What happened
On 20 February 2011, a private flight departing from Kitty Hawk Aero Estate Airfield experienced a sudden mechanical failure. While the pilot was increasing speed during takeoff, the engine began to splutter, which was immediately followed by a complete loss of power.
In response to the power loss, the pilot initiated an autorotation emergency landing procedure. An open area of veld south of the airfield was identified as a suitable landing site. As the Enstrom 280 FX approached the ground, the pilot attempted to flare the aircraft to cushion the impact. However, the landing was hard, causing the helicopter to strike the ground and roll onto its right side. The impact was severe enough that the main rotor blades struck the tail boom, severing the assembly and causing significant structural damage to the airframe, including the destruction of the skids, windscreen, and rotor components.
Despite the substantial damage to the aircraft, there were no injuries to the pilot or the passenger.
The investigation
SACAA AIID investigators examined the wreckage and the engine to identify the source of the power loss. A ground-run test was performed on the engine at various power settings, including maximum power, and the engine operated smoothly without any detectable anomalies.
Investigators also checked the fuel system for contamination. The right-hand fuel tank was found to be full, and testing revealed no signs of contaminated fuel. The left-hand tank was empty, having been depleted during the flight. The investigation confirmed that all aircraft documentation, including the Certificate of Airworthiness, was valid, and the helicopter had been maintained by an approved maintenance organization. The aircraft had undergone a mandatory periodic inspection only 0.6 hours prior to the accident.