What happened
On the morning of 2 June 2005, a Robinson R44 Astro, registered ZS-RFT, was involved in a controlled flight into terrain incident in Breyten. The pilot, who had recently completed training on this specific model, had hired the aircraft for personal use and had flown from a farm near Ermelo to a transport depot in Breyten.
Shortly after departing for a second destination near Middelburg, the pilot reported a sudden surge in engine power followed by a low rotor RPM warning. As the aircraft lost altitude, the pilot attempted to maneuver toward an open field for a precautionary landing. However, the flight path took the helicopter over a residential neighborhood. During this descent, the tail rotor blades struck a television antenna extending from the roof of a house on Neave Street. The impact caused the tail rotor blades to fracture and separate from the assembly, leading to a loss of directional control. The helicopter yawed sharply to the right and crashed in the street, eventually skidding into an empty lot where the main rotor blades struck a lamppost.
The investigation
Investigators examined the wreckage and the mechanical state of the aircraft. The engine, which remained undamaged during the impact, underwent bench testing; the results showed no mechanical discrepancies that would have prevented normal operation. Maintenance records indicated that the aircraft's last Mandatory Periodic Inspection (MPI) was completed on 20 April 2005, with only 40.4 flight hours accumulated since that service.
Findings
- The pilot permitted the main rotor RPM to decay as the aircraft transitioned into forward flight and moved out of ground effect.
- The loss of tail rotor control was directly caused by the impact with a residential TV antenna.
- The lack of immediate open landing space over the residential area prevented a successful precautionary landing before the collision occurred.