LTE in B407  

LTE or Unanticipated Right Yaw. If one pays attention to performance charts, wind direction and velocity the loss of tail rotor athority is a non problem. There aren't any cases of loss of tail rotor authority if the aircraft is'nt operated over allowable performance gross weight and is operated within wind limitations. Some aircraft have a smaller margin of safety but all are safe if the pilot operates within the limitations. Buttom line, much like other aspects of safety, the pilot is generally going to be a big part of the problem in crashes.