Approach and Visual Reference
During a circling VOR/DME approach, the pilot reported losing visual contact with the airport until the airplane was nearly above the runway at 600 feet above ground level (AGL). At that point, the pilot initiated a descending, tight right turn to maintain sight of the runway.
Maneuvers and Loss of Control
Descending below 300 feet, the pilot continued a steep turn on a 45-degree bearing relative to the runway to intercept the final approach path. As the pilot began to level the wings for landing, the aircraft suddenly descended. The right wing impacted the runway surface, and the airplane skidded off the side of the runway.
Weather Conditions
The pilot reported weather conditions of fog and drizzle during the approach.
Missed Approach Point
The published missed approach point for the VOR/DME approach was located 5 miles from the final approach fix and 0.7 miles northwest of the runway midpoint.