25-50-07
 ALL  ú ú 01 Page 405 ú Dec 20/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 CARGO COMPARTMENT LINING (FIBERGLASS) - APPROVED REPAIRS
________________________________________________________
 1.  General_______
 A.  The cargo compartment lining must be repaired to keep the compartment class C smother type category.
 B.  The repairs that follow are for the fiberglass liners on the vertical and sloping sidewalls, ceiling, and bulkheads in the cargo compartments:
 (1)  
The repair of loose or damaged tape.

 (2)  
The permanent repairs for the flat or slightly curved liners.

 (3)  
The repairs for the molded panels, shrouds, and panels with complex curves.

 (4)  
The repairs for the neoprene-coated liners.

 (5)  
The repairs for the silicone impregnated liners.

 C.  These are the permanent repair alternatives for flat or slightly curved liners.
 (1)  
It is not necessary to remove the liners from the airplane for these permanent repairs. It is necessary to make sure that underlying is not contacted by screws when repair procedure (a) is used.

 (a) The use of screws with a bonded fiberglass patch.

 (2)  
It is not necessary to remove the liners for these permanent repairs:

 (a)
The Thermion Repair System which uses a bonded patch.

 (b)
The Akro Fireguard System which uses a bonded patch.

 (3)  
If the permanent repairs done to the cargo liners are not one of the above alternatives, you can install mechanical fasteners around the edges of the existing patches. Refer to one of the first two permanent repair procedures for the fastener installation. If you can remove the old patch, such as a temporary repair, you can install a bonded patch over the original damage. Refer to one of the last two permanent repair procedures for the installation of a bonded patch.

 TASK 25-50-09-358-009
 2.  Repair Loose or Damaged Tape____________________________
 A.  Consumable Materials
 (1)  Tape
 NOTE: Use one of these tapes:
____
 (a)  
G00348 Permacel - Glass Cloth, Flame Resistant, P621

 (b)  
G02101 Permacel - Glass Cloth, Flame Resistant, P212HD

 (c)  
G01338 3M 367-FR (Preferred)

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 25-50-09
 ALL  ú ú 03 Page 801 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 B. Access
 (1)  Location Zones
 121/122 Forward Cargo Compartment
 153/154 Aft Cargo Compartment

 C. Procedure
 S 028-001
 (1)  
Remove and discard all loose or damaged tape.

 S 118-002

 (2)  
Clean the damaged area with a clean cheesecloth that is moist with solvent.

 S 168-015

 (3)  
Dry the area with a clean dry cheesecloth before the solvent dries.

 S 168-016

 (4)  
Clean the area again to fully remove the dirt, oil paint, and other unwanted materials.

 NOTE: A clean surface is necessary for a good bond.
____
 S 428-003
 (5)  Install new tape.
 NOTE:____Do not use tape again. If you use the tape again, it will not have a satisfactory bond.
 TASK 25-50-09-348-012
 3.  Permanent Repairs to Flat or Slightly Curved Liners___________________________________________________
 A. General
 (1)  
The permanent repairs contain four alternatives. It is only necessary to use one of the four alternatives.

 (2)  
Use the applicable consumable materials that are necessary for the repair procedure you use.

 B. Equipment
 (1)  
Glass or metal container (commercially
 available)

 (2)  
Knife or scissors (commercially available)

 C. Consumable Materials
 (1)  Abrasive paper (80-grit) - commercially available
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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