Accident Overview
During an aerial application maneuver, the airplane's fuel pressure dropped, and the engine RPM decreased to between 1,800 and 1,900 rpm. As a result, the airplane was unable to maintain altitude, prompting the pilot to initiate an emergency landing. The landing was hard, and the airplane slid to a stop. The pilot exited the airplane as a post-crash fire began.
Damage and Examination
Extensive thermal deformation was found throughout the airplane and engine. Following the accident, a detailed examination and teardown of the engine were conducted. No discrepancies were identified that would have precluded normal engine operation prior to impact.
Investigation Findings
The reason for the reported loss of engine power could not be determined. Despite thorough inspection, no mechanical or system failures were found that would explain the drop in fuel pressure and RPM. The investigation concluded that the engine was capable of operating normally before the accident sequence.