Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 series airplanes, that currently requires an inspection to detect chafing or damage of the electrical wires leading to the terminal strips in the center accessory compartment (CAC) area, and corrective actions if necessary. That AD also currently requires revising the wire connection stack up of certain cable terminals at the electrical power center bays in the CAC, and replacing certain terminal strips with new strips and removing applicable nameplates at electrical power center bays. This action would require additional actions for improving the terminal strips and would revise the applicability of the existing AD to include additional airplanes. This proposal is prompted by issuance of revised service information. The actions specified by the proposed AD are intended to prevent arcing and sparking damage to the power feeder cables, terminalstrips, and adjacent structure, and consequent smoke and fire in the CAC.