FAA Airworthiness Directive on Eurocopter AS350/355 Control Lever

The FAA is adopting a new airworthiness directive (AD) for the Eurocopter AS350 and AS355 to require inspecting for a crack in the control lever attachment yokes and, if needed, replacing the tail-rotor gearbox (TGB). The AD was prompted by the improper casting of TGB casing assemblies, which may lead to cracking. A crack in the control lever attachment yokes could cause a loss of tail-rotor pitch control and loss of control of the helicopter.