Airworthiness Directives; Airbus Model A318-100 and A319-100 Series Airplanes; Model A320-111 Airplanes; Model A320-200, A321-200, A330-200, A330-300, A340-200, and A340-300 Series Airplanes; Model A340-541 Airplanes; and Model A340-642 Airplanes; Equipped With Certain Sogerma-Services Powered Seats

The FAA is adopting a new airworthiness directive (AD) for certain Airbus airplane models identified above. This AD requires inspecting to determine if a certain actuator is installed in the pilot's or co-pilot's seat, and doing applicable corrective actions. For certain actuators, the AD also requires replacing rotors on both vertical and horizontal movements with new rotors, and replacing the clutch cap with a new cap. This AD results from a report of heavy wear at the driving gear of the rotor shaft end of the electrical driven motor on certain actuators of the pilot's and co-pilot's seats. We are issuing this AD to prevent uncommanded movement of the pilot's or co- pilot's seat during takeoff or landing, which could result in interference with the operation of the airplane and consequent temporary loss of airplane control.