S 034-029
 CAUTION:_______DO NOT LOWER THE PANEL MORE THAN NECESSARY. IF YOU LOWER THE PANEL MORE THAN NECESSARY, YOU CAN CAUSE DAMAGE TO THE FLEXIBLE DUCT THAT CONNECTS TO THE SENSOR FAN.
 (3)  
Remove the fasteners that attach the ceiling panel to the structure.

 S 014-026

 (4)  
Lower the panel sufficiently to get access to the sensor bracket fasteners.

 S 034-004

 (5)  
Remove the sensor bracket fasteners and remove the bracket with the sensor attached from the sensor box.

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A

737-300/400/500MAINTENANCE MANUAL
TEMPERATURE SENSOR SEE A
CONTROL CABIN 
FASTENER (2 LOCATIONS) 
SENSOR BRACKET 
FLANGE 
TEMPERATURE  FASTENER 
SENSOR  (2 LOCATIONS) 

ELECTRICAL 
CONNECTOR  FILTER 
CEILING 
PANEL 
AIR INLET 
GRILLE 
WASHER 
(4 LOCATIONS) 
SCREW 
(4 LOCATIONS) 
TEMPERATURE SENSOR 
A

Control Cabin Temperature Sensor Installation
Figure 401

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737-300/400/500MAINTENANCE MANUAL
 S 034-005
 (6)
Remove the electrical connector of the temperature sensor.

 S 024-006

 (7)  
Remove the sensor flange fasteners and remove the sensor from the bracket.

 TASK 21-61-61-404-007
 3.  Install the Temperature Sensor for the Control Cabin (Fig. 401)____________________________________________________
 A. References
 (1)  
24-22-00/201, Electrical Power

 (2)  
36-05-00/201, Pneumatic System

 B. Access
 (1)  Location Zone
 101 Control Cabin, Left

 C. Procedure
 S 424-008
 (1)  
Install the temperature sensor on the sensor bracket.

 S 434-009

 (2)
Install the electrical connector to the temperature sensor.

 S 434-010

 (3)  
Put the sensor bracket on the sensor box and install the fasteners.

 S 414-011

 (4)  
Install the ceiling panel.

 S 434-012

 (5)  
Install the grille and the filter.

 D. Do a Test of the Temperature Sensor
 S 864-013
 (1) Remove the DO-NOT-CLOSE tag and close this circuit breaker:
 (a)  P6-4 Panel
 1) 6A4, TEMP CONTROL, AUTOMATIC, L

 S 864-024
 (2)  
Make sure all the other circuit breakers for the air conditioning are closed.

 (3)  
Supply electrical power (Ref 24-22-00/201).

 (4)
Supply pressure to the pneumatic system (Ref 36-05-00/201).

 S 864-014
 S 864-015
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737-300/400/500MAINTENANCE MANUAL
 S 864-016
 (5)  Remove the DO-NOT-OPERATE identifiers from the L and R PACK switches
 and put the L PACK switch to the AUTO or the HIGH position.
 S 864-017
 (6)  Put the temperature selector for the control cabin to the AUTO COOL
 position and then to the OFF position to move the mixture valve to
 the COLD position.
 NOTE:____ If the cabin temperature is below approximately
 65°F (18.3°C), you must supply warm air to the sensor.
　
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