(b)
Cracks, chips, delamination or electrical continuities which cause the heat system not to operate.
(c)
If the window conditions agree with the Boeing 737 flight manual conditions, it is not necessary for the heat system to be serviceable.
NOTE: The outer pane is not a structural component. If the windshield warms when heat is applied and you can see clearly through the windshield, then you do not need to replace the windshield.
(2)
Inner Glass Pane
(a)
Cracks of any kind.
(b)
Scratches deeper than 0.015 inch.
(c)
Conchoidal chips in either surface, deeper than 0.015 inch.
(d)
V-shaped chips of any kind.
(3)
Middle Vinyl Pane
(a) Cracks or tears of any kind.
B. Examine Window No. 2 For Delamination
(1) Delamination is the separation of glass pane from adjacent vinyl inner layer. Affected area may be clear but will be cloudy if penetrated by moisture. Electrical heating system may be affected. Since delamination has no affect on the structural integrity of the windshield, the following limits are to be used as approximate guidelines for window replacement. Minor variations from these limits are acceptable providing flight personnel have not indicated that visibility is affected.
(a)
Isolated delamination areas (island delamination) with diameter of 3/4 inch or more and located more than 2 inches from nearest edge.
(b)
Continuous edge delamination which extends 2-1/2 inches or more from the originating edge (top or side), 3-1/2 inches or more top corner radius, 2 inches or more from the bottom edge or 3 inches or more from a lower corner toward the center of the panel.
(c)
Any delamination that is cloudy (indicating moisture between the vinyl and glass).
500
Oct 20/91 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 56-12-11 Page 601
H30757
Window No. 2 (Pilot's Sliding Window) Mechanism Allowable Wear Limits 500
56-12-11 Figure 601 May 15/67
Page 602
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
D. It is permissible for No. 2 windows, with new type of vinyl interlayer, to have a crack in the forward upper corner up to 0.50 inches.
3. Window No. 2 (Pilots' Sliding Window) Check
A. Check for loose or missing fasteners in window frames.
CAUTION: TO REDUCE POSSIBILITY OF WINDOW BREAKING, LOOSE OR REPLACEMENT BOLTS SHOULD NOT BE TIGHTENED MORE THAN 5 POUND-INCHES (FINGER-TIGHT).
B. Check window heating system for correct functioning (Ref Chapter 30, Control Cabin Window Anti-Icing System).
C. Check mechanism for wear, if indicated, as shown in Fig. 601.
500
Aug 01/94 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 56-12-11 Page 603
WINDOW NO. 2 (PILOTS' SLIDING WINDOW) - APPROVED REPAIRS
1. Repair Window No. 2 (Pilots' Sliding Window) Handle Trigger Return Spring (Fig. 801).
A. Open window to take load induced by compressed bulb seal off spring pin through handle and bellcrank shaft.
B. Remove handle from bellcrank shaft by driving out handle spring pin 0.187 inch diameter.
C. Remove trigger bolt from handle by driving out lower spring pin 0.187 inch diameter.
D. Remove trigger return spring from handle by driving out middle spring pin 0.187 inch diameter.
E. Place new trigger return spring in position opposite middle spring pin hole and drive in spring pin.
F. Place trigger bolt in position opposite lower spring pin hole and drive in spring pin.
G. Check trigger for full return when released.
H. Place handle on lower forward bellcrank shaft and drive in spring pin through handle and shaft.
NOTE: This is most easily done with the window open.
544
May 1/74 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 56-12-11 Page 801
H62466
Window No. 2 (Pilot's Sliding Window) Handle 501
56-12-11 Trigger Return Spring Replacement Jun 20/85
Page 802 Figure 801
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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