(5)  
Lavatories, 25-40-00, provides information on all lavatories within the main and upper deck passenger compartments exclusive of the toilet units.

 (6)  
Cargo and Accessory Compartments, 25-50-00, provides information on electrical/electronic equipment racks and partitions in accessory compartments, items for handling and securing cargo, and insulation and lining of cargo areas.

 (7)  
Emergency Equipment, 25-60-00, provides information on all escape and life saving equipment installed throughout the airplane.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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A
747-400 MAINTENANCE MANUAL
 EQUIPMENT/FURNISHINGS - APPROVED REPAIRS
________________________________________
 1.  General_______
 A.  This procedure contains instructions to do approved repairs on the following items:
 (1)  
Crushed-core and sandwich panels.

 (2)  
Decorative surfaces.

 (3)  
Decorative Tedlar Removal/Installation

 (4)  
Nomex honeycomb sandwich panels with a decorative tedlar cover.

 (5)  
Tedlar covers of aluminum laminates.

 (6)  
Perforated panels.

 (7)  
Polycarbonate (Lexan), ULTEM, and Declar plastics.

 (8)  
Urethane foam.

 (9)  
Insulation blankets and covers.

 (10)
 Aluminum trim.

 TASK 25-00-00-308-047
 2.  Repair Crushed-Core and Sandwich Panels________________________________________
 A.  General
 (1)  
This procedure gives instructions to repair crushed-core and sandwich panels that have these types of damage:

 (a)  
Small scratches and dents

 (b)  
Large dents in thin crushed-core panels

 (c)  
Small holes and gouges

 (d)  
Damage that is more than 0.5 square inch but has no core damage

 (e)  
Damage that is more than 0.5 square inch with core damage

 (2)  
Make sure the area you want to repair is smaller than 100 square inches. If the area is larger than 100 square inches, you must replace the part.

 B.  Standard Tools and Equipment
 (1)  
Heat Gun - 1200 to 1500 watts

 (2)  
Saw - Hole

 C.  Consumable Materials
 (1)  Adhesives
 (a)  
D00437 Filler - BMS 5-136, Ad Tech 15-3

 (b)  
A00216 BMS 5-28, Epocast 1618A/B

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 (c)  
A00292 BMS 5-105, Type II, Class I, EC
 3532A/B

 (d)  
A00905 BMS 8-201, Type II

 (2)  
B00083 Solvent - Aliphatic Naphtha, TT-N-95

 (3)  
B00168 Paper - Abrasive, 400-600 grit

 (4)  
G00034 Cheesecloth - Lint-free

 (5)  
G00077 Foam - BMS 8-133

 (6)  
G00129 Fabric - Woven prepreg glass, BMS 9-3

 (7)  
G02480 Tape - Mylar, Permacel No. P-255

 D. References
 (1) 20-11-25/201, Heat Guns, Soldering Guns, and/or Soldering Irons
 E. Access
 (1)  Location Zone
 200 Upper Half of the Fuselage

 F. Repair Small Scratches and Dents
 NOTE: Use this procedure to repair panels that have damage that does
____
 not go into the fiberglass or carbon skins.

 For panels that are 0.25-inch thick or more, use this procedure to repair scratches and small surface dents that are not more 0.10-inch deep. For panels that are less than 0.25-inch thick, use this procedure to repair scratches and small surface dents that are not more than 0.005-inch deep.
 S 348-048
 (1)  
　
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