What happened
On 13 July 2014, a private pilot was preparing for a flight from Kroon Airfield to Crosswind Airfield in a Thunderbird MK II, registration ZU-ADR. After completing standard engine run-up checks with no abnormalities noted, the pilot lined up on Runway 11 for departure.
Upon applying full throttle, the aircraft began its takeoff roll. However, the pilot initiated rotation before the aircraft had reached the required minimum rotation speed of 37mph. At an altitude of approximately 10ft AGL, the aircraft became unstable. Realizing the aircraft was only halfway down the runway, the pilot decided to attempt a landing back on the same runway. This resulted in a hard landing in a nose-low attitude, causing the undercarriage to collapse.
The investigation
The investigation examined the flight sequence, the pilot's actions, and the environmental conditions at the time of the incident. The pilot, who was uninjured and evacuated the aircraft without assistance, stated that the premature rotation was an attempt to avoid the sun's rays, which were shining directly into his eyes during the takeoff roll.
Investigators reviewed the aircraft's technical specifications and found that the Thunderbird MK II was within its maximum takeoff weight limitations. Meteorological data indicated clear visibility and calm winds, confirming that weather conditions were not a contributing factor to the event.
Findings
- The pilot was properly licensed and qualified for the operation.
- The pilot performed a premature rotation, which triggered a stall buffet and rendered the aircraft unstable.
- The primary cause of the incident was a hard landing resulting from poor technique.
- The pilot's decision to land on the remaining runway length contributed to the impact.