What happened
The aircraft touched down approximately two-thirds of the way down the runway. During the landing roll, the aircraft struck a rut in the runway surface. The impact caused the plane to nosed over, and it came to rest on its back, located off the departure end of the runway.
The investigation
Investigation of the site revealed that the runway condition was a significant factor. According to FAA Flight Information Publication data for this airport, the runway is considered unusable after heavy rain and should be inspected prior to use. Additionally, the airport is not attended, meaning there is no on-site personnel to monitor or report immediate surface hazards.
Findings
The primary contributing factors were the presence of a rut in the runway surface and the failure to ensure the runway was suitable for landing given recent weather conditions. The lack of attended status at the airport likely contributed to the hazard remaining undetected.