(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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 56-11-21
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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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