747-400
MAINTENANCE MANUAL
SEE A
FORWARD CARGO COMPARTMENT
BOTTLE A, M7906
BOTTLE B, M7907
BOTTLE C, M7908
BOTTLE D,FORWARD CARGO
M6742 AFT CARGOCOMPARTMENT COMPARTMENT
FWD
AFT CARGO COMPARTMENT
SQUIB ASSEMBLIES
FIRE EXTINGUISHER BOTTLES
A
Lower Cargo Compartment Fire Extinguisher Bottle
Discharge Cartridge (Squib) Check
Figure 601
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A
747-400 MAINTENANCE MANUAL
S 426-005
(4) If you removed the squib, install it (Ref 26-23-02/401).
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A
747-400 MAINTENANCE MANUAL
REGULATOR - REMOVAL/INSTALLATION
________________________________
1. General_______
A. The regulators are installed in the right side of the ceiling in the forward cargo compartment and the aft cargo compartment.
B. The removal/installation procedure is the same for each regulator.
TASK 26-23-03-004-001
2. Remove the Regulator (Fig. 401)____________________
A. References
(1) IPC 26-23-02 Fig. 01
B. Access
(1) Location Zones 124 Forward Cargo Container Compartment Aft Half 142 Aft Cargo Container Compartment R.H.
C. Procedure
S 864-002
(1) Open this circuit breaker on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tag:
(a) 6H6, FIRE EXTINGUISHER LOWER CARGO
S 014-003
(2)
Get access to the regulator.
S 034-004
(3)
Disconnect the tubing from the inlet and outlet of the regulator.
S 034-005
(4)
Loosen the top side of the jam nut.
S 034-006
(5)
Remove the two top nuts and washers which connect the top of the support bracket to the regulator washer.
S 034-007
(6)
Remove the two bottom bolts and washers which connect the bottom support of the bracket to the regulator.
S 024-008
(7)
After the regulator is loose, pull the regulator body out of the U-shaped top support bracket.
S 934-009
(8)
If you will use the regulator again, make a mark (arrow) that shows the flow direction on the regulator.
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A
747-400
MAINTENANCE MANUAL
SEE A
REGULATOR
WASHER
NUT (2 LOCATIONS)
BRACKET ASSEMBLY
LOCK WASHERLOCK WASHER WASHERWASHER BOLTBOLT
REGULATOR (EXAMPLE)
A
Regulator Installation Figure 401
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A
747-400
MAINTENANCE MANUAL
TASK 26-23-03-404-010
3. Install the Regulator (Fig. 401)
_____________________
A. References
(1)
AMM 26-23-00/501, Lower Cargo Fire Extinguishing System
(2)
IPC 26-23-02 Fig. 01
B. Access
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