Fatal August 2005 Copterline S-76C+ crash controversy deepens as Sikorsky rejects NTSB verdict of main rotor servo failure

S-76C Copterline crash W250

Controversy over the cause of the fatal accident involving a Copter­line Sikorsky S-76C+ helicopter in August 2005 has deepened following Estonian accident investigators' confirmation of US National Transportation Safety Board (NTSB) findings that the probable cause was failure of a main rotor servo.

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