What happens when the engine anti-ice system is activated?

When the engine anti-ice system is activated, airflow is redirected to the engine inlets, facilitating the prevention of ice accumulation on critical engine components. This process is crucial during flight in conditions where ice can form, particularly in the engine inlet area, which can impact engine performance and safety. By ensuring that warm air is directed to the engine inlets, the system mitigates the risk of ice buildup that could disrupt airflow, potentially leading to engine surges or reduced thrust efficiency. This proactive measure is vital for maintaining safe operational integrity during flight in icy conditions.

The other choices involve actions or outcomes that do not occur as a result of activating the engine anti-ice system. Fuel flow is not increased, engine thrust does not get reduced in an unfavourable manner, and surge protection remains functional to safeguard against potential engine surges.