WING ANTI-ICING GROUND OVERHEAT THERMAL SWITCH - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) Removal of the wing anti-icing ground overheat thermal switch.
(2) Installation of the wing anti-icing ground overheat thermal switch.
TASK 30-11-21-000-801
2. Wing Anti-Icing Ground Overheat Thermal Switch Removal
(Figure 401)
A. General
(1) This task gives instructions to remove the Wing Anti-Icing Ground Overheat Thermal Switch.
B. References
Reference Title
27-81-00-480-801 Leading Edge Flap and Slat Locks Installation (P/B 201)
C. Access Panels
Number Name/Location
521BB Engine Fuel Valve Shutoff Access Panel - Slat Station 36.02
621BB Engine Fuel Spar Valve Access Panel - Slat Station 36.02
D. Prepare for the Removal
SUBTASK 30-11-21-860-001
WARNING
YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
THE LEADING EDGE FLAPS AND SLATS LOCKS. IF YOU DO NOT INSTALL
THE LOCKS CORRECTLY, THE LEADING EDGE FLAPS CAN MOVE
QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO
EQUIPMENT.
(1) Install the leading edge flaps and slats locks (TASK 27-81-00-480-801).
SUBTASK 30-11-21-860-002
(2) Open this circuit breaker and install safety tag:
CAPT Electrical System Panel, P18-3
Row Col Number Name
A 1 C00146 ANTI-ICE & RAIN WING ANTI-ICE VALVE
SUBTASK 30-11-21-010-001
(3) Open the applicable access panels:
Number Name/Location
521BB Engine Fuel Valve Shutoff Access Panel - Slat Station 36.02
621BB Engine Fuel Spar Valve Access Panel - Slat Station 36.02
E. Wing Anti-Icing Ground Overheat Thermal Switch Removal
SUBTASK 30-11-21-020-001
(1) Disconnect the electrical connector [4] from the thermal switch [3].
SUBTASK 30-11-21-020-002
(2) Remove the thermal switch [3].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-11-21
Page 401
D633A101-ILF Oct 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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