Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 757 series airplanes. This proposal would require one-time inspections to verify proper installation and to detect chafing and/or damage of certain rerouted wire bundles; to verify if certain protective grommets are installed properly and to detect missing grommets; and various follow- on actions. This proposal is prompted by a report of smoke and fire in the lower left-hand side of the E1-1 rack of the electrical equipment bay due to chafing of wire bundles as a result of missing protective grommets. The actions specified by the proposed AD are intended to prevent chafing of wire bundles, which could result in smoke and fire at the E1-1 rack of the electrical equipment bay.