Incident Overview
A pilot reported that during the engine run-up, he moved his seat rearward to secure one of the doors and then readjusted the seat to its original position. Shortly after liftoff, the seat traveled aft, and the pilot lost control of the airplane. The airplane subsequently impacted trees in a nose-down attitude off one side of the runway.
Examination Findings
Post-accident examination of the seat latching mechanism revealed that it was intact, as were the seat tracks. Inspection of the latching holes indicated that they were elongated and exhibited scrape marks between the holes. The end of the latching pin was found to be rounded. Despite these observations, the seat latching mechanism subsequently operated normally during testing.
Maintenance History
The last inspection performed in accordance with the applicable Airworthiness Directive (AD) for the seat latch had been conducted two years prior to the accident.
Conclusion
The airplane was damaged during the impact with trees. No further information about injuries or fatalities was provided in the source.