Airworthiness Directives; Boeing Model 767 Series Airplanes

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing 767 series airplanes, that currently requires inspections and various follow-on actions to detect cracking and corrosion of the aft trunnion of the outer cylinder of the main landing gear (MLG). That action also provides for the optional termination of the inspections by repairing the outer cylinder and installing new aft trunnion bushings. That AD was prompted by reports of failure of several MLG due to fracture of the aft trunnion outer cylinder. This amendment requires operators to implement the previously optional terminating action. The actions specified by this AD are intended to prevent the collapse of the MLG due to stress corrosion cracking of the aft trunnion of the outer cylinder.