What happened
On the morning of 15 October 2006, a private pilot departed from Springs Aerodrome in a Fournier RF-4D, registration ZS-UEM, arriving at Orient Aerodrome for a brief stop. After spending time on the ground with fellow aviators, the pilot prepared for a return flight to Springs.
Shortly after taking off from Runway 36L, the pilot performed a climbing right turn. Witnesses observed the aircraft flying straight and level at a low altitude of approximately 150 feet above ground level for a few seconds before the pilot initiated a wing-over maneuver. During this maneuver, the aircraft's airspeed decayed, leading to a stall and a right-hand spin. The aircraft impacted the grass surface of Runway 18R in an almost vertical, nose-down attitude. The impact resulted in one fatality and the total destruction of the aircraft.
The investigation
SACAA AIID investigators examined the wreckage and interviewed several eyewitnesses, including glider pilots present at the aerodrome. The investigation confirmed that the aircraft was well-maintained, having flown only four hours since its last annual inspection. All flight control surfaces were found to be intact and functional, and there was no evidence of mechanical failure or engine malfunction.
Investigators also analyzed the environmental conditions. Although the weather was clear, the high temperature of 25°C at the aerodrome's elevation resulted in a high density altitude of approximately 7,200 feet. This condition significantly impacts engine performance and aircraft handling characteristics.
Findings
- The pilot was performing a high-performance maneuver at an insufficient altitude of roughly 250 to 300 feet AGL.
- The execution of a wing-over maneuver at low altitude left the pilot with no margin for error.
- High density altitude likely affected the aircraft's performance during the maneuver.
- The pilot's decision-making and judgment regarding the safety of the maneuver were primary contributing factors.