What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot reports that after he applied takeoff power and began his takeoff roll that the pilot seat slid aft. This resulted in a loss of control due to pilot pulling back on the yoke and being unable to reach the rudder/brake pedals.
This loss of control caused aircraft to depart the runway to the left, down an embankment towards a set of railroad tracks where the nose gear struck the tracks causing the plane to flip over, substantially damaging the aircraft.
FAA inspector's preliminary inspection of the wreckage showed that the pilot seat's left hand forward seat roller housing was not engaged with the seat track but was sitting on top of it. Whether the roller housing was in this position prior to takeoff thereby causing the accident or was a result of the accident is undetermined.
Subsequently measured the seat track & seat roller housing as per AD2011-10-09. Found all dimensions to be within the allowable dimensions in the AD. This should have precluded the seat roller housing becoming separated from the seat track during takeoff.
Also noted that there was light scarring on top of the seat track where the displaced housing would have sat if it had not been installed correctly. This light scarring was not present on the other three pilot seat tracks in the aircraft.
These observations and measurements would seem consistent with a seat that was installed improperly with the left forward seat roller housing not engaged with the seat track.
Reference ptrs# EA68 201901962
As the FAA filed it
PILOT REPORTS THAT AFTER HE APPLIED TAKEOFF POWER AND BEGAN HIS TAKEOFF ROLL THAT THE PILOT SEAT SLID AFT. THIS RESULTED IN A LOSS OF CONTROL DUE TO PILOT PULLING BACK ON THE YOKE AND BEING UNABLE TO REACH THE RUDDER/BRAKE PEDALS.
THIS LOSS OF CONTROL CAUSED AIRCRAFT TO DEPART THE RUNWAY TO THE LEFT, DOWN AN EMBANKMENT TOWARDS A SET OF RAILROAD TRACKS WHERE THE NOSE GEAR STRUCK THE TRACKS CAUSING THE PLANE TO FLIP OVER, SUBSTANTIALLY DAMAGING THE AIRCRAFT.
FAA INSPECTOR'S PRELIMINARY INSPECTION OF THE WRECKAGE SHOWED THAT THE PILOT SEAT'S LEFT HAND FORWARD SEAT ROLLER HOUSING WAS NOT ENGAGED WITH THE SEAT TRACK BUT WAS SITTING ON TOP OF IT. WHETHER THE ROLLER HOUSING WAS IN THIS POSITION PRIOR TO TAKEOFF THEREBY CAUSING THE ACCIDENT OR WAS A RESULT OF THE ACCIDENT IS UNDETERMINED.
SUBSEQUENTLY MEASURED THE SEAT TRACK & SEAT ROLLER HOUSING AS PER AD2011-10-09. FOUND ALL DIMENSIONS TO BE WITHIN THE ALLOWABLE DIMENSIONS IN THE AD. THIS SHOULD HAVE PRECLUDED THE SEAT ROLLER HOUSING BECOMING SEPARATED FROM THE SEAT TRACK DURING TAKEOFF.
ALSO NOTED THAT THERE WAS LIGHT SCARRING ON TOP OF THE SEAT TRACK WHERE THE DISPLACED HOUSING WOULD HAVE SAT IF IT HAD NOT BEEN INSTALLED CORRECTLY. THIS LIGHT SCARRING WAS NOT PRESENT ON THE OTHER THREE PILOT SEAT TRACKS IN THE AIRCRAFT.
THESE OBSERVATIONS AND MEASUREMENTS WOULD SEEM CONSISTENT WITH A SEAT THAT WAS INSTALLED IMPROPERLY WITH THE LEFT FORWARD SEAT ROLLER HOUSING NOT ENGAGED WITH THE SEAT TRACK.
REFERENCE PTRS# EA68 201901962
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.