Which action is essential when recovering from a "wing stall"?

When recovering from a wing stall, it is crucial to reduce the angle of attack. A stall occurs when the wing exceeds its critical angle of attack, leading to a loss of lift. To regain control and lift, the pilot must lower the nose of the aircraft. This action decreases the angle of attack, allowing the airflow over the wing to reattach, which is essential for restoring lift.

Increasing power may be beneficial in certain situations once the stall is recognized and the angle of attack is reduced, but it is not the immediate action required for recovery. A roll to recover can be a misinterpretation of the situation, as it does not directly address the stall condition. Pulling back on the yoke would further increase the angle of attack, exacerbating the stall condition rather than rectifying it. Therefore, reducing the angle of attack is the primary and most effective action in recovering from a wing stall.