HYDRAULIC
VALVE
PRESSURE BLEED AIR
CONTROL490` F
5TH-CHECK VALVE PRESSUREOVERHEATVALVETRANSMITTER
RESERVOIR
TRANSMITTER PRESSURECHECK VALVE
5TH-STAGE
VALVEOVERHEAT
PRESSUREPOTABLE
REGULATOR ANDSWITCH SENSORREGULATOR AND
STAGE SHUTOFF VALVE
SENSOR SWITCH
TAP WATER TAP
SHUTOFF VALVE AIRPRE-
PRE-AIR
9TH-9TH-
450` F BLEED AIR 450` F
CLEANER CLEANER COOLER
COOLER
STAGE
STAGE OSTAT OSTAT BLEED AIR
THERM- ISOLATION VALVE THERM-
BLEED AIR
HIGH-STAGE
GROUNDREGULATOR
HIGH-STAGEENGINE 1 REGULATOR
REGULATOR
PNEUMATICREGULATOR ENGINE 2
HIGH-STAGE CONNECTION
ENGINE START ENGINE
TO POTABLEVALVE SYSTEM START
WATER SYSTEM 1 ENGINE CORE
SYSTEM ENGINECAVITY
HIGH-STAGE
CORE28V DCVALVE
CAVITY
TRANSFER
BUS 1
C77
AIR
24-00-01 LEGEND
CONDITIONINGPRESS IND HOT BLEED AIR 1 AIRPLANES AFTER LINE NO. 1527
P6-4 CIRCUIT BREAKER PANEL COLD AIR
DISCHARGE AIR
PRECOOLED AIR
DUALRAM DOOR
RAM DOOR
BLEED
FULL OPEN FULL OPEN
D96
RECIRC FAN
D90
4
4 ELECTRICAL
OFF
5
5
CONNECTOR
TR 6 6 TX
AUTO 40 60
DUCT PRESSURE
3
OVHT
TRANSMITTER
D100
80
74
PSI
ZERO RESET
0 100
85 T403 RIGHT MANIFOLD
TEST
ADJUSTMENTISOLATION
TR 9
6 TX PRESSURE XMTR
L PACKR PACK
CAP
PRESSURE
(STA 558,WL 160,
OFFVALVEOFF
3 3 PRESSURE
CLOSE
AUTO AUTO
LBL 42) SENSING
AMBIENT VENTLINE
SENSING
HIGHAUTO HIGH
N12 PRESSURET405 LEFT MANIFOLD LINE
WING
WING
ANTI
PACK
PACKOPEN
IND DUAL PRESSURE XMTR
ANTI
TRIP OFFTRIP OFF
ICE
ICE
WING-BODY
WING-BODY
(STA 558,WL 160, DRAIN PLUG
TRIP
OVERHEAT
OVERHEAT
BLEED
LBL 42)
BLEED
DRAIN PLUG
TRIP OFF
TRIP OFF
RESET
INBDFWD
OFF OFF
ON ON
1 APU2
BLEED
737-400 737-300/-500
AUTO
OFF SCHED
FAIL
STANDBY MANUAL
DESCENT
DUCT PRESSURE TRANSMITTER INSTALLATION
P5-10 AIR CONDITIONING MODULE
Engine Bleed Pressure Indicating Schematic
Figure 1
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36-21-05
ALL ú ú 02 Page 2 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
DUCT PRESSURE TRANSMITTER - SERVICING
_____________________________________
1. General_______
A. This procedure contains the task to do the servicing for the duct pressure transmitter.
B. There are two pressure transmitters, one for each engine bleed system.
C. There is a drain plug on one pressure sense line of each pressure transmitter (Fig. 301).
TASK 36-21-11-603-004
2. Duct Pressure Transmitter Servicing___________________________________
A. Access
(1)
Location Zones
212/214 Air Conditioning Equipment Bay
(2)
Access Panels
3303/3403 A/C Access Panel
B. Prepare to Remove the Moisture
S 013-001
(1) Open the door for the air conditioning equipment bay to get access to the drain plugs.
C. Remove the Moisture
S 613-002
(1) Do the steps that follow for each duct pressure transmitter:
(a)
Remove the drain plug from the pressure sense line of the transmitter (Fig. 301).
(b)
Permit the moisture to drain from the transmitter.
(c)
Install the drain plug on the sense line for the pressure transmitter.
D. Put the Airplane To Its Usual Condition
S 413-003
(1) Close the doors for the air conditioning equipment bay.
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