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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
NOTE:
Method to Measure the Depth of the Crazing
Figure 601
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A
737-300/400/500MAINTENANCE MANUAL
1) The maximum depth of a crazing around the routed edge is
0.012 inch.
NOTE: The crazing can be continuous around the radius of
____
the pane.
2) The maximum depth of a crazing in an area with delaminations is 0.005 inch.
S 216-013-B00
CAUTION:_______REPLACE THE MIDDLE PANE IF IT HAS A DELAMINATION. THE FAILSAFE PROPERTY OF THE PANE IS GONE.
(5) Examine the window for delaminations (in-plane cracks).
(a) A delamination of the outer pane is permitted at the edge if it is in these limits (Fig. 602).
FAR EDGE OF THE
PROPYLENE SEAL
WINNDOW PANE
Joint of Acrylic Pane with Window Frame Forging
Figure 602
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737-300/400/500MAINTENANCE MANUAL
(b)
The maximum distance from the edge of the pane is 0.20 inch.
(c)
The maximum length at the edge of the window is 0.50 inch.
(d)
The minimum distance between delaminations is 1.00 inches.
(e)
A maximum of 2 delaminations are permitted in the outer pane.
(f)
The maximum depth at the routed edge is 0.012 inch.
NOTE: A delamination at the routed edge can be continuous.
____
(g) A delamination in the routed edge can have a depth of 0.025 inch for a maximum length of 0.25 inch. The crazing in the area must have a depth of less than 0.005 inch.
S 026-007-B00
(6) Replace the outer pane if the delaminations and chips are larger than these limits:
NOTE: Delaminations in the outer pane, other than at the edge, are
____
usually with chips.
(a)
The maximum permitted chip depth is 0.025 inch.
(b)
The maximum dimension of a delamination is 0.25 inch in diameter.
(c)
The minimum distance between delaminations is two times the maximum damage diameter.
S 216-008-B00
(7) Examine the window panes for scratches.
(a) Replace the pane if scratches are larger than these limits (Ref 56-31-00/401):
NOTE: Some scratches can be polished or buffed out
____
(Ref 56-31-00/801).
It is not necessary to polish small scratches less than
0.002 inch depth (not easily felt with a fingernail).
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737-300/400/500MAINTENANCE MANUAL
Scratch Depth Max. Length One Scratch Max. Total Length
0.01 inch 0.50 inch 2.5 inches
0.005 inch 1.5 inches 4.0 inches
S 216-009-B00
(8) Examine the window for chips.
NOTE: Surface and V-shaped chips are not permitted in the center
____ pane. Shell type chips less than 0.03 inch are permitted.
(a) Refer to step (4) for the limits of chips in the outer pane.
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