During the engine anti-ice ground check, how can you tell if the engine anti-ice is functioning?

During the engine anti-ice ground check, observing a rise in Interstage Turbine Temperature (ITT) indicates that the engine anti-ice system is functioning properly. When the anti-ice system is activated, it draws hot air from the engine to prevent ice from forming in critical areas, such as the engine inlet and compressor. This process requires energy, and as a result, the engines may experience an increase in temperature due to the additional work the engine must perform to maintain power and efficiency while compensating for the loss of airflow and cooling effect that the anti-ice system entails.

Monitoring system response during this check is crucial for ensuring the engine's reliability in icy conditions during flight. A rise in ITT confirms that the anti-ice system is operational, as it is utilizing engine bleed air and affecting engine performance metrics accordingly. Understanding the implications of these temperature changes is essential for pilots to assess engine health and functionality, particularly in environments where ice accumulation could impede safety.