Accident Details
The aircraft was in a normal climb after takeoff when it pitched up to a 70° to 80° attitude, stalled, dropped the right wing, then leveled the wings and hit the ground in a near-flat attitude. The weight and center of gravity were within limits. No preimpact problems were found that could cause an inadvertent pitch-up.
Pilot Account
The pilot's only memory is that he could not get the control column far enough forward to stop the pitch-up.
Seat Examination
The pilot's seat was found in the full forward position with the right locking pin in the locking hole and the left pin 1/4 inch forward of the front locking hole. No visible marks were observed on either locking pin. Deep scratches were found on the sides of the rail where the seat attachments normally slide back and forth during adjustment. Examination of the outboard side recessed surface near the aft end revealed a fresh scratch.
Injuries
The pilot, who was the sole occupant on board, was seriously injured.
Investigation Findings
The official findings noted a loss of control during the initial climb. The seat was found unlocked, and the pilot had not followed the checklist. The pilot inadvertently initiated a pull-up, leading to an inadvertent stall.