Airworthiness Directives; Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 Helicopters

This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 helicopters, that requires inspecting the main rotor blade cuff attachment fitting in the area of the main rotor blade (blade) attachment bolts for cracks, and removing and replacing the blade if a crack is found. This amendment is prompted by a report of a crack in a blade cuff attachment fitting/spar assembly that was discovered during fatigue testing by the manufacturer. The actions specified by this AD are intended to prevent failure of a blade cuff attachment fitting at a bolt hole location, loss of a blade, and subsequent loss of control of the helicopter.