C. Prepare to install the fire blocking.
 S 024-029
 (1)  Remove the applicable flight deck furnishings.
 D. Install the forward edge left and right dripshield fire blocking,
 S 164-030
 (1)  
Clean the dripshield.

 (2)  
Cut the fire blocking material to it's appropriate size.

 S 834-031
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747-400 MAINTENANCE MANUAL
 S 834-032
 (3)  Wrap the fire block material around the dripshield and insulation so that it overlaps the dripshield at least one inch.
 NOTE: The material should extend at least 4 inches between the
____ insulation on the structure and the insulation on the dripshield.
 S 394-038
 (4)  Apply 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 834-034
 (5)  
Cut a strip of silicone foam to approximately 1 inch square and approximately 36 inches long.

 S 834-035

 (6)  
Wrap glass fabric one and a half times around the foam strip.

 NOTE: The end of the glass fabric should extend past the end of
____
 the foam strip approximately one inch.

 S 834-036
 (7)  
Insert the foam roll between the material and the structure
 insulation. Trim to fit.

 S 394-037

 (8)  
Apply BMS5-63 sealant to tack the foam roll to the fire blocking material.

 E. Install the aft edge dripshield fire blocking,
 S 834-039
 (1)  
Clean the dripshield.

 (2)  
Cut the fire blocking material to it's appropriate size.

 S 834-040
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747-400 MAINTENANCE MANUAL
 S 834-041
 (3)  Wrap the fire block material around the dripshield and insulation so that it overlaps the dripshield at least one inch.
 NOTE: The material should extend at least 4 inches between the
____ insulation on the structure and the insulation on the dripshield.
 S 394-042
 (4)  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 834-043
 (5)  
Cut a strip of silicone foam to approximately 1 inch square and approximately 36 inches long.

 S 834-044

 (6)  
Wrap glass fabric one and a half times around the foam strip.

 NOTE: The end of the glass fabric should extend past the end of
____
 the foam strip approximately one inch.

 S 834-047
 (7)  
Apply BMS5-146 tape in 2 inch strips to hold the material in place during installation.

 S 834-045

 (8)  
Insert the foam roll between the material and the structure insulation. Trim to fit.

 S 394-046

 (9)  
Apply BMS5-63 sealant to tack the foam roll to the fire blocking material.

 (10)
 Remove the retainer caps from the insulation studs.

 S 024-048
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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