What happened
On the morning of 19 March 2003, a Robinson R22-Beta helicopter, registered ZS-RBN, was conducting a private game viewing flight over a farm known as "Zuka" in KwaZulu-Natal. The flight was intended to be a local operation, departing from and returning to the same private farm. During the final stages of the approach to the landing site, the pilot identified power lines at a very close distance. In an attempt to avoid the obstruction, the pilot applied back pressure on the cyclic control. This maneuver caused the tail rotor to strike the power lines, leading to the subsequent crash of the aircraft.
The investigation
The investigation into the incident focused on the flight path and the pilot's actions during the landing sequence. Meteorological data provided by the pilot indicated that weather conditions were fine at the time of the occurrence. The investigation also reviewed the maintenance history of the Robinson R22-Beta, finding that all available records indicated the aircraft had been correctly maintained. There were 0 fatalities and 0 injuries resulting from the impact, though the helicopter suffered extensive structural damage.
Findings
- The primary cause of the accident was the pilot's failure to maintain an adequate lookout during the short final approach.
- The collision occurred because the power lines were only detected at a critically short distance, leaving insufficient time for an effective avoidance maneuver.
- The physical contact between the tail rotor and the electrical lines was the direct trigger for the loss of control and subsequent crash.