WING THERMAL ANTI-ICING - MAINTENANCE PRACTICES
1. General
A. This procedure has these tasks:
(1) Wing thermal anti-icing - deactivation.
(2) Wing thermal anti-icing - activation.
TASK 30-11-00-040-801
2. Wing Thermal Anti-Icing - Deactivation
A. General
(1) This task will deactivate the power to the wing thermal anti-ice systems.
B. Location Zones
Zone Area
212 Flight Compartment - Right
510 Subzone - Left Wing: Leading Edge, Fwd of Front Spar, Inbd of Strut and Nacelle
Gap Cover Area
520 Subzone - Left Wing: Leading Edge, Fwd of Front Spar, Outboard of Strut and
Nacelle Gap Cover Area
610 Subzone - Right Wing: Leading Edge, Forward of Front Spar, Inboard of Nacelle
Strut, Including Gap Cover Area
620 Subzone - Right Wing: Leading Edge, Forward of Front Spar, Outboard of Nacelle
Strut
C. Procedure
SUBTASK 30-11-00-020-001
(1) Open these circuit breakers and install safety tags:
CAPT Electrical System Panel, P18-3
Row Col Number Name
A 1 C00146 ANTI-ICE & RAIN WING ANTI-ICE VALVE
A 6 C00148 ANTI-ICE & RAIN ENG 1 & WING CONT
A 7 C01001 ANTI-ICE & RAIN ENG 1 COWL AI VALVE
B 6 C00149 ANTI-ICE & RAIN ENGINE 2 CONTROL
B 7 C01002 ANTI-ICE & RAIN ENG 2 COWL AI VALVE
D. Wing Thermal Anti-Icing - Tryout
NOTE: This tryout is to make sure that the power to the wing thermal anti-ice systems is in a zero
energy state.
SUBTASK 30-11-00-210-004
(1) Make sure the WING ANTI-ICE switch on the engine and wing anti-ice control panel (P5-11) is
in the OFF position.
SUBTASK 30-11-00-210-005
(2) Make sure the L and R VALVE OPEN lights on the control panel are off.
SUBTASK 30-11-00-020-002
(3) Push and release the L VALVE OPEN and R VALVE OPEN light switches on the engine and
wing anti-ice control panel (P5-11).
(a) Make sure that each light stays off.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-11-00
Page 201
D633A101-ILF Feb 15/2015
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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