Rotor drive belt failures involving Robinson R22, VH-8H8 and R22, VH-HFQ, near Argadargada Aerodrome, Northern Territory, and Chillagoe Aerodrome, Queensland, on 15 and 23 November 2025

Summary

The ATSB is investigating suspected rotor drive belt failures involving 2 Robinson R22s, registered VH-8H8 and VH-HFQ, near Argadargada Aerodrome, Northern Territory, and Chillagoe Aerodrome, Queensland, on 15 November 2025 and 23 November 2025.

During cruise for mustering, the pilot and passenger of VH-8H8 noticed a smell of burning rubber and the pilot thought the rotor drive belts had failed. The engine over sped and the pilot conducted an autorotation. The helicopter subsequently collided with terrain resulting in substantial damage.

During cruise on a private flight, the pilot and sole occupant of VH-HFQ detected an airframe vibration and observed an abnormal rotor RPM indication, before conducting an autorotation and forced landing. The helicopter landed hard and the pilot observed a rotor belt on the ground. The helicopter was subsequently destroyed by post‑impact fire.

The ATSB has examined and analysed recovered components, maintenance records, and information from the occurrence pilots, maintenance personnel and the helicopter manufacturer. The evidence collection and analysis phases of the investigation are now complete and the ATSB is drafting the final report.

The final report will be released at the conclusion of the investigation. Should a critical safety issue be identified during the course of the investigation, the ATSB will immediately notify relevant parties, so that appropriate safety action can be taken.