TRIP RESET BUTTON
A
SEE B
MANUAL WRENCHING DRIVE
1
POSITION
INDICATOR
PRECOOLER
CONTROL
VALVE
ENGINE FAN AIR INLET DUCT BLEED AIR
PRECOOLER FWD
B
1 NOT INSTALLED ON ALL AIRPLANES
Low Duct Pressure. The Engine Was the Bleed Source. Figure 104 (Sheet 6)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SEE C 5TH-STAGE SUPPLY LINE THE PRECOOLER SUPPLY LINE TO CONTROL VALVE
MS-6 (UNION) SUPPLY LINE AIR REGULATOR TO THE BLEED
GAUGE (Ps) PRESSURE SUPPLY TEST LINE DUCT 5TH-STAGE CHECK VALVE 5TH-STAGE
FWD
REGULATOR PRESSURE PRESSURE SUPPLY NITROGEN
C
Figure 104 (Sheet 7) Low Duct Pressure. The Engine Was the Bleed Source.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
DSEE CONTROL VALVE PRECOOLER
PRECOOLER CONTROL LINE TO THE CONTROL PRESSURE VALVE SENSOR
MS-6 (UNION)
PRECOOLER CONTROL VALVE
CONTROL
PRESSURE
GAUGE (Pc)
TEST LINENEEDLE VALVE
D
Low Duct Pressure. The Engine Was the Bleed Source. Figure 104 (Sheet 8)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
SEE E
SENSE LINE PRECOOLER
TO 450`F THERMOSTAT
SUPPLY PRESSURE
SENSE LINE TO
BLEED AIR REGULATOR
CONTROL PRESSURE GAUGE (Pc)
PRSOV
MS-6 (UNION)
TEST LINE MS-6 (UNION)
CONTROL PRESSURE SENSE LINE FROM BLEED AIR REGULATOR
E
Low Duct Pressure. The Engine Was the Bleed Source.
Figure 104 (Sheet 9)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SEE F G REGULATING PRESSURE AND SHUTOFF VALVE (PRSOV)
PRSOV
SENSE LINE TO 450`F THERMOSTAT
FWD F CAP
PRSOV
FWD
CAP
CONTROL PRESSURE SENSE LINE FROM BLEED AIR REGULATOR
G
Low Duct Pressure. The Engine Was the Bleed Source. Figure 104 (Sheet 10)
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