Flight Details
The pilot was conducting low-level predator control operations in a slow flight configuration with flaps set to half. The aircraft was maneuvering at an altitude of 30 to 40 feet above ground level.
Sequence of Events
While performing a left turn from west to east, the pilot felt initial indications of the airplane entering a stall. In response, the pilot rolled the wings level. However, the aircraft then entered a secondary stall. Subsequently, the aircraft impacted the ground in a slight nose-down, wings-level attitude.
Conclusion
The accident sequence involved a stall during a low-altitude turn, followed by a secondary stall after the pilot attempted to level the wings. No further operational factors are described in the source.