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temperature to the pack/zone temperature controllers. The
pack/zone temperature controllers use this data to compare
with the cabin temperature selectors.
Training Information Point
You must clean the cabin temperature sensor air filter
regularly.
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE SENSOR ASSEMBLY
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-817
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE SENSOR ASSEMBLY
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE SENSOR ASSEMBLY
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-817
Purpose
The duct temperature sensor gives duct temperature feedback
to the pack/zone temperature controllers.
Location
There is a flight compartment duct temperature sensor and a
backup duct temperature sensor. They are in the EE
compartment on the left side adjacent to the E2 rack.
There is a forward and an aft passenger cabin duct temperature
sensor. The forward cabin duct temperature sensor is in the
overhead duct forward of the left forward riser. The aft
passenger cabin duct temperature sensor is in the overhead
duct aft of the right riser.
Physical Description
The duct temperature sensor is a single element sensor.
Functional Description
The duct temperature sensor sends the duct temperature to the
pack/zone temperature controller. The pack/zone temperature
controller uses this data to compare with a cabin temperature
selector and cabin temperature sensor.
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE SENSOR
EFFECTIVITY
GUN 001-099, 201-999 21-60-00
Page 56
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-818
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE SENSOR
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE SENSOR
EFFECTIVITY
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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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
21-60-00-818
Purpose
The pack/zone temperature controllers do these functions:
* Control their air conditioning pack
* Give automatic standby control to the opposite air
conditioning pack
* Control two zone trim air control channels
* Control their air conditioning pack ram air actuators
* Provide built-in test equipment (BITE) that isolates faults to
the line replaceable unit (LRU).
Location
The pack/zone temperature controllers are in the EE
compartment on the E3-3 rack.
General Description
The pack/zone temperature controllers are identical and
interchangeable. Their pin interface with the rack identifies
them to the airplane systems.
Each pack/zone temperature controller has these control
channels:
* Flight compartment zone temperature control channel
* Passenger cabin zone temperature control channel
* Auto pack temperature control channel
* Standby pack temperature control channel
* Ram air actuator control channel.
Training Information Point
The pack/zone temperature controllers are electrostatic
discharge sensitive (ESDS) devices. Use ESDS safe handling
techniques.
AIR CONDITIONING - TEMPERATURE CONTROL - PACK/ZONE TEMPERATURE CONTROLLER
EFFECTIVITY
GUN 001-099, 201-999 21-60-00
Page 58
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-813
AIR CONDITIONING - TEMPERATURE CONTROL - PACK/ZONE TEMPERATURE CONTROLLER
AIR CONDITIONING - TEMPERATURE CONTROL - PACK/ZONE TEMPERATURE CONTROLLER
EFFECTIVITY
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Page 59
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-813
Purpose
The trim air check valve prevents reverse airflow in the trim air
supply ducts.
Location
There are two trim air check valves. They are in the aft inboard
area of the ECS bays.
Physical Description
The trim air check valves are split-flapper type check valves.
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