21-51-00
 ALL  ú ú 01 Page 543 ú Mar 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 215-153
 (12) Make sure that the APU EGT decreases.
 NOTE: If the APU EGT does not decrease, there is a problem with
____
 the wiring.

 S 435-154
 (13)
 Connect the solenoid A electrical connector, D394, to the right pack flow control and shutoff valve.

 S 215-235

 (14)
 Make sure that the flow control and shutoff valve for the right pack moves towards the open position.

 S 215-155

 (15)
 Make sure that the APU EGT decreases.

 NOTE: If the APU EGT does not decrease, there is a problem with
____
 the wiring.

 S 865-156
 (16) Move the R PACK switch to OFF.
 F. Put the Airplane Back to Its Usual Condition
 S 865-157
 (1)  
Shut off the APU if it is not necessary (AMM 49-11-00/201).

 S 865-158

 (2)  
Move the APU BLEED switch to OFF.

 S 865-159

 (3)  
Move the ISOLATION VALVE switch to CLOSE.

 S 865-160

 (4)  
Move the L PACK and R PACK switches to OFF.

 S 865-161

 (5)  
Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

 (6)  
Close the bay doors to the air conditioning equipment.

 S 415-162
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 TASK 21-51-00-745-360
 10. BITE Test - 35 Degree F Controller (Fig. 503)
__________________________________
 A. References
 (1)  AMM 24-22-00/201, Manual Control
 B. Access
 (1)  Location Zones
 102 Control Cabin - Right Side
 212 Left Air Conditioning Equipment Bay
 214 Right Air Conditioning Equipment Bay

 C. Preparation
 S 865-361
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-362

 (2)  
Close these circuit breakers on the P6-4 panel:

 (a)  
6A2, TEMP CONTROL 35 DEG F CONT L

 (b)  
6A1, TEMP CONTROL 35 DEG F CONT R

 S 865-359
 (3)  
Set the L and R PACK switches on the P5-10 air conditioning panel to OFF.

 S 015-363

 (4)  
Lower the 3303L and 3403R air conditioning access panels.

 D. Procedure
 S 745-364
 (1)  Do these steps to do a BITE test for the 35 degree F controller:
 (a)  
Push the GO (green) and NO GO (red) lights on the controller. 1) Make sure the lights come on when you push them.

 (b)  
Rotate and hold the TEST SWITCH to position 1.
 1) Make sure the GO light comes on.

 (c)  
Rotate and hold the TEST SWITCH to position 2. 1) Make sure the GO light comes on. 2) Make sure the 35 degree F valve goes to the fully open

 position.

 (d)  
Rotate and hold the TEST SWITCH to position 3.
 1) Make sure the GO light comes on.

 (e)  
Rotate and hold the TEST SWITCH to position 4. 1) Make sure the GO light comes on. 2) Make sure the 35 degree F valve goes to the fully closed

 position.

 (f)  
Rotate and hold the TEST SWITCH to position 5.
 1) Make sure the GO light comes on.

 (g)  
Rotate the TEST SWITCH to the FLIGHT position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

35`F CONTROLLER 
SEE  B 
ECS BAY 
SEE  A 
　
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