Background
The airplane had undergone extensive maintenance that included work on the control column. The upper half of the control column was replaced with a throw-over yoke, and the aileron system was rerigged. The pilot-in-command picked up the airplane after it had been tied down outside for three months.
Accident Sequence
According to a witness, the airplane lifted off the water and started a left bank which increased until the airplane struck the ground. The pilot, the sole person on board, was killed.
Investigation Findings
Post-accident examination revealed that the control cables at the base of the control column operated in reverse of the description in the maintenance manual. Complete control continuity could not be concluded because of the extensive post-impact fire, which destroyed the overhead bellcrank, pulley, and interconnect system.
The official probable cause findings include:
- Occurrence #1: Loss of control in flight during takeoff initial climb.
- Findings: (1) Aileron control incorrect; (2) Improper major repair by other maintenance personnel; (3) Inadequate preflight by the pilot in command.
- Occurrence #2: In-flight collision with terrain/water during uncontrolled descent.