Wills, Michael Vincent

Male·Multiple injuries due to helicopter crash caused by in-flight failure of rear stabiliser assembly conical mount

Michael Wills, an experienced pilot, died when his experimental Cicare helicopter crashed on 12 May 2014 while conducting cattle spotting in Central Queensland. Investigation revealed the rear stabiliser assembly failed in-flight due to metal fatigue caused by excessive vibration from a defective tail rotor gearbox output bearing. The gearbox exhibited excessive bearing play that quickly caused tail rotor imbalance requiring frequent rebalancing. The stabiliser conical mount, unable to withstand this non-designed vibration, developed fatigue cracks in hidden areas inaccessible to visual inspection, eventually failing catastrophically. Clinical/technical lessons: design defects in critical components may not be apparent through standard inspections; hidden failure modes require proactive investigation; and regulatory bodies must act when multiple similar failures occur (5% of this model crashed globally). The manufacturer and distributor failed to engage constructively in safety investigations.