Which component of the TH-73 is critical for ice protection during flight?

• A. Windshield defroster
• B. Pitot tube heating element
• C. Rotor blade de-icer
• D. Fuel heater

Answer: (B)

The pitot tube heating element plays a crucial role in ice protection during flight because it ensures that the pitot tube, which measures airspeed, remains free from ice accumulation. If ice were to form on the pitot tube, it could obstruct the accurate measurement of airspeed, leading to potential flight control issues and jeopardizing the safety of the aircraft. The heating element works to prevent ice from building up, allowing the instrumentation to function properly even in adverse weather conditions.

While the other components listed serve important functions, they do not specifically target the critical need to maintain accurate airspeed readings in icy conditions. The windshield defroster helps clear visibility for the pilots, the rotor blade de-icer ensures the blades maintain performance and control by preventing ice build-up, and the fuel heater ensures fuel performance in cold temperatures. However, accurately maintaining airspeed is essential for safe flight operations, which is why the pitot tube heating element is deemed critical for ice protection.