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Functional Description
The fan pulls in cabin air through the inlet grille and air filter.
The temperature sensor sends the air temperature to the cabin
temperature controller (CTC). The CTC uses this data to
compare with the selected temperature.
Training Information Point
You must clean the cabin temperature sensor air filter
regularly.
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE SENSOR ASSEMBLY
EFFECTIVITY
GUN 101-118 21-60-00
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D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-011
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE SENSOR ASSEMBLY
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE SENSOR ASSEMBLY
EFFECTIVITY
GUN 101-118 21-60-00
Page 9
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-011
Functional description
The flight compartment temperature sensor fan comes on when
115v ac is available and the left pack switch is in AUTO or HIGH.
The passenger compartment temperature sensor fan comes on
when 115v ac is available.
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMP SENSOR FAN - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 101-118 21-60-00
Page 10
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-021
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMP SENSOR FAN - FUNCTIONAL DESCRIPTION
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMP SENSOR FAN - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 101-118 21-60-00
Page 11
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-021
Purpose
The duct temperature anticipator sensor supplies the cabin
temperature controller (CTC) with rate of temperature change
(increase or decrease).
Location
The flight compartment duct temperature anticipator sensor is
in the flight compartment distribution supply duct. The supply
duct is in the EE compartment.
The passenger compartment duct temperature anticipator
sensor is in the passenger overhead distribution duct.
Physical Description
The duct temperature anticipator sensor has a probe body and
an electrical connector end. The sensor is hermetically sealed
with two elements.
Functional Description
The duct temperature anticipator sensor is a variableresistance
type. As temperature increases, the resistance of
the sensor decreases.
The duct temperature anticipator sensor is part of a bridge
circuit in the CTC. It reads the rate of change in the duct air
temperature. The CTC uses this data to adjust the air mix valve
position.
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE ANTICIPATOR SENSOR
EFFECTIVITY
GUN 101-118 21-60-00
Page 12
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-012
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE ANTICIPATOR SENSOR
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE ANTICIPATOR SENSOR
EFFECTIVITY
GUN 101-118 21-60-00
Page 13
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-012
Purpose
The duct temperature limit sensor supplies a signal to the cabin
temperature controller (CTC) when the duct temperature is 140F
(60C) or more.
Location
The flight compartment duct temperature limit sensor is in the
flight compartment distribution supply duct. The supply duct is
in the EE compartment.
The passenger compartment duct temperature limit sensor is in
the passenger overhead distribution duct.
Physical Description
The duct sensor has a probe body and an electrical connector
end. The sensor is hermetically sealed in a metal housing.
Functional Description
The duct temperature limit sensor is a variable-resistance type.
As temperature increases, the resistance of the sensor
decreases.
The duct limit sensor is part of a bridge circuit in the CTC. The
CTC sends a close signal to the air mix valve when the air
temperature in the duct is 140F (60C) or more.
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE LIMIT SENSOR
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