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the compartment stays above 3% for 195 minutes. The filter
drier uses desiccant granules to remove moisture. It has a filter
to remove squib debris or other contaminants to prevent line
blockage.
Training Information Point
The filter drier has environmental seals on both sides of the
component that rupture upon discharge. A check of the forward
or aft cargo fire extinguishing discharge lines must be done
downstream of the filter drier.
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - FILTER DRIER
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-23-00-009
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - FILTER DRIER
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - FILTER DRIER
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-23-00-009
Functional Description
When you push a cargo fire arm switch, you select the related
squib. If you push the discharge switch for one second, 28v dc
goes to the squib. Then the bottle discharges extinguishing
agent to the related cargo compartment. The bottle provides fire
suppression for 60 minutes.
Pushing the discharge switch starts the 60 minute timer. If the
airplane is in flight, after 60 minutes, the second metered bottle
begins discharging to the same cargo compartment. The two
bottles together provide enough agent to provide over 180
minutes of fire suppression. The discharge system is inhibited if
the airplane lands before the timer 60 minutes are over.
When the pressure in a bottle decreases, the bottle pressure
switch closes and makes a ground. The amber DISCH light
comes on.
Training Information Point
CAUTION: IF THE AIRPLANE LANDS WITHIN 60 MINUTES OF
DISCHARGING THE FIRST EXTINGUISHING
BOTTLE, ALL ELECTRICAL POWER MUST BE
REMOVED FROM THE AIRPLANE OR ALL FIRE
DETECTION/SUPPRESSION CIRCUIT BREAKERS
MUST BE PULLED AND RESET. FAILURE TO
COMPLY WILL ALLOW THE AUTOMATIC
DISCHARGE TIMER TO CONTINUE THE COUNT
DOWN RESULTING IN AUTOMATIC DISCHARGE
OF THE SECOND EXTINGUISHING BOTTLE
DURING THE NEXT TAKEOFF.
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-23-00-007
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - FUNCTIONAL DESCRIPTION
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-23-00-007
Functional Description
The squibs on both fire bottles connect to the EXT lights on the
cargo fire control panel.
The TEST switch on the cargo fire control panel lets you do a
test of both fire bottle squibs. It lets you find a squib fault.
The TEST switch on the cargo fire control panel lets you do a
test of all three fire bottle squibs. It lets you find a squib fault.
If a squib has a fault, the extinguisher light will not come on.
Training Information Point
The lights are press-to-test. The DISCH amber light is not pressto-
test.
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - CARGO FIRE CONTROL PANEL - SQUIB TEST
EFFECTIVITY
GUN ALL 26-23-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-23-00-005
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - CARGO FIRE CONTROL PANEL - SQUIB TEST
FIRE PROTECTION - CARGO COMPT FIRE EXTINGUISHING - CARGO FIRE CONTROL PANEL - SQUIB TEST
EFFECTIVITY
GUN ALL 26-23-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-23-00-005
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26-24-00
Page 1
D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The lavatory fire extinguishing system extinguishes fires under
　
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