As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C WAS INVOLVED IN AN ACCIDENT AT VAY. UPON LANDING, THE PILOT'S SEAT BACK DISCONNECTED AT THE LEFT HAND SIDE OF THE SEAT BACK ASSEMBLY ATTACH POINT ATTACHING BOLT SHEARED. UPON INSPECTION OF THE AIRCRAFT, THE BOLT HEAD HAD SHEARED OFF FROM THE SEAT BACK ASSEMBLY