(Continued)
Zone Area
114 Area Above and Outboard of Nose Landing Gear Wheel Well - Right
D. Procedure
SUBTASK 30-31-00-861-001
(1) Supply electrical power to the airplane. To supply power, do this task: Supply External Power,
TASK 24-22-00-860-813.
SUBTASK 30-31-00-860-011
(2) Make sure there are no protective covers on the air data sensors.
(a) If there are any protective covers, then proceed with the next step; otherwise, continue
with SUBTASK 30-31-00-865-002.
SUBTASK 30-31-00-865-006
(3) Open these circuit breakers and install safety tags:
CAPT Electrical System Panel, P18-3
Row Col Number Name
C 1 C00523 HEATERS CAPT PITOT
C 2 C00238 HEATERS TEMP PROBE
C 3 C01072 HEATERS ALPHA VANE LEFT
C 4 C00236 HEATERS ELEV PITOT LEFT
D 3 C01071 HEATERS ALPHA VANE RIGHT
D 4 C00237 HEATERS ELEV PITOT RIGHT
D 5 C00525 HEATERS F/O PITOT
D 6 C00524 HEATERS AUX PITOT
SUBTASK 30-31-00-860-010
(4) Remove the protective covers.
SUBTASK 30-31-00-865-004
(5) Remove the safety tags and close these circuit breakers:
CAPT Electrical System Panel, P18-3
Row Col Number Name
C 1 C00523 HEATERS CAPT PITOT
C 2 C00238 HEATERS TEMP PROBE
C 3 C01072 HEATERS ALPHA VANE LEFT
C 4 C00236 HEATERS ELEV PITOT LEFT
D 3 C01071 HEATERS ALPHA VANE RIGHT
D 4 C00237 HEATERS ELEV PITOT RIGHT
D 5 C00525 HEATERS F/O PITOT
D 6 C00524 HEATERS AUX PITOT
(a) Make sure the amber OVERHEAT lights on the window and pitot heat module go off.
SUBTASK 30-31-00-860-012
(6) Continue with SUBTASK 30-31-00-860-003.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-31-00
Page 505
D633A101-ILF Oct 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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