Airworthiness Directives; Boeing Model 757 Series Airplanes Equipped With Rolls Royce Engines

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 757 series airplanes, that currently requires inspections to detect fatigue-related cracking or breakage of the hydraulic tubing support brackets located on the upper spar web in the engine struts; further inspection to detect related damage of the upper spar web, the fuel lines, and the hydraulic lines, as necessary; and repair or replacement of cracked or damaged parts. That AD was prompted by reports of fatigue-related cracks in the hydraulic tubing support brackets located on the upper spar web in the engine struts. The actions specified by that AD are intended to prevent such fatigue-related cracking, which could result in fuel or hydraulic fluid leakage into the interior of the engine strut and cause a fire. This amendment requires installation of a previously optional terminating action.