Primary finding
Probable cause
The pilot’s failure to maintain clearance of powerlines on final approach.
Investigator assessment
Analysis narrative
The pilot was on final approach when he collided with a set of unmarked powerlines that ran perpendicular to the runway. The airplane flipped over and impacted the ground resulting in substantial damage to the tail section. The pilot said he reviewed the airport facility directory prior to the flight and was aware that the runway had a displaced threshold and a set of powerlines located between the end of the runway and a section of pine trees, which were equal in height to the powerlines. He said that as he cleared the pine trees on final approach, he saw the powerlines and struck them “five feet too low.” The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.