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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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
26-16-00-002
FIRE PROTECTION - CARGO COMPARTMENT SMOKE DETECTION - GENERAL DESCRIPTION
FIRE PROTECTION - CARGO COMPARTMENT SMOKE DETECTION - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 26-16-00
Page 7
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-16-00-002
Component Location
The lower cargo compartments have many cargo smoke
detectors and one cargo electronic unit in each compartment.
The forward lower cargo compartment has four smoke
detectors. The aft lower cargo compartment has six smoke
detectors. The detectors are in the ceiling of the compartments.
You remove a protective guard to get access to a smoke
detector.
One cargo electronic unit is in the ceiling on the left side of each
cargo compartment, inboard of the cargo door.
You remove a cover to get access to a cargo electronic unit.
FIRE PROTECTION - CARGO COMPARTMENT SMOKE DETECTION - COMPONENT LOCATION
EFFECTIVITY
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Page 8
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-16-00-004
FIRE PROTECTION - CARGO COMPARTMENT SMOKE DETECTION - COMPONENT LOCATION
FIRE PROTECTION - CARGO COMPARTMENT SMOKE DETECTION - COMPONENT LOCATION
EFFECTIVITY
GUN ALL 26-16-00
Page 9
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-16-00-004
Purpose
The smoke detectors monitor air in the forward and aft lower
cargo compartments for smoke and heat.
Location
The smoke detectors are in pans in the ceiling of the forward
lower cargo compartment and in the aft lower cargo
compartment.
Physical Description
The forward and aft smoke detectors are the same. The smoke
detectors have these components:
* Electrical connector
* Smoke detection chamber (internal)
* Electronic circuit (internal).
Functional Description
The smoke detectors use photoelectric cells to detect smoke.
The smoke detector gives an alarm signal if it senses smoke or
if it senses air temperature more than 230F (110C).
FIRE PROTECTION - LWR CARGO COMPARTMENT SMOKE DETECTION - SMOKE DETECTOR
EFFECTIVITY
GUN ALL 26-16-00
Page 10
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-16-00-005
FIRE PROTECTION - LWR CARGO COMPARTMENT SMOKE DETECTION - SMOKE DETECTOR
FIRE PROTECTION - LWR CARGO COMPARTMENT SMOKE DETECTION - SMOKE DETECTOR
EFFECTIVITY
GUN ALL 26-16-00
Page 11
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-16-00-005
Purpose
The cargo electronic units monitor the forward and aft lower
cargo compartment smoke detectors.
Physical Description
The forward and aft cargo electronic units are identical. The
cargo electronic units have these items:
* Two electrical connectors (at back of unit)
* 16 red light emitting diodes (LEDs)
* Lamp test switch
* System test switch
* Electronic circuits (internal)
General Description
There are four smoke detectors (two in loop A and two in loop
B) in the forward cargo compartment. Red LED lights on the
front of the CEU labeled 1A, 1B, 2A and 2B connect to smoke
detectors. The remaining LED lights are active and connect
externally by a jumper cable loop.
There are six smoke detectors (three in loop A and three in loop
B) in the aft cargo compartment. Red LED lights on the front of
the CEU labeled 1A, 1B, 2A, 2B, 3A and 3B connect to smoke
detectors. The remaining LED lights are active and connect
externally by a jumper cable loop.
Training Information Point
The cargo electronic unit is an LRU. There is no scheduled
maintenance of the cargo electronic units.
FIRE PROTECTION - LWR CARGO COMPARTMENT SMOKE DETECTION - CARGO ELECTRONIC UNIT
EFFECTIVITY
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Page 12
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
26-16-00-006
FIRE PROTECTION - LWR CARGO COMPARTMENT SMOKE DETECTION - CARGO ELECTRONIC UNIT
　
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