Which action occurs after the TOSA is reached?

When the TOSA (Target Open Space Altitude) is reached, it signifies a critical point in the approach phase of flight where the aircraft prepares to transition from a descent to stabilization in a specific flight configuration. During this phase, the appropriate response is for the aircraft to level off and clean up, which involves adjusting the aircraft’s configuration for landing.

Leveling off allows the pilots to stabilize the aircraft and ensures that it is flying at the appropriate altitude for the next stage of the approach. Cleaning up typically refers to retracting landing gear and ensuring that flaps are set to the correct position, optimizing aerodynamics for the eventual landing approach. This operation is essential to prepare the aircraft for a smooth and controlled descent into the landing phase.

Although the other options may seem plausible in different contexts, they do not accurately describe the immediate action taken upon reaching the TOSA. Thus, the chosen answer aligns correctly with standard operating procedures following the TOSA.