outer panes in the window frame and seals the outer windowpane to the window frame. It is a molded ethylene propylene seal with staggered beads and an integral masking feature. The middle pane is mounted on the inboard face of the seal/spacer ring. The window retaining clips secure the window in the window frame, compressing the ring to fit tightly against all members to form a pressure seal.
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56-21-00
ALL ú ú 03 Page 1 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
NON-STRUCTURAL INNER PANE
WINDOW
REVEAL
OUTER PANE
MIDDLE PANE
A
747-400 MAINTENANCE MANUAL
PASSENGER WINDOW - REMOVAL/INSTALLATION
_______________________________________
1. General_______
A. This procedure contains these tasks:
(1)
Removal of passenger windows.
(2)
Installation of passenger windows.
B. The data that follows applies to all the passenger windows and plugs, and all the entry door windows.
TASK 56-21-01-004-001
2. Passenger Window Removal (Fig. 401)___________________________________
A. Consumable Materials
(1)
G00191 Maskant - Spraylat SC 1071, protective spray coating
(2)
G00301 Tape - Protective, Gizard Protex 20V
B. Access
(1) Location Zones 211 Passenger Cabin Nose to First Door, Left 212 Passenger Cabin Nose to First Door, Right 223 Fwd Upper Deck Passenger Cabin, Left 224 Fwd Upper Deck Passenger Cabin, Right 225 Aft Upper Deck Passenger Cabin, Left 226 Aft Upper Deck Passenger Cabin, Right 231 Passenger Cabin First to Second Door, Left 232 Passenger Cabin First to Second Door, Right 241 Passenger Cabin Second to Third Door, Left 242 Passenger Cabin Second to Third Door, Right 251 Passenger Cabin Third to Fourth Door, Left 252 Passenger Cabin Third to Fourth Door, Right 261 Passenger Cabin Fourth Door to Sta 2040, Left 262 Passenger Cabin Fourth Door to Sta 2040, Right 271 Passenger Cabin Sta 2040 to Sta 2360, Left 272 Passenger Cabin Sta 2040 to Sta 2360, Right
C. Prepare for the Removal
S 954-003
(1) Apply the protective tape or the spray coating to the window pane areas that you can get access to.
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56-21-01
ALL ú ú 09 Page 401 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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