747-400 AMM 飞机维护手册 WINDOWS 窗户/风挡(23)

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 NOTE: Chips are flakes or layers of glass broken from surface.
____ Chips have a rough or grained appearance and are readily detectable. There are two types of chips: conchoidal and V-shaped. Conchoidal chips are usually circular or curved in shape with many fine striations that follow the outline of the outer edge. These chips are not normally detrimental to the structural integrity of the glass. V-shaped chips have a sharp narrow "V" shape which appears to propagate toward interior of glass. These chips occur only rarely in chemically tempered glass; however, such V-shaped chips may initiate a future window failure.
 (a)  Replace the window if the chips are in the inner or outer glass panes of the window (AMM 56-11-02/401).
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 S 216-005
 (5)  Examine the windows for delamination.
 NOTE: Delamination is a separation of the glass or acrylic panes
____ from the vinyl interlayer. Delaminations can be seen if the window is examined at an angle in light that does not shine directly on the window. The delamination is seen as a shiny, flat bubble. They usually looks smooth, although there can be some distortion around the perimeter.
 Do not confuse a delamination with the layers which are not aligned with each other. The interlayer is not bonded to the clear plastic tape around the edges of the window.
 Delaminations at the coating surface are seen as shiny blue, gold, or brown areas with reflected light. Delaminations at the coating surface are seen as brownish areas with transmitted light.
 Delaminations do not cause structural failure of the window assembly. Remove a window with delamination if it limits your visual capacity. Delaminations at the coating surface can cause the anti-icing system not to operate. The outer glass ply can crack if the anti-icing system does not operate correctly.
 S 216-006
 (6)  Examine the window for bubbles.
 NOTE: The small bubbles in the vinyl core are not a delamination
____
 and are not structurally dangerous.

 (a)  Replace the window if the visual capacity is limited
 (AMM 56-11-02/401).

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GLASS PANE (INNER)
GLASS PANE (INNER)
NO. 2 AND 3 WINDOW NO. 2 AND 3 WINDOW PREFIX P SERIAL NUMBER PREFIX T SERIAL NUMBER (PPG WINDOW) (TRIPLEX WINDOW) A-A A-A
No. 2 and 3 Window (Windshield) Figure 601
H40513
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 (b)  Make sure the control system of the window heat operates correctly (AMM 30-41-00/501).
 S 216-007
 (7)  Examine the moisture seal for deterioration and cracks. (a) Repair the seal if it is necessary (AMM 56-11-00/801).
 S 216-008
 (8)  Examine the window for the loose or cracked aerodynamic smoother. (a) Repair the smoother if it is necessary (AMM 56-11-00/801).
 S 866-009
 (9)  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 WDO HEAT CONT 1R 2) 180H26 WDO HEAT CONT 1L
 S 736-010

 (10) Do a test of the window heating system to make sure it operates correctly (AMM 30-41-00/501).
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