21-61-34
ALL ú ú 03.1 Page 402 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(5) S 434-035Turn the studs 1/4 turn clockwise to lock the assembly in its position.
(6) S 414-046Install the plug buttons in the access holes of the sensor assembly.
(7) S 434-047Connect the three electrical connectors to the sensor assembly.
(8) S 864-048Remove the DO-NOT-CLOSE tag, and close the TEMP CONTROL AUTOMATIC R circuit breaker on the P6 panel.
(9) S 864-053Supply electrical power (Ref 24-22-00/201).
S 214-054 (10) Make sure that the fan operates.
ú ú ú ú ú ú ú ú ú S 414-057 (11) Install the bullnose.S 714-058(12) Hold a 5 inch by 8 inch sheet of lightweight paper such as tissuepaper over the air inlet grille of the sensor.(a) Make sure that the fan holds the paper in its position.NOTE: The purpose of this step is to make sure the____direction of the airflow is towards the fan.
S 084-059 (13) Remove the paper.
S 864-060 (14) Remove the electrical power if it is not necessary (Ref 24-22-00/201).
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21-61-34
ALL ú ú 03.1 Page 403 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
PASSENGER CABIN TEMPERATURE SENSOR FAN
1/4 TURN STUD
TEMPERATURE (2 PLACES)
ASEE SENSOR FAN CONNECTORS ELECTRICAL DUCT SENSOR
FWD A
GROUND
WIRE
A WIRES
ELECTRICAL CONNECTOR INBD
FAN FWDBOLT (4 PLACES)
DUCT TERMINAL BOARD APLUG BUTTON (2 PLACES)
STOWAGE BIN STRUCTURE (REF)
PSU STRUCTURE (REF)
BULLNOSE COVER
SCREW
GRILL (REF) SENSOR
INBD CLIP-ON NUT
DUCT (REF)
BULLNOSE ATTACHMENT
A-A
Passenger Cabin Temperature Sensor Fan
Figure 401
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21-61-34
ALL ú ú 03 Page 404 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
DUCT TEMPERATURE SENSORS - REMOVAL/INSTALLATION
_______________________________________________
1. General_______
A. There are four duct temperature sensors.
B. Each system has a limit sensor for the duct temperature and a cabin anticipator sensor.
C. One duct temperature limit sensor and anticipator sensor is in the branch of the overhead distribution manifold that leads to the passenger cabin and the other ones are in the main distribution manifold duct that leads to the control cabin.
D. Access to the sensor is through the aft bulkhead of the forward cargo compartment and the overhead ceiling panels in the passenger cabin.
TASK 21-61-41-004-014
2. Remove the Duct Temperature Sensor (Fig. 401)__________________________________
A. References
(1) 25-21-45/401, Sculptured Ceiling Panels
B. Access
(1) Location Zones
107 Forward Half of Cabin
210 Air Conditioning Distribution Bay
C. Prepare for the Removal
S 864-001
(1)
Open the TEMP CONTROL AUTOMATIC circuit breaker on the P6 panel and attach a DO-NOT-CLOSE tag.
S 014-002
(2)
Remove the center panel on the aft bulkhead in the forward cargo compartment to get access to the main distribution manifold duct.
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