36-21-11
 ALL  ú ú 02 Page 301 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SEE  A 
SEE  B 
FWD 
A 

DUCT PRESSURE TRANSMITTER SHOCK MOUNT  DUCT PRESSURE TRANSMITTER  SHOCK MOUNT 
VENT AMBIENT  VENT AMBIENT 
ZERO RESET ADJUSTMENT CAP  ZERO RESET ADJUSTMENT CAP 
PRESSURE 
PRESSURE  SENSING LINE 
SENSING LINE 
DRAIN PLUG 
DRAIN PLUG 

INBD FWD
737-300/-500  737-400
B
NOTE: RIGHT INSTALLATION IS SHOWN, LEFT INSTALLATION IS EQUIVALENT.
Duct Pressure Transmitter Servicing Figure 301
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 36-21-11
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 DUCT PRESSURE TRANSMITTER - REMOVAL/INSTALLATION
________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task removes the duct pressure transmitter. The second task installs the duct pressure transmitter.
 B.  There are two duct pressure transmitters. They convert and transmit manifold duct pressure data into electrical signals which are used by the duct pressure indicator (on P5, forward overhead panel) to show manifold duct pressures.
 C.  The transmitters are installed on the outboard side of the forward air conditioning equipment bay (Fig. 401).
 D.  The removal procedure and the installation procedure are the same for each transmitter.
 TASK 36-21-11-004-001
 2.  Duct Pressure Transmitter Removal (Fig. 401)
_________________________________
 A.  Access
 (1)  
Location Zones
 101/102 Control Cabin
 212/214 Air Conditioning Equipment Bay

 (2)  
Access Panels
 3303/3304 A/C Access Panel

 B.  Prepare to Remove the Duct Pressure Transmitter
 S 864-002
 (1)  
Open the PRESSURE IND circuit breaker, on the P6-4 panel, and attach a DO-NOT-CLOSE tag.

 S 864-003

 (2)  
Open the doors for the air conditioning equipment bay to get access to the transmitter.

 C.  Remove the Transmitter
 S 034-004
 (1)  
Disconnect the pressure sense line from the transmitter.

 (2)  
Disconnect the electrical connector.

 S 034-006

 (3)  
Cut the lockwire and loosen the screw for the clamp in the shock mount.

 (4)  
Remove the transmitter from the shock mount.

 S 034-005
 S 024-007
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 36-21-11
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

SEE  A 
CONNECTOR ELECTRICAL  SUPPORT BRACKET 
ZERO RESET ADJUSTMENT CAP 
DRAIN PLUG

SHOCK
MOUNT
AMBIENT VENT
SEE B
FWD
A
DUCT PRESSURE
TRANSMITTER

PRESSURE SENSING LINE
DRAIN PLUG
INBD FWD
737-300/-500  737-400
B
NOTE: RIGHT INSTALLATION IS SHOWN, LEFT INSTALLATION IS EQUIVALENT.
Duct Pressure Transmitter Installation Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 36-21-11
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 TASK 36-21-11-404-008
 3.  Duct Pressure Transmitter Installation______________________________________
　
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