What function does the fuel selector valve serve in the TH-73A?

• A. It controls the fuel temperature
• B. It directs fuel flow to the engine
• C. It maintains fuel pressure in the lines
• D. It filters impurities from the fuel

Answer: (B)

The fuel selector valve in the TH-73A serves the crucial function of directing fuel flow to the engine. This component is integral in ensuring that the engine receives the correct amount of fuel from the chosen tank. By allowing the pilot to select between different fuel tanks, it helps manage fuel distribution and balance within the aircraft, which is essential for efficient operations and flight safety. Proper selection and functioning of the fuel selector valve directly impact engine performance, reliability, and overall operational capabilities of the aircraft, making it a vital part of the fuel system.

While managing fuel temperature, maintaining fuel pressure, and filtering impurities are important aspects of the fuel system overall, the specific role of directing fuel flow is what defines the primary function of the fuel selector valve.