NTSB Identification: IAD97FA023.
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Accident occurred Saturday, November 16, 1996 in ORANGE, VA
Probable Cause Approval Date: 08/29/2001
Aircraft: Beech 65-A90, registration: N814SW
Injuries: 3 Serious,8 Minor.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
The pilot was taking off with 10 jumpers onboard. At the rotation speed of 100 knots, he used elevator trim to rotate the airplane, but it did not lift off the runway. He continued moving the trim wheel violently to pitch the nose up, and attempted to pull back on the yoke, but the airplane collided with rising terrain off the end of the runway. A witness did not see any of the flight controls move during the pilot preflight inspection, and during the takeoff roll, he did not observe a nose up rotation of the airplane. The pilot reported that he removed a single pin control lock from the yoke during preflight. The Beech control lock consisted of two pins, two chains, and a U-shaped engine control lock. The pilot walked away from the wreckage after the accident. No control locks were found in the wreckage. However, the control column shaft exhibited distress signatures on the periphery of the hole where the control lock is installed. No other evidence was found of any other form of mechanical jamming, interference, or discontinuity with the flight controls. Investigators were unable to identify any potential source of interference, other than a control lock, that could have simultaneously jammed both pitch and roll control. According to the airplane's manufacturer, about 3 to 6 degree of trim would have been normal for the airplane's takeoff conditions.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot's inadequate preflight inspection and his failure to complete the pretakeoff checklist which resulted in a takeoff roll with the control lock in place. Full narrative available
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