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SWITCH - DISCH, S3  1  1 FLT COMPT, P5, FIRE CONTROL MODULE M7326  * 
SWITCH - TEST 1, S1  1  1 FLT COMPT, P461, SQUIB TEST MODULE, M7327 * 
SWITCH - TEST 2, S2  1  1  FLT COMPT, P461, SQUIB TEST MODULE, M7327  * 
SWITCH - LINE BTL A AND B PRESS, S1890  2  1 124, FWD CARGO COMPT, DISCH LINE * 

* SEE WDM EQUIPMENT LIST
Lower Cargo Compartment Fire Extinguishing System - Component Index Figure 101
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A

747-400
FAULT ISOLATION/MAINT MANUAL

FLIGHT COMPARTMENT

SQUIB TEST 1 SWITCH, S1
SQUIB TEST 2 SWITCH, S2

SQUIB TEST MODULE, M7327 (REF)

Lower Cargo Compartment Fire Extinguishing System - Component Location

Figure 102 (Sheet 1)

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C79816
A
747-400 FAULT ISOLATION/MAINT MANUAL
FILTER/DRIER REGULATOR
SEEF G SHT 4
LOWER CARGO FIRE 
EXTINGUISHER BOTTLES, 
M6742,M7906,M2807,M7908 
SEE  C 
BOTTLE 
SEE D M6742 EXT BOTTLE D, CARGO FIRE SHT 3  SEE D SHT 3 CARGO FIRE M7908 EXT BOTTLE C, FILLER PORT/ SAFETY RELIEF  SEE D SHT 3 M7907 EXT BOTTLE B, CARGO FIRE  SHT 3SEE D M7906 EXT BOTTLE A, CARGO FIRE  FILLER PORT/ SAFETY RELIEF SWITCH (REF) PRESSURE 

BOTTLE
BOTTLE
BOTTLE
BOTTLE
D
C
B
A
BOTTLE
GROUND LUG
PRESSURE
ASSEMBLY
SWITCH (REF)
LOWER CARGO FIRE EXTINGUISHER BOTTLES, M6742,M7906,M7907,M7908 C Lower Cargo Compartment Fire Extinguishing System - Component Location Figure 102 (Sheet 2)
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A
747-400
FAULT ISOLATION/MAINT MANUAL

PRESSURE

GROUND
CARTRIDGE)
LUG (REF)
SQUIB DISCHARGE ASSEMBLY

Lower Cargo Compartment Fire Extinguishing System - Component Location
Figure 102 (Sheet 3)

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A
747-400 FAULT ISOLATION/MAINT MANUAL

REGULATOR

Lower Cargo Compartment Fire Extinguishing System - Component Location
Figure 102 (Sheet 4)

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747-400 MAINTENANCE MANUAL
 LOWER CARGO COMPARTMENT FIRE EXTINGUISHING SYSTEM - ADJUSTMENT/TEST
___________________________________________________________________
 1.  General_______
 A.  This section contains an operational test and system tests for the lower cargo fire extinguishing system.
 (1)  
The operational test makes sure the system will operate correctly. The operational test uses only test equipment installed on the airplane.
　
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