Summary
We propose to supersede airworthiness directive (AD) 2013-08- 17 for Airbus Helicopters Model SA-365N, SA-365-N1, AS-365N2, AS 365 N3, and SA-366G1 helicopters. AD 2013-08-17 currently requires an initial and recurring inspections of the 9-degree fuselage frame for a crack and a repair of the frame if a crack exists. Since we issued AD 2013-08-17, additional information has prompted us to propose modifying the compliance times and expanding the inspection area of the 9-inch frame. These proposed actions are intended to detect a crack in the 9- degree frame to prevent loss of structural integrity and subsequent loss of control of the helicopter.