(b)
Let the primer dry a minimum of one hour at 70 degrees F.
(c)
Apply a layer of silicone primer to one nylon cord (No. 2 or 3 window) or two cords (No. 1 window) and let it dry for 30 minutes.
S 828-041
(3) Put the cords in the correct locations:
NOTE: You must complete the steps that follow to put the cords in
____
the correct locations in 2.5 hours.
(a)
For the No. 1 window, put the cord(s) in the correct location(s) (Fig. 801). 1) Fill the full length of the distance between the right and
left windshield with one short cord. 2) Install the other cord with a sufficient length to wind around the three remaining sides of the windshield.
(b)
For the No. 2 and 3 windows, put the cord in the correct location (Fig. 801). 1) Put the cord in the clearance around the window. 2) Push the cord with a thin hand tool. 3) Make a overlap with the two ends 0.5 to 1.0 inch in length
in the upper aft corner. 4) Make sure you push the cord tightly against the frame at all points around the window.
5) Slowly put the aerodynamic smoother in the clearance with a flow gun. Apply more of the aerodynamic smoother than is necessary so you can smooth the edges.
NOTE: You can use a spatula when you can not apply it
____
with a flow gun.
6) Use your fingers to make the aerodynamic smoother a continuous surface with the outer surface of the skin and window.
7) Remove the tape from the edges of the clearance. You can smooth the aerodynamic smoother at the edges of the clearance with a tool. Do not rub the skin or window.
E. Put the Airplane Back to its Usual Condition
S 868-008
(1) Close these circuit breakers and remove the DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) 6B17 WINDOW HEAT 1R
2) 6B34 WINDOW HEAT 1L
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747-400 MAINTENANCE MANUAL
3) 6E28 WINDOW HEAT 2L & 3R PWR 4) 6E30 WINDOW HEAT 2R & 3L PWR
(b) P180 DC Power Distribution Panel
1) 180H12 WDO HEAT CONT 1R
2) 180H26 WDO HEAT CONT 1L
TASK 56-11-00-308-009
3. Repair the Moisture Seal for the No. 1 Window (Fig. 802)_____________________________________________
A. Standard Tools and Equipment
(1)
Spatula or Flow Gun
(2)
Duck Bill Nozzle - Semco No. 8643
B. Consumable Materials
(1)
G00033 Cheesecloth - Woven, Surewipe, clean and lint-free
(2)
B00185 Alcohol - Isopropyl, TT-I-735
(3)
B00083 Solvent - Aliphatic Naphtha, TT-N-95
(4)
G00294 Tape - Masking, Permacel No. 76
(5)
A00103 Sealant - Polysulfide, PR1425, Products Research and Chemical Corporation
(6)
A00908 Sealant - Pro Seal 860, Class B, for low cure rate
(7)
A00247 Sealant - Polysulfide, BMS 5-95 or Pro Seal 860, Class B
(8)
A00474 Smoother - Aerodynamic, Silicone Sealant, Dow Corning DC 93-006
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MAINTENANCE MANUAL
WIPER RAMP
0.16 INCH MAX
0.12 INCH MIN
PLASTIC CHISEL
Moisture Seal Repair
Figure 802 (Sheet 1)
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