SIKORSKY Model S-64F helicopters [Docket No. FAA-2012-0689; Directorate Identifier 2009-SW-065-AD; Amendment 39-17301; AD 2012-26-06] – supersedes an existing AD, which requires inspections, rework, and replacement, if necessary, of the main gearbox (MGB) second stage lower planetary plate (plate)...

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