(11) Cut the fire blocking material 15 inches wide and 36 inches long and install it behind the insulation bat.
NOTE: The material should extend at least two inches past the
____ the insulation stud then wrap around the insulation.
S 834-050
(12)
Cut holes in the fire blocking material to match the existing holes in the insulation then put the material on the insulation stud. The material sections must overlap at least 2 inches with the upper section outboard of the lower section.
S 424-052
(13)
Install the retainer caps.
S 834-068
(14)
Wrap the fire blocking material around the dripshield so that it extends at least 1 inch past the fasteners. Trim excess material.
S 834-053
(15)
Cut holes in the fire blocking material to match the existing holes in the dripshield.
S 394-054
(16)
Apply BMS5-63 sealant to bond the material to the dripshield (SOPM 20-50-19).
NOTE: Sealing tape, BMS 5-146, may be used to hold the fire
____ blocking material in place while the sealant cures. It may be left in place permanently. It cannot be used instead of the sealant.
S 834-055
(17)
Apply a 0.25 inch bead of sealant between the fasteners to bond the material to the dripshield if there is more than 5 inches between fasteners.
(18)
Install the fasteners on the aft edge of the dripshield.
S 424-069
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25-14-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
F. Install Hatch Sensor Access fire blocking
S 024-056
(1)
Remove the sensor access cover and fasteners from the dripshield.
S 164-057
(2)
Clean the access cover and flanges.
S 834-058
(3)
Spiral wrap BMS5-146 tape around the sensor wiring from the connector to 1 inch past where the wiring passes through the dripshield.
S 834-059
(4)
Cut the fire blocking material so that it covers the opening between the inctercostal flanges. The material should overlap the flanges by at least 1 inch.
S 394-060
(5)
Apply BMS5-63 sealant to bond the material to the dripshield (SOPM 20-50-19).
NOTE: Sealing tape, BMS 5-146, may be used to hold the fire
____ blocking material in place while the sealant cures. It may be left in place permanently. It cannot be used instead of the sealant.
S 424-061
(6) Install the sensor access cover and fasteners on the dripshield.
TASK 25-14-01-404-007
4. Install the Dripshields (Fig. 401)
_______________________
A. Standard Tools and Equipment
(1)
Sealant gun
(2)
Spatula or scraper
(3)
Brush, spray or roller applicator
(4)
Sandpaper 180-grit or finer
B. Consumable Materials
(1)
A00552 Adhesive - BAC 5010 type 60
(2)
B00083 Solvent - Aliphatic Naphtha TT-N95
(3)
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261
(4)
G00216 Wipers
C. References
(1)
AMM 24-22-00/201, Manual control
(2)
AMM 25-00-00/801, Equipment/Furnishings
(3)
AMM 25-11-01/401, Pilot's Seat
(4)
AMM 25-11-03/401, Observers Seat
(5)
AMM 25-13-03/401, Pilot's Sunvisor Assembly
(6)
AMM 25-15-02/401, Flight Compartment Crash Pads
(7)
AMM 25-40-03/401, Upper Deck Lavatory
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