When will RSV thrust automatically be set on EICAS?

The correct choice relates specifically to the operation of the Engine Indicator and Crew Alerting System (EICAS) in conjunction with the Automatic Thrust Control (ATTCS) of the aircraft. When ATTCS is activated, it indicates that the maximum thrust has been set, which signifies a critical moment where thrust management is essential for performance and safety during operations, particularly during takeoff or go-around scenarios.

In this situation, the EICAS will display RSV (Reduced-Safety-Versus) thrust automatically to inform the crew that the engines are optimized to provide the necessary performance metrics without exceeding engine limits. This automatic setting ensures that pilots are constantly aware of the engine's operational capabilities and that the aircraft remains within operational safety margins.

The other options involve scenarios that do not initiate the automatic setting of RSV thrust. For instance, during normal takeoff, thrust is typically manually set without triggering RSV. When landing is imminent or when at or below 400 AGL, while critical phases of flight, those conditions do not specifically involve the automatic RSV thrust setting associated with maximum thrust scenarios. Thus, the correct answer accurately reflects the conditions under which RSV thrust is presented on the EICAS display.