What is the primary stall recovery procedure for an aircraft?

The primary stall recovery procedure involves lowering the nose and applying full power. During a stall, the aircraft has lost lift due to inadequate airflow over the wings, often caused by an excessive angle of attack. By lowering the nose, the pilot reduces the angle of attack, allowing the wings to regain sufficient airflow, which helps restore lift.

Applying full power is crucial because it helps to overcome the drag and facilitates a quicker recovery back to level flight. The increase in power contributes to greater airflow over the wings, which enhances performance and helps to prevent a complete stall. This procedure is fundamental for maintaining control of the aircraft and safely transitioning out of a stall condition.

In contrast, shifting weight to the rear and reducing throttle is not a standard recovery technique and can actually exacerbate the situation by increasing the angle of attack further. Increasing altitude and reducing speed does not directly address the stall; instead, it is generally more effective to maintain or increase speed to re-establish lift. Lastly, turning the aircraft sharply can lead to loss of control or worsened stall conditions, as a stall can occur at any bank angle depending on the aircraft's configuration and speed. Thus, the focused recovery procedure is essential for effectively addressing and recovering from a stall.