separator is fully open. 2) Do a BITE test of the 35°F control system.
(c)
Remove and replace the defective component.
S 975-137
(6) Write down the position of the 35°F control valve for the left water separator.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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A
737-300/400/500MAINTENANCE MANUAL
S 865-138
(7)
Set the L PACK switch to OFF.
S 865-139
(8)
Set the R PACK switch to HIGH.
S 975-140
(9)
Write down the SUPPLY DUCT temperature.
S 975-141
(10)
Make sure that the SUPPLY DUCT temperature is between 32°F (0°C) and 42°F (6°C).
(a)
If the SUPPLY DUCT temperature is high, make sure that the 35°F control valve for the right water separator is fully closed.
(b)
If the SUPPLY DUCT temperature is low, do these steps: 1) Make sure that the 35°F control valve for the right water
separator is fully open. 2) Do a BITE test of the 35°F control system.
(c)
Remove and replace the defective component.
S 975-142
(11)
Write down the position of the 35°F control valve for the right water separator.
S 975-143
(12)
Make sure that the position of the 35°F control valve for each water separator is approximately the same.
S 865-144
(13)
Set the R PACK switch to OFF.
F. Put the Airplane Back to Its Usual Condition
S 865-311
(1)
Shutoff the APU if it is not necessary (AMM 49-11-00/201).
(2)
Move the APU BLEED switch to OFF.
(3)
Move the ISOLATION VALVE switch to CLOSE.
(4)
Move the L PACK and R PACK switches to OFF.
S 865-315
(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 865-312
S 865-313
S 865-314
S 415-316
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A 737-300/400/500MAINTENANCE MANUAL
TASK 21-51-00-715-338
9. Operational Test - Air Cycle System - APU Flow Mode Test
________________________________________________________
A. General
(1)
This procedure has the steps to test the turbofan valve.
(2)
This procedure supplies a quick check of the system performance for scheduled maintenance checks and to troubleshoot flight operation problems.
B. References
(1)
AMM 21-51-21/701, Heat Exchangers
(2)
AMM 21-61-00/101, Temperature Control System
(3)
AMM 24-22-00/201, Electrical Power
(4)
AMM 49-11-00/201, Auxiliary Power Unit
C. Access
(1)
Location Zones
101 Control Cabin - Left
102 Control Cabin - Right
210 Air Conditioning Distibution Bay
212 Left Air Conditioning Equipment Bay
214 Right Air Conditioning Equipment Bay
(2)
Access Panels
3303L A/C Access Panel
3403R A/C Access Panel
D. Prepare for the Tests
S 865-317
(1)
Make sure that all the circuit breakers for the air conditioning and the pneumatic systems are closed.
S 865-318
(2)
Make sure that these circuit breakers are closed on the P6-3 panel:
(a)
MASTER CAUTION (all except FUEL, if installed)
(b)
INDICATOR LIGHTS, MASTER DIM BUS (9 locations)
(c)
DIM & TEST (1 location)
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