TASK 30-00-00-040-802
4. MMEL 30-02 (DDPG) Preparation - Wing Anti-Ice Valve Position Lights Inoperative
A. General
(1) This task gives the maintenance steps which prepare the airplane for flight with the wing
anti-ice valve position lights inoperative.
(2) This procedure tests the valve connected to the failed position light. If both position lights are
failed, both valves must be tested.
B. References
Reference Title
27-81-00-080-801 Leading Edge Flap and Slat Locks Removal (P/B 201)
27-81-00-480-801 Leading Edge Flap and Slat Locks Installation (P/B 201)
C. Location Zones
Zone Area
522 Left Wing - Slat No. 4
622 Right Wing - Slat No. 5
D. Access Panels
Number Name/Location
521AB Outboard Leading Edge Blowout Door - Slat Station 20.04
621AB Outboard Leading Edge Blowout Door - Slat Station 20.04
E. Prepare for the Procedure
SUBTASK 30-00-00-860-009
WARNING
MAKE SURE YOU DO THE PROCEDURE TO DEACTIVATE THE LE SLATS.
THE LEADING EDGE SLATS CAN MOVE AND CAUSE INJURIES TO
PERSONS IF THEY ARE NOT DEACTIVATED.
(1) Do this task: Leading Edge Flap and Slat Locks Installation, TASK 27-81-00-480-801.
SUBTASK 30-00-00-010-003
(2) For the left wing, open this access panel:
Number Name/Location
521AB Outboard Leading Edge Blowout Door - Slat Station 20.04
SUBTASK 30-00-00-010-004
(3) For the right wing, open this access panel:
Number Name/Location
621AB Outboard Leading Edge Blowout Door - Slat Station 20.04
F. Test the Wing Anti-Ice Valve
SUBTASK 30-00-00-710-001
(1) Put the WING ANTI-ICE switch in the ON position.
SUBTASK 30-00-00-710-002
(2) Observe the position indicator on the wing anti-ice valve and make sure the valve indicates
OPEN.
SUBTASK 30-00-00-710-003
(3) Put the WING ANTI-ICE switch in the OFF position.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-00-00
Page 910
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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