20-10-12
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A
757 MAINTENANCE MANUAL
PRESSURE-SENSITIVE DECALS - APPROVED REPAIRS
____________________________________________
1. General_______
A. This procedure contains one task. The task is the repair of external decals.
B. You can repair damaged external decals with patches of decals that are almost the same. You must replace damaged internal decals.
TASK 20-10-12-358-001
2. Repair the External Decals__________________________
A. References
(1) AMM 20-10-12/401, Pressure-Sensitive Decals
B. Procedure
S 038-002
(1)
Cut and remove all loose decal film but be careful not to cut the airplane skin.
S 808-003
(2)
Cut a patch of decal film of the same type and color as the initial decal. Make the patch of sufficient size to make a 1/4-inch overlap on the part of the decal that is not damaged.
(3)
To apply the patch (AMM 20-10-12/401).
S 398-005
(4)
Seal the edges all around the repair. Use the edge sealer specified in AMM 20-10-12/401.
S 438-004
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20-10-12
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757 MAINTENANCE MANUAL
PRESSURE-SENSITIVE PLACARDS - REMOVAL/INSTALLATION
__________________________________________________
1. General
_______
A. This procedure contains one task. The task is the replacement of interior vinyl placards.
B. Vinyl placards do not easily make a good fit on the contour of a rough or textured surface. The placards will touch only the high spots and have an unsatisfactory bond. You will use an adhesive to get a smooth surface that will give the placard a firm bond.
TASK 20-10-13-964-001
2. Replace the Placard
___________________
A. Consumable Materials
(1)
B00048 Detergent Cleaner - Spraywhite E
(2)
B00036 Freon TF
(3)
B00083 Aliphatic Naphtha - TT-N-95
(4)
A00119 Adhesive - BMS 5-55
(5)
A00016 Adhesive Film - BMS 5-91
(6)
B00137 Sandpaper, medium grit
(7)
G00270 Masking tape
B. Remove the Placard
NOTE: If the used placard is attached firmly and the new placard is the
____ same size, you can install the new placard on the used placard.
S 034-002
(1)
Put a sharp knife or equivalent object under the edge of the placard and remove the placard from the adhesive area.
S 114-003
(2)
Use naphtha or Freon TE, Isopropyl alcohol, or Ethyl alcohol to remove adhesive from the surface.
C. Prepare the Placard for Installation
S 804-004
(1)
If the placard has a mark that shows BMS 5-91 adhesive is used, no special placard preparation is necessary. Do the installation.
S 804-005
(2)
If the placard has no backing adhesive, prepare the placard as follows:
(a)
Use sandpaper to make the rear surface of the placard rough.
(b)
Clean the placard with naphtha cleaner.
(c)
Remove the release paper from one side of the BMS 5-91 adhesive film and apply to the rear of the placard. Remove unwanted film.
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757 MAINTENANCE MANUAL
(d) Bond the adhesive film to the placard with one of these steps:
NOTE: This step loosens the bond between the adhesive and the
____ release paper. Be careful not to let the release paper move.
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