Is each pitot tube equipped with an integral heating element that receives power from the 28 VDC bus?

• A. True
• B. False

Answer: (A)

Each pitot tube being equipped with an integral heating element that receives power from the 28 VDC bus is indeed accurate. This design serves a crucial function in maintaining the accuracy of the airspeed measurements under various environmental conditions, particularly in cold weather. Ice accumulation on the pitot tube can obstruct airflow, leading to erroneous readings. By incorporating a heating element, the pitot tube can effectively prevent icing, ensuring that the airflow is unobstructed and measurements remain reliable. This integral feature enhances the safety and performance of the aircraft by providing consistent data to the pilot.

The use of the 28 VDC bus for power supply is standard in many aircraft systems, providing sufficient voltage for the heating elements without overwhelming other electrical systems. This ensures the pitot tube is heated as necessary while also maintaining the efficiency of the overall electrical system in the aircraft.