INFLIGHT LOSS OF CONTROL DUE TO LOSS OF AIRSPEED AND SUBSEQUENT STALL WHEN THE PILOT'S SEAT BACK FAILED AND THE PILOT HUNG ONTO THE CONTROL WHEEL, RESULTING IN AN EXCESSIVE NOSE HIGH ATTITUDE.
— NTSB Determination
THE PILOT'S SEAT BACK BROKE JUST AFTER THE AIRPLANE BECAME AIRBORNE. THE PILOT TILTED AFT AND PULLED BACK ON THE CONTROL WHEEL. THE AIRCRAFT CLIMBED STEEPLY, TURNED RIGHT, STALLED, AND IMPACTED INVERTED. REMEDIAL ACTION WAS NOT POSSIBLE. THE FRACTURE WAS LOCATED ADJACENT TO A WELDED JUNCTION OF THE SEAT BACK ATTACH POINT. EXAMINATION REVEALED THE TUBE FRAME FAILED IN DUCTILE OVERLOAD WITH NO EVIDENCE OF CORROSION OF FATIGUE.
THE PILOT'S SEAT BACK BROKE JUST AFTER THE AIRPLANE BECAME AIRBORNE. THE PILOT TILTED AFT AND PULLED BACK ON THE CONTROL WHEEL. THE AIRCRAFT CLIMBED STEEPLY, TURNED RIGHT, STALLED, AND IMPACTED INVERTED. REMEDIAL ACTION WAS NOT POSSIBLE. THE FRACTURE WAS LOCATED ADJACENT TO A WELDED JUNCTION OF THE SEAT BACK ATTACH…
The accident on 1990-05-28 involved a Stinson 108-1, registration N77WC, at Athens, NY.
INFLIGHT LOSS OF CONTROL DUE TO LOSS OF AIRSPEED AND SUBSEQUENT STALL WHEN THE PILOT'S SEAT BACK FAILED AND THE PILOT HUNG ONTO THE CONTROL WHEEL, RESULTING IN AN EXCESSIVE NOSE HIGH ATTITUDE.
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