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FAA EMERGENCY AIRWORTHINESS DIRECTIVE FOR SIKORSKY S76
USA, Some manufacturing defects which were responsible of several cracks on rotors of a few Sikorsky S76 helicopters convinced american FAA to issue Emergency Airworthiness Directive. Conditions of improper manufacture, if not corrected, could result in a root end pocket separating and impacting a main rotor or tail rotor blade and subsequent loss of control of the helicopter. Visual inspections required...
AVIONEWS - World Aeronautical Press Agency