Incident Details
A pilot departed Marion without obtaining a weather briefing. During the approach, the pilot was advised that the last person making the approach had reported moderate to severe turbulence on final. The pilot was subsequently cleared to land and given wind conditions of 360 degrees at 30 knots, gusting to 40 knots. Additionally, the pilot was advised that another aircraft had reported a 20-knot windshear on final.
The pilot reported that after descending to 1,500 feet mean sea level (MSL), the aircraft encountered strong turbulence. The airspeed fluctuated wildly, ranging from stall speed to redline. Despite adjustments to the flaps and throttle, the pilot was unable to maintain control, and the airplane became uncontrollable.
Weather Conditions
Wind was reported as 360 degrees at 30 knots, gusting to 40 knots. A previous aircraft reported moderate to severe turbulence on final, and another reported a 20-knot windshear on final.
Pilot Actions
The pilot attempted to regain control by adjusting flap settings and throttle position, but these efforts were unsuccessful in counteracting the extreme turbulence and windshear encountered.