S 392-078
(4)
Apply more of the aerodynamic smoother, if it is necessary, to make the edges around the seal smooth.
NOTE: Because of shrinkage, you must apply the aerodynamic
____ smoother again, approximately 8 hours apart, to fill the clearances.
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MAINTENANCE MANUAL
Aerodynamic Sealer
Figure 206 (Sheet 1)
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MAINTENANCE MANUAL
SLOT WIDTH AND DEPTH
WIDTH "A" (INCHES) WIDTH "B" (INCHES)
0.02 - 0.03 0.03 - 0.05 0.05 - 0.10 0.10 - 0.15 0.10 MAXIMUM 0.25 MAXIMUM 0.50 MAXIMUM 0.75 MAXIMUM
Aerodynamic Sealer
Figure 206 (Sheet 2)
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747-400 MAINTENANCE MANUAL
S 392-079
(5)
Use a spatula to make the seal smooth with the masking tape.
S 952-080
(6)
Remove the masking tape after the seal is smooth or let the masking tape stay during the curing time.
S 392-081
(7)
Make the edges of the seal smooth. Remove all the unwanted compound with a wooden or plastic tool.
TASK 51-31-01-392-082
10. Electrical Fitting Seal Application___________________________________
A. General
(1) BMS 5-37 sealant is the recommended sealant for the electrical seal fittings. BMS 5-26, BMS 5-32, and BMS 5-95 sealants will do the same function as the BMS 5-37. But, BMS 5-26, BMS 5-32, and BMS 5-95 are not the recommended sealants because they will bond to electrical wires which do not have a teflon coating. For wires that are not teflon coated it is not easy to do maintenance on electrical seal fittings that have sealant bonded to the electrical wires. For wires with a teflon coating do not use BMS5-37, use BMS5-26.
B. Equipment
(1)
Fillet Fairing Tools
(2)
Sealant Removal Tool - made from wood or
plastic 3/16 inch thick, 8 inches long in 1/4,
1/2 and 3/4 inch widths.
(3)
Spatula made of wood or plastic
(4)
Sealing gun and nozzles
C. Consumable Materials
(1) G00138 Masking Tape - Permacel No. 70 or 85,
American Tuck No. 210; 3/4-inch wide and
1 1/2-inch wide
D. Procedure
S 302-083
(1)
Do the Prepare for Sealing task.
(2)
Put the wire bundle through an available cutout.
S 422-096
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MAINTENANCE MANUAL
S 412-097
(3) Isolate the wires before you apply the seal:
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