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9TH STAGE MANIFOLD
CONTROL PORT REDUCER AND O-RING
HIGH-STAGE
VALVE
ACTUATOR
9TH-STAGE MANIFOLD
HIGH-STAGE VALVE
A
737-300/400/500MAINTENANCE MANUAL
HIGH-STAGE VALVE
SEE H
HIGH PRESSURE 9TH-STAGE MANIFOLD
HIGH-STAGE VALVE
SEE I
FWD RIGHT SIDE
H
POSITION INDICATOR
HIGH-STAGE VALVE
I
Low Duct Pressure. The Engine Was the Bleed Source. Figure 104 (Sheet 11)
B66521
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36-11-05
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
HIGH-STAGE REGULATOR
SEE J HIGH-STAGE REGULATOR
CONTROL PRESSURE
SENSE LINE
SUPPLY PRESSURE
SENSE LINE
TEST LINE
SUPPLY PRESSURE
GAUGE (Ps)
FWD
NITROGEN
SUPPLY
PRESSURE
PRESSURE
REGULATOR J
Low Duct Pressure. The Engine Was the Bleed Source
Figure 104 (Sheet 12)
B66532
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
HIGH-STAGE VALVE
SEE K
CONTROL PRESSURE
LINE TO HIGH
STAGE VALVE
HIGH-STAGE
REGULATOR
HIGH-STAGE VALVE ACTUATOR
VALVE POSITION INDICATOR K HIGH-STAGE VALVE FWD
Low Duct Pressure. The Engine Was the Bleed Source. Figure 104 (Sheet 13)
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A
737-300/400/500MAINTENANCE MANUAL
HIGH-STAGE REGULATOR HIGH-STAGE
SEE L
REGULATOR
CONTROL PRESSURE GAUGE (Pc)
CONTROL PRESSURE SENSE LINE SUPPLY PRESSURE SENSE LINE
TEST LINE
GAUGE (Pc) SUPPLY PRESSURE
FWD
NITROGEN SUPPLY PRESSURE
PRESSURE REGULATOR L
Low Duct Pressure. The Engine Was the Bleed Source. Figure 104 (Sheet 14)
A99775
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A 737-300/400/500MAINTENANCE MANUAL
PREREQUISITES
MAKE SURE THESE CIRCUIT BREAKERS ARE CLOSED (P6-4): B1,B2,B3,D1,D2,D3,D4
MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION: ELECTRICAL POWER IS ON (AMM 24-22-00/201) NO PRESSURE IN THE PNEUMATIC SYSTEM (AMM 36-00-00/
201) APPLICABLE ENGINE BLEED SWITCH (P5 PANEL) IN THE OFF POSITION
EQUIPMENT: 0-200 PSIG GAS SOURCE (NITROGEN BOTTLE) PRESSURE REGULATOR PRESSURE GAUGES (2 REQUIRED)MS-6 UNION FITTINGS (3 REQUIRED) NEEDLE VALVE
NOTE:____ . HIGH DUCT PRESSURE CAN BE CAUSED BY A PROBLEM
WITH ONE OF THESE ITEMS:
- PRESSURE INDICATION SYSTEM
- PRSOV OR BLEED AIR REGULATOR (BAR)
HIGH DUCT PRESSURE. - LEAKY SENSE LINES.
THE ENGINE WAS THE . THE BLEED SYSTEM MODULATES ENGINE PRESSURE
BLEED SOURCE. TO THAT SHOWN ON FIG. 102.
YES YES
1 ____
NOTE: A PROBLEM WITH THE
21 REMOVE THE PNEUMATIC
41 REMOVE THE PNEUMATIC DUCT PRESSURE PRESSURE FROM THE SYSTEM PRESSURE FROM THE SYSTEM TRANSMITTER OR (AMM 36-05-00/201). (AMM 36-05-00/201). INDICATOR CAN CAUSE REPLACE THE DUCT PRESSURE REPLACE THE DUCT PRESSURE A HIGH DUCT PRES-TRANSMITTER ON THE AFFECTEDINDICATOR ON THE P5 PANEL.SURE CONDITION. SIDE (AMM 36-21-11/401).
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