Primary finding
Probable cause
The pilot’s failure to maintain clearance from an excavator during low-altitude aerial application operations.
Investigator assessment
Analysis narrative
The aerial application airplane arrived at the field to apply product, and the pilot visually observed an unoccupied excavator parked near the field. The pilot decided to perform a spray pass up to the excavator and then climb over it and continue the spray pass. When the pilot approached the excavator, he misjudged its height, and the left tire impacted the boom arm. After the airplane struck the boom arm, it impacted the ground and slid about 300 yards which resulted in substantial damage to the wings, fuselage, and empennage. The airplane came to rest upright, and the pilot was able to egress from the airplane without further incident. The pilot reported there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.