What is the position of the engine anti-ice valves after an electrical failure?

The position of the engine anti-ice valves after an electrical failure is critical to understanding aircraft systems. In the event of an electrical failure, the engine anti-ice valves are designed to default to an open position. This design ensures that engine anti-ice protection remains available whenever needed, particularly in icy conditions, to prevent ice build-up on critical engine components during operation.

The rationale behind this design choice is safety; it is preferable for the valves to be open and provide anti-ice protection rather than risk ice formation that could affect engine performance. This default condition is a part of the redundancy built into aircraft systems to enhance operational safety.

In contrast, if the valves were to close or remain in their last position, it could lead to situations where ice could accumulate, potentially endangering the aircraft's performance and safety. Therefore, understanding that these anti-ice valves default to an open position helps pilots and maintenance crews prepare for emergency procedures associated with electrical failures.