FAA issues Emergency Airworthiness Directive for Sikorsky’s S-92
March 23: In the wake of the loss of one of Cougar Helicopters’ S-92s in the North Atlantic off Newfoundland on March 12 along with 17 lives, the Federal Aviation Administration (FAA) issued an Emergency Airworthiness Directive (EAD) to all operators of the type.
The EAD has been prompted by the failure of two main gearbox filter bowl assembly mounting studs which were found to be broken during the fatal accident investigation in Canada. Prior to the accident, the manufacturer was investigating a July 2008 incident that also involved broken studs – in both cases, the broken studs resulted in rapid loss of oil. The failures have been tied to the original Titanium studs; therefore operators are urgently required to replace Titanium studs with steel versions before further flight.
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