Boeing 737-600 - Section 30-31 - AIR DATA SENSOR ANTI-ICING; Subject 30-31-00 - AIR DATA SENSOR ANTI-ICING; Pageblock 30-31-00;201 - AIR DATA SENSOR ANTI-ICING - MAINTENANCE PRACTICES; Task 30-31-00-900-801 - Pitot Probe, AOA Sensor, and TAT Probe Heater Replacement

AIR DATA SENSOR ANTI-ICING - MAINTENANCE PRACTICES
1. General
A. This procedure has these tasks:
(1) Replacement of the pitot probe, angle of attack (AOA) sensor, and total air temperature (TAT)
probe.
NOTE: The angle of attack (AOA) sensors are also referred to as alpha vanes.
(a) The pitot probe, AOA sensor, and TAT probe heaters are built into the respective air data
sensor.
(b) If a heater fails, then the sensor must be replaced.
(2) AOA Vane, Pitot, Elevator Pitot, Temperature Probes Deactivation.
(3) AOA Vane, Pitot, Elevator Pitot, Temperature Probes Activation.
TASK 30-31-00-900-801
2. Pitot Probe, AOA Sensor, and TAT Probe Heater Replacement
A. References
Reference Title
27-31-94-000-801 Feel System Pitot Probe Removal (P/B 401)
27-31-94-400-801 Feel System Pitot Probe - Installation (P/B 401)
34-11-01-000-801 Pitot Probe - Removal (P/B 401)
34-11-01-400-801 Pitot Probe - Installation (P/B 401)
34-21-05-000-801 Angle of Attack Sensor - Removal (P/B 401)
34-21-05-400-801 Angle of Attack Sensor Installation (P/B 401)
34-21-06-000-801 Total Air Temperature Probe - Removal (P/B 401)
34-21-06-400-801 Total Air Temperature Probe - Installation (P/B 401)
B. Location Zones
Zone Area
113 Area Above and Outboard of Nose Landing Gear Wheel Well - Left
114 Area Above and Outboard of Nose Landing Gear Wheel Well - Right
323 Vertical Fin - Front Spar To Rear Spar
C. Procedure
SUBTASK 30-31-00-900-001
(1) If a pitot probe heater is defective, then you must replace the pitot probe. These are the tasks:
(a) Pitot Probe - Removal, TASK 34-11-01-000-801.
(b) Pitot Probe - Installation, TASK 34-11-01-400-801.
SUBTASK 30-31-00-900-004
(2) If a feel system pitot probe heater is defective, then you must replace the feel system pitot
probe. These are the tasks:
(a) Feel System Pitot Probe Removal, TASK 27-31-94-000-801.
(b) Feel System Pitot Probe - Installation, TASK 27-31-94-400-801.
SUBTASK 30-31-00-900-002
(3) If an AOA sensor heater is defective, then you must replace the AOA sensor. These are the
tasks:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-31-00
Page 201
D633A101-ILF Oct 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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