Aviation Glossary - Probe Heat

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Probe Heat

the electrical anti-icing of the air data probes (pitot probe, static ports, angle of attack sensors, outside air temperature sensors) which are located on the outside of the forward fuselage. The failure of the probe heat system on the A330 is suspected as being a contributory factor to the loss of Air France Flight 447 over the South Atlantic in June 2009. If the probes become obstructed with ice, the flight crew can lose all altitude, airspeed and angle of attack information and the computers which receive this information will generate erroneous outputs

source: ICAO English Pro Aviation Glossary

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