ENGINE COWL TAI VALVE - REMOVAL/INSTALLATION
1. General
A. This procedure has tasks:
(1) The removal of the engine cowl TAI valve
(2) The installation of the engine cowl TAI valve.
B. The engine cowl TAI valve is at the 2 o'clock position on the right side of the engine fan case.
TASK 30-21-11-000-801
2. Engine Cowl TAI Valve Removal
(Figure 401)
A. General
(1) This task gives instructions to remove the Engine Cowl TAI Valve.
(2) For this procedure the engine cowl TAI valve will be referred to as the valve.
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
410 Subzone - Engine 1
420 Subzone - Engine 2
D. Prepare for the Removal
SUBTASK 30-21-11-860-001
(1) To remove the valve on the No. 1 power plant, do this step:
(a) 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
A 7 C01001 ANTI-ICE & RAIN ENG 1 COWL AI VALVE
SUBTASK 30-21-11-860-002
(2) To remove the valve on the No. 2 power plant, do this step:
(a) Open these circuit breakers and install safety tags:
CAPT Electrical System Panel, P18-3
Row Col Number Name
B 6 C00149 ANTI-ICE & RAIN ENGINE 2 CONTROL
B 7 C01002 ANTI-ICE & RAIN ENG 2 COWL AI VALVE
SUBTASK 30-21-11-860-003
(3) Make sure the fuel shutoff lever for the applicable engine is in the cutoff position and install a
DO-NOT-OPERATE tag.
SUBTASK 30-21-11-860-004
(4) If not already done, do this task: Remove Pressure from the Pneumatic System,
TASK 36-00-00-860-806.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-21-11
Page 401
D633A101-ILF Oct 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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