*
When the airspeed is more than 50 knots

*
The airplane is in the air.

See the attitude and direction section for more information about the ADMs (SECTION 34-20).
An electronics unit in the electrical load management system (ELMS) controls the heat for the TAT probe. The TAT probe heats when the airplane is in the air.
See the electrical load management (ELM) system section for more information about the ELMS (SECTION 24-09).
The electronic engine controls (EECs) control the heat for the engine P2/T2 probes. An engine probe heats after the engine starts or the airplane is in the air. The engine data interface unit (EDIU) supplies an interface between the EEC and the ARINC 629 buses.
See the fuel control system section for more information about the EECs (SECTION 73-21).
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PITOT AND STATIC (AIR DATA SENSORS) -INTRODUCTION

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PITOT AND STATIC (AIR DATA SENSORS) -COMPONENT LOCATIONS

Component Locations
These probes and sensors are on the right side of the airplane nose:
*
Right AOA sensor

*
Right pitot probe

*
Center pitot probe.

These probes and sensors are on the left side of the airplane nose:
*
Left AOA sensor

*
TAT probe

*
Left pitot probe.

The engine P2/T2 probes are on the lip of the engine inlet cowl at the 12:00 position.
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PITOT AND STATIC (AIR DATA SENSORS) -COMPONENT LOCATIONS

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PITOT AND STATIC (AIR DATA SENSORS) -GROUND TESTS

General
These are the pitot and static (air data sensors) operational tests that show when you select ATA 30 Air Data Sensor Ice System:
*
Pitot/AOA heat (left) test

*
Pitot/AOA heat (right) test

*
Pitot heat (center) test

*
TAT probe heat.

This is the pitot and static (air data sensors) system test that shows when you select ATA 71 -80 Left (Right) Engine:
* P2/T2 probe heat.
Left and Right Pitot/AOA Heat Tests
These tests make sure that the related pitot probe and the AOA sensor heaters operate correctly.
During the test, the related pitot probe and AOA sensor become very hot. The tests each take less than 1 minute.
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM THE LEFT (RIGHT) PITOT PROBES AND THE LEFT (RIGHT) ANGLE OF ATTACK VANE. THESE COMPONENTS WILL BECOME VERY HOT AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
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Center Pitot Heat Test
This test makes sure that the center pitot probe heater operates correctly.
During the test, the center pitot probe becomes very hot. The test takes less than 1 minute.
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM THE CENTER PITOT PROBE. THESE COMPONENTS WILL BECOME VERY HOT AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
TAT Probe Heat
This test makes sure that the TAT probe heater operates correctly.
During the test, the TAT probe becomes very hot. The test takes less than 1 minute.
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM THE TAT PROBE. THESE COMPONENTS WILL BECOME VERY HOT AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
P2/T2 Probe Heat
This test makes sure that the P2/T2 probe heat operates correctly. The EEC channels monitor heater current.
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PITOT AND STATIC (AIR DATA SENSORS) -GROUND TESTS
You must energize both EEC channels for this test. During the test, the P2/T2 probe heater gets power for a short time. The test takes less than 1 minute.
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PITOT AND STATIC (AIR DATA SENSORS) -PITOT PROBE HEAT -GENERAL DESCRIPTION

Purpose
The heaters in the pitot probes keep ice off of the probes so their data is reliable.
General Description
　
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