AD FAA-2011-0939

This amendment adopts a new airworthiness directive (AD) for the specified Eurocopter model helicopters. This action requires inspecting the upper end fitting ball joints of the main rotor servocontrols for lateral play, and depending on the findings either repetitively inspecting the ball joint or replacing the servocontrol. This amendment is prompted by reports of noncompliant swaging of the end fitting ball joints on main rotor servocontrols. Investigation has shown that the swaging load applied to the ball joints was 1.3 metric tons instead of the specified 13 metric tons. The actions specified in this AD are intended to prevent failure of the upper end fitting ball joints of the main rotor servocontrols, failure of the upper end fittings, and loss of control of the helicopter.