ENGINE ANTI-ICE PRESSURE SENSOR - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) Engine Anti-Ice Pressure Sensor Removal
(2) Engine Anti-Ice Pressure Sensor Installation.
TASK 30-21-21-000-802
2. Engine Anti-Ice Pressure Sensor Removal
(Figure 401)
A. General
(1) This task gives instructions to remove the Engine Anti-Ice Pressure Sensor.
B. References
Reference Title
36-00-00-860-806 Remove Pressure from the Pneumatic System (P/B 201)
71-11-02-010-801-F00 Open the Fan Cowl Panels (P/B 201)
C. Location Zones
Zone Area
411 Engine 1 - Engine
421 Engine 2 - Engine
D. Prepare for the Removal
SUBTASK 30-21-21-860-004
(1) Open these circuit breakers and install safety tags:
CAPT Electrical System Panel, P18-3
Row Col Number Name
A 6 C00148 ANTI-ICE & RAIN ENG 1 & WING CONT
B 6 C00149 ANTI-ICE & RAIN ENGINE 2 CONTROL
SUBTASK 30-21-21-010-009
(2) If not already done, do this task: Remove Pressure from the Pneumatic System,
TASK 36-00-00-860-806.
SUBTASK 30-21-21-010-005
(3) For the right fan cowl panel, do this task: Open the Fan Cowl Panels,
TASK 71-11-02-010-801-F00.
E. Engine Anti-Ice Pressure Sensor Removal
SUBTASK 30-21-21-020-001
(1) Disconnect the electrical connector [5] from the TAI pressure switch [4].
SUBTASK 30-21-21-020-002
CAUTION
WHEN YOU DISCONNECT THE PNEUMATIC FITTING, HOLD THE FITTING
ON THE PRESSURE SWITCH IN PLACE WITH A SECOND WRENCH. IF YOU
DO NOT HOLD THE FITTING IN PLACE YOU WILL DAMAGE THE TAI
PRESSURE SWITCH.
(2) Remove the pneumatic fitting [1] from the TAI pressure switch [4].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-21-21
Page 401
D633A101-ILF Oct 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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