AGUSTA Model AB412 and AB412 EP, and BELL Model 412, 412CF, and 412EP helicopters with certain Dart high gear aft crosstubes [Docket No. FAA-2013-0145; Directorate Identifier 2012-SW-059-AD] – proposes to require adding a life limit of 10,000 landings to the crosstube and removing from service any...

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