As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT SEAT SLID BACK ON LANDING CAUSING THE PILOT TO LOSE DIRECTIONAL CONTROL. THE FRONT LEFT ROLLER HOUSING WAS FOUND SPREAD OPEN TO .4687 INCH. THE SEAT RAIL MEASURED .5000 INCH. AD 87-20-03 HAD BEEN SIGNED OFF AS ACOMPLISHED APPROX 4 MONTHS EARLIER. THE FRONT RIGHT HOUSING WAS ALSO SPREAD OPEN. BOTH HOUSINGS WERE BELIEVED TO BE SPREAD OPEN PRIOR TO THE ACCIDENT.