Accident Overview
On 18 August 2000 at 1115Z, a Robinson R44 helicopter, registration ZS-RFB, was involved in an accident at a private game farm located 8 nautical miles north-east of Vaalwater, South Africa. The aircraft was being operated under a private licence. The pilot, who held a valid Private Pilot's Licence endorsed for the type, had accumulated 4,100 total flying hours, including 395 hours on the Robinson R44. There were three persons on board (1 pilot and 2 passengers). No injuries or fatalities were reported.
Sequence of Events
According to the pilot, a loss of engine power occurred, prompting a decision to perform a precautionary landing in an open area. However, video evidence did not support the reported loss of power. The video showed that the pilot held the helicopter in a hover and then landed in the vicinity of tall grass. The surrounding grass was dry and approximately 30 cm high.
Examination and Findings
The aircraft was serviceable prior to the accident based on available documentation. After the accident, the engine was partially dismantled and examined, but no defects were found that could have led to a loss of power or engine failure. Due to fire damage, it was not possible to examine the helicopter's fuel system or the engine's electrical system. The helicopter, along with a large area of grassland, was destroyed in the ensuing fire.
Probable Cause
The pilot landed the helicopter in the vicinity of tall grass. From the video, it would appear that the helicopter set fire to the surrounding grass, which in turn set the helicopter on fire.