(14)
B00170 Mirror Glaze Cleaner, MGH-17
(15)
B00712 Micro-Gloss CleanerReferences
(1)
56-11-21/601, Window No. 3Access
(1)
Location Zone 101/102 Control Cabin
Procedure
S 228-004-B00
(1) Use an optical micrometer to measure the depth of scratches or crazing. Obey the minimum window thickness limits in the inspection/check procedure (Ref 56-11-21) after the repair.
NOTE: If the depth of the scratch or the crazing is more than
____ 0.050 inch, you cannot repair the window.
S 948-005-B00
(2)
Apply masking tape to the window frame and the seal.
S 178-006-B00
(3)
Flush loose dirt from the window.
S 358-007-B00
(4)
Remove small clamshell surface chips, scratches, and surface crazing with abrasive paper or cloth. Use a coarse abrasive paper for gauges, deep scratches, and bad crazing (usually not more than 100 grit).
NOTE: If a small repair is necessary, use a fine abrasive paper to
____ reduce the time to polish the window. Do not try to repair only a local part of the surface area. This will cause visual distortion.
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A
737-300/400/500MAINTENANCE MANUAL
S 178-008-B00
(5) Flush away the grit and acrylic material with water.
NOTE: Use sufficient water to keep the window surface cool.
____
S 358-009-B00
(6)
Rub all the window surface in the horizontal direction. Use a sander that operates at approximately 800 cycles per minute.
S 358-010-B00
(7)
Rub all the window surface in the vertical direction.
NOTE: If you rub with an abrasive paper for 2 to 5 minutes, you
____ will remove approximately 0.005 inches of acrylic. Change the abrasive paper frequently.
S 358-011-B00
(8)
Do the procedure again until all the surface damage is removed and the surface has a constant thickness.
S 358-012-B00
(9)
Rub the window with an abrasive paper for 2 minutes to make sure all the cracks and crazes are removed.
S 148-013-B00
(10)
Polish the window with graduations of abrasive materials (coarse to fine). Use 100-600 grit paper and micromesh cloths of 1600-1800 grit.
S 148-014-B00
(11)
Continue each step until the polish masks are removed (normally 2-3 minutes in each step).
(12)
Move the sander horizontally to polish the window surface.
(13)
Move the sander vertically across the window surface.
S 228-017-B00
(14)
Make sure the window pane thicknesses are equal to or more than the limits permitted in inspection/check procedure (Ref 56-11-21/601).
(15)
Remove the water spray.
S 148-015-B00
S 148-016-B00
S 948-018-B00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 148-019-B00
(16)
Polish the window with buffing compound and a clean muslin or wool pad. If necessary, use coarse and fine compounds to get a glossy finish. If a rotary buffer is used, the wheel surface speed must be 3200 feet per minute for coarse compound and 4200 feet per minute for fine compound.
S 218-020-B00
(17)
Do a check of the window visually for optical quality.
S 358-021-B00
(18)
If the window has damage, repeat the repair process.
S 228-022-B00
(19)
Make sure the window pane thickness is equal or greater than the limits permitted in the inspection/check procedure (Ref 56-11-00) after rework.
S 148-023-B00
(20)
Apply wax to the window surface. Polish the window to a glossy finish.
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