Airworthiness Directives; Boeing Model 767 Series Airplanes

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 767 series airplanes, that currently requires a one-time inspection to detect abrasion damage and installation discrepancies of the wire bundles located below the P37 panel, and corrective action if necessary. For airplanes already subject to the existing AD, this amendment requires inspecting to determine whether the existing location of a certain wire support standoff is adequate, relocating the wire support standoff if necessary, installing protective sleeving over the wire bundles, and installing wire bundle support clamps if necessary. This amendment also expands the applicability of the existing AD to include additional airplanes, and require inspecting the sleeving on certain wire bundles, and accomplishing corrective action if necessary, on those airplanes. The actions specified by this AD are intended to detect and prevent abrasion damage and correct installation discrepancies of the wire bundles located below the P37 panel, which could result in arcing to structure and consequent fire or loss of function of affected systems. This action is intended to address the identified unsafe condition.