S 414-056

 (2)  
Close the bulk cargo door (Ref 52-36-00/001).

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747-400 MAINTENANCE MANUAL
 BULK COMPARTMENT INSULATION - REMOVAL/INSTALLATION
__________________________________________________
 1.  General_______
 A.  This procedure contains these tasks:
 (1)  
The removal of the insulation blankets from the bulk cargo compartment.

 (2)  
The installation of the insulation blankets.

 B.  The insulation blankets attach to the airplane structure with clips, stud fasteners, velcro tape, and double-back tape. Dacron cord is used in the bottom of the lower lobe to support the insulation blankets above the fuselage skin. The instructions in this procedure are given for an example insulation blanket.
 TASK 25-55-03-004-022
 2.  Bulk Cargo Compartment Insulation Removal (Fig. 401)_________________________________________
 A.  References
 (1)  
25-55-01/401, Bulk Compartment Cargo Restraint and Divider Nets

 (2)  
25-55-02/401, Bulk Compartment Ceiling and Sidewall Linings

 (3)  
52-36-00/001, Bulk Cargo Door

 B.  Access
 (1)  Location Zones
 145 Bulk Cargo Compartment, Left
 146 Bulk Cargo Compartment, Right
 147 Area Below Bulk Cargo Compartment, Left
 148 Area Below Bulk Cargo Compartment, Right

 C.  Prepare for the Removal
 S 014-023
 (1)  
Open the bulk cargo door (Ref 52-36-00/001).

 S 014-034

 (2)  
Remove the cargo restraint nets and compartment divider net if it is necessary (Ref 25-55-01/401).

 S 014-002

 (3)  
Remove the sidewall linings to get access to the insulation blankets behind the linings (Ref 25-55-02/401).

 S 014-003

 (4)  
Remove the floor panels to get access to the insulation blankets under the bulk compartment floor.

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747-400 MAINTENANCE MANUAL
SIDEWALL LINING PANEL (REF) INSULATION SEE C BLANKET (TYP)
SEE A
A
SEE B
CARGO
A
INSULATION
DOORWAY
BLANKET (TYP) B SEEDE B FWD
BULK CARGO COMPARTMENT
C
C VELCRO TAPE
OUTBD FRAME
INSULATION
FWDBLANKET
A
NUT
CLIP (TYP) 
SEE  G 
SCREW  INSULATION 
BLANKET  NUT  SCREW 
A-A 
CLIP  STRUCTURE 
SEE  G 

STUD NUT FRAME
SEE G INSULATION BLANKET
CLIP
INSULATION VELCRO
BLANKET  INSULATION
TAPE BLANKET
B-B C-C Bulk Cargo Compartment Insulation Installation Figure 401 (Sheet 1)
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747-400
MAINTENANCE MANUAL

STABILIZER

G
FWD

FWD

D
Bulk Cargo Compartment Insulation Installation Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
　
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