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 replacing the ground support bracket(s); and rerouting the ground cables of the galley external power and main external power, or ground cables of the main external power; as applicable. This action would require a general visual inspection of the ground cables of the main external power and galley external power for excessive length, as applicable; and corrective actions, if necessary. This proposal is prompted by the FAA's determination that currently required actions may not adequately address the identified unsafe condition. The actions specified by the proposed AD are intended to prevent arcing and heat damage to the attachment points of the main external and galley power receptacle ground wire, insulation blankets outboard and aft of the receptacle area, and adjacent power cables, which could result in smoke and fire in the forward cargo compartment.