SIKORSKY S-70, S-70A and S-70C helicopters [Docket No. FAA-2013-0636; Directorate Identifier 2012-SW-065-AD; Amendment 39-17709; AD 2013-25-13] – establishes a new life limit based on a prorated formula for certain identified components (parts) installed on Model S-70, S-70A, and S-70C helicopters...

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