Incident Overview
Approximately 20 minutes after departure, the engine began operating roughly. The pilot attempted to address the issue but was unsuccessful. While initiating a precautionary landing, the engine lost power, and the pilot was compelled to land in an open field.
Landing and Ground Impact
During the landing rollout, the aircraft encountered a ditch, resulting in the nose-over of the aircraft. The fuel selector was positioned on the right fuel tank. Post-incident examination revealed that approximately 9 gallons of fuel were drained from the left tank, whereas the right tank was empty.
Fuel Analysis
The fuel recovered from the aircraft exhibited a color and odor consistent with automotive gasoline. No supplemental type certificate (STC) authorizing the use of auto gas in this aircraft was reported.