Which of the following is NOT a function of a thermal anti-icing system?

Thermal anti-icing systems are designed primarily to prevent the formation of ice on critical components such as wings, control surfaces, and sometimes the windshield of an aircraft. The main objective is to ensure safe flight operations by preventing ice accumulation that could adversely affect aerodynamic performance and control.

The function of controlling engine temperatures is not a role of thermal anti-icing systems. Engine temperature control is typically managed through other systems, such as cooling systems or fuel flow management, which ensure that engines operate within safe thermal limits.

In contrast, preventing ice accumulation on wings, heating the windshield, and enhancing aerodynamic performance are directly related to the core purpose of thermal anti-icing systems, which is to maintain proper airflow and reduce the risks associated with ice during flight. By achieving these goals, thermal anti-icing systems contribute to overall flight safety and efficiency.