What should a pilot do if they hear the stall warning horn in the Warrior PA-28A?

When a pilot hears the stall warning horn in the Warrior PA-28A, the appropriate response is to reduce the angle of attack and add power to recover from a potential stall. The stall warning horn indicates that the aircraft is approaching a stall condition, which occurs when the wings can no longer generate sufficient lift due to a high angle of attack.

By reducing the angle of attack, the pilot is effectively lowering the nose of the aircraft and allowing the wings to regain lift. Adding power helps to increase airspeed, which further aids in recovering from the stall. This combination is crucial for safely returning the aircraft to controlled flight.

Other options, such as performing a left turn or increasing altitude, do not directly address the stall condition and could potentially exacerbate the situation. Landing as soon as possible is not appropriate unless there are other exigent circumstances, as it may prevent the pilot from executing the necessary recovery procedures to regain flight control.