What is the fail-safe state for the Engine A/I system?

The Engine Anti-Ice (A/I) system is designed to prevent the formation of ice on the engine inlets and fan blades during critical phases of flight, especially in conditions where moisture and low temperatures are present. The fail-safe state of the Engine A/I system is essential for ensuring that the aircraft operates safely under potential icing conditions.

When the correct answer is ON, it indicates that the system is enabled to actively protect the engines from ice buildup. In this state, the anti-ice system is fully operational, allowing for appropriate heat to be generated to melt any forming ice. This function is crucial because if the system were to fail in a state where icing could occur, it could result in significant engine performance issues or even loss of thrust, potentially leading to hazardous situations.

In contrast, the other options do not fulfill the necessary criteria to maintain engine performance during icing conditions. For instance, OFF means that the system would not be active, which could lead to ice accumulation if the aircraft encounters icy atmospheric conditions. SAFE is not typically a recognized operational state for the Engine A/I system in the context of being engaged; it refers more to a general sense of security rather than a functional state of the system. AUTO indicates that the system would be functioning in