EASA Issues Airworthiness Directive for Eurocopter Helicopters to Address Ground Resonance Risk

Summary

The European Aviation Safety Agency (EASA) has issued an airworthiness directive (AD) for Eurocopter France Model AS-350B, BA, B1, B2, C, D, and D1, and AS-355E, F, F1, F2, and N helicopters, requiring inspections of main rotor head components, main gearbox suspension bars, and ground resonance prevention system components. The directive aims to prevent ground resonance, which could lead to failure of main rotor head or main gearbox suspension components and loss of helicopter control.