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20-11-08
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A
747-400 MAINTENANCE MANUAL
PRESSURE-SENSITIVE DECALS - REPAIRS
___________________________________
1. General_______
A. This procedure contains one task. THe task is to repair external decals.
B. To repair damaged external decals, apply patches of equivalent decals. Replace damaged internal decals.
TASK 20-11-08-358-006
2. Repair External Decals______________________
A. References
(1) AMM 20-11-08/401, Pressure-Sensitive Decals
B. Consumable Materials
(1)
A00000 Sealer - Edge, 4150, 3M Company
(2)
A00000 Sealer - Edge, Koppers Vinyl 401, Koppers Co., Inc.
(3)
A00000 Sealer - Edge, 683-3-2, Sikkens
(4)
A00000 Catalyst - Sealer, Edge, X-310, Sikkens
C. Procedure
S 038-002
(1)
Cut away 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 sure it is of sufficient size to make an overlap of 1/4 inch on the part of the decal that is not damaged.
(3)
Apply the patch (AMM 20-11-08/401).
S 438-004
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747-400 MAINTENANCE MANUAL
TEFLON BACKUP RINGS - REMOVAL/INSTALLATION
__________________________________________
1. General_______
A. This procedure contains one task. The task is the installation of the teflon backup ring.
TASK 20-11-09-094-003
2. Install the Teflon Backup Ring______________________________
A. Procedure
S 424-002
(1) Install split-teflon backup rings with the direction of the spiral clockwise. Make sure the scarfed ends face as shown in Fig. 401.
(SHOWN LARGER THAN USUAL)
Teflon Backup Ring Installation
Figure 401
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20-11-09
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747-400 MAINTENANCE MANUAL
STENCIL MARKINGS - CLEANING/PAINTING
____________________________________
1. General
_______
A. This procedure contains one task. The task is the installation of stencil markings.
B. For decorative finishes used on airplane external surfaces, refer to "Decorative Exterior Finishes" (AMM 51-21-02/701).
C. Paint used for markings is specified by the surface you will paint and the type of finish necessary. Paint must agree with the initial surface finish.
D. In areas where an hydraulic fluid-resistant finish is necessary, apply BMS 10-11, Type II enamel.
E. Areas where no finish is required, apply BMS 10-60 enamel.
F. When letter sizes are less than two inches in height and width, use BMS 10-60 enamel for the letters.
NOTE: When you use BMS 10-60, Type II on painted or not painted
____
surfaces, use BMS 10-79, Type II primer.
G. For markings applied directly on corogard EC 843 or EC 843S, use EC 942 black.
TASK 20-11-10-207-013
2. Install Stencil Markings
________________________
A. General
(1)
Make sure clean surfaces do not become dirty when you clean adjacent surfaces.
(2)
Use a polyethylene wash bottle to apply solvents. Identify contents.
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