What happened
On the morning of 23 December 2006, a pilot was conducting a local pleasure flight in a Bushbaby 450, registration ZU-BCU. After landing at Koeberg Flight Park (also known as Morningstar Aerodrome) from Fisantekraal Aerodrome, the pilot spent some time conversing with other aviators before preparing for a return departure.
Taking advantage of a south-south-west wind of 12 knots, the pilot utilized runway 20 for takeoff. During the initial climb, at an altitude of approximately 100 to 150 feet, the pilot initiated a left turn. An eyewitness observed the engine note change, suggesting a reduction in throttle, followed by an abrupt drop of the left wing. The aircraft subsequently entered a steep, nose-down dive, striking the ground roughly 200 meters beyond the threshold of runway 02. The impact resulted in the death of the pilot and the total destruction of the aircraft.
The investigation
An investigation by the SACAA AIID examined the wreckage and the mechanical state of the aircraft. A teardown inspection of the Rotax 912 engine revealed no mechanical defects, failures, or malfunctions that could have contributed to the accident. The engine, gearbox, and fuel systems were all found to be in good working order.
Investigators also reviewed the aircraft's maintenance records, confirming it had a valid Authority to Fly and had undergone its annual inspection recently. The pilot was found to be properly licensed with a valid medical certificate. Meteorological data confirmed clear visibility and stable conditions, with the wind consistent with the pilot's choice of runway.
Findings
- The primary cause of the accident was that the pilot stalled the aircraft while performing a low-level turn immediately after takeoff.
- The pilot deviated from standard procedures by executing a turn before reaching a safe altitude.
- The maneuver was performed as a downwind turn at low airspeed, which worsened the aircraft's aerodynamic stability.
- There was insufficient altitude available to recover once the wing dropped.
- The aircraft was mechanically sound and properly maintained at the time of the event.