AGUSTA Model AB412 and AB 412EB and Bell Model 412, 412CF and 412EP helicopters [Docket No. FAA-2013-0145; Directorate Identifier 2012-SW-059-AD; Amendment 39-17554; AD 2013-16-16] – requires, for affected helicopters with certain Dart high gear aft crosstubes installed, adding a life limit of 10...

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