SIKORSKY Model S-92A helicopters [Docket No. FAA-2012-0715; Directorate Identifier 2012-SW-039-AD; Amendment 39-17122; AD 2012-14-08] – requires inspecting the main gearbox (MGB) for a crack. This AD is prompted by a crack discovered in the cored passage of the MGB housing, which may be indicated by...

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