757
MAINTENANCE MANUAL

BLANKET INSULATION  EXTERIOR SKIN 
DRIPSHIELD 
INBD  B  MATERIAL FIRE BLOCKING  BLANKET INSULATION EXTERIOR SKIN 
B  DRIPSHIELD 
TRACK WINDOW 
A-A  MATERIAL FIRE BLOCKING 
(2 LOCATIONS) STUD INSULATION 
TRACK WINDOW  (63.5 |2.54 mm) 0.25 |0.10 INCH 
B-B 
Figure 401 (Sheet 2) Fire Blocking Installation 

M95984
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A 757 MAINTENANCE MANUAL
0.65 INCH (16.51 mm)
2.0 -0.5/+1.0 INCHES
(50.8 -12.7/+25.4 mm)
INSULATION 
FWD 
B RIGHT SIDE IS OPPOSITE) (LEFT SIDE IS SHOWN, SIDEWALL AREA AIRPLANE SKIN 
INSULATION  FASTENER INSULATION 
FRAME  FWD 
(LEFT SIDE IS SHOWN, RIGHT SIDE IS OPPOSITE) C-C INBD  MATERIAL BLOCK FIRE 
Figure 401 (Sheet 3) Fire Blocking Installation 

M95993
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A

757
MAINTENANCE MANUAL

INSULATION
SEE

(EXAMPLE)

Fire Blocking Installation
Figure 401 (Sheet 4)

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M96041
A

757
MAINTENANCE MANUAL

INSULATION
FASTENER
0.85 INCH
(21.59 mm) MINIMUM
FIRE BLOCK MATERIAL
0.85 INCH
(21.59 mm) SEE CMINIMUM
FWD AFT EDGE (TYPICAL FOR INSULATION OVER THE FRAME CAP) E-E
INSULATION
FASTENER
0.85 INCH
(21.59 mm)
MINIMUM

FIRE BLOCK MATERIAL
0.85 INCH
(21.59 mm) SEE CMINIMUM
FWD
AFT EDGE
(TYPICAL FOR INSULATION
NOT OVER THE FRAME CAP)
E-E

Fire Blocking Installation
Figure 401 (Sheet 5)

M96064
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A

757
MAINTENANCE MANUAL

 S 024-023
 (6)  
Remove air conditioning ducts to gain access to the aft edge of the dripshield if it is necessary (AMM 21-22-00/001).

 S 024-024

 (7)
Remove the flight deck zone temperature sensor (AMM 21-61-08/401).

 S 024-025

 (8)  
Remove the overhead lining panels as required to get access to the dripshields.

 S 024-026

 (9)  
Disconnect the electrical connectors from the bracket next to the circuit breaker panel.

 S 024-027

 (10)
 Remove the connector bracket.

 S 024-028

 (11)
 Lower the circuit breaker breaker panel doors at the aft edge of the overhead panel to gain access to the dripshield.

 E. Install the flight deck window fire blocking
 S 164-002
 (1)  
Clean the dripshield.

 S 834-004

 (2)  
Cut the fire blocking material to the necessary size.

 S 834-005

 (3)
Trim fire blocking material to provide a 0.25 inch (6.35 mm) gap between the edge of the material and the airplane structure.

 (4)  
Install insulation stud.

 S 424-034
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