What happened
During an en route flight, the pilot initiated an emergency landing procedure at McAlester for reasons that remain unspecified. As the aircraft touched down, it encountered a depression or gully on the ground surface. This impact caused the single-engine plane to flip over and come to rest upside down.
The accident resulted in significant structural damage, rendering the airframe beyond repair. All four individuals on board sustained injuries during the crash sequence. The pilot was identified as Lt Murry Witherby.
Findings
The specific mechanical or environmental factors that necessitated the emergency landing were not determined in the available records. The immediate cause of the accident was the aircraft striking a gully during the landing rollout, which led to the inversion of the airframe and subsequent damage.