The Pitot Probes' Heating Element and Heating Failure on B737NG Aircraft
The pitot probe measures pitot air pressure.Pitot air pressure is the air pressure on the pitot probe tube as a result of the forward motion of the airplane.The pitot probes on B737NG aircraft have integral heaters,a thin wire heating element is wound around inside the probe,preventing ice forming on the pitot probes'tips and strut.If the associated probe heater does not draw sufficient electrical current,the current monitor system will activate the amber probe heat warning light for that heater.In this paper,the internal thin wire heating element of the pitot probes on B737NG aircraft is introduced and analyzed,and the pitot probe heating failure is deeply discussed.
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