Airworthiness Directives; Boeing Model 737-300, -400, and -500 Series Airplanes

摘要

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 737-300, - 400, and -500 series airplanes. This proposal would require inspection for damage of a wire bundle and clamp that are located in the electronic/electrical (E/E) equipment bay, and repair of any damaged wire bundle or clamp. This proposal also would require replacement of the existing steel clamp with a nylon clamp, and rearrangement of the clamp installation. This proposal is prompted by a report of fire in the E/E equipment bay due to electrical arcing caused by chafing of a wire bundle. The actions specified by the proposed AD are intended to prevent chafing of a wire bundle that could cause short circuiting of the wire bundle, and could result in smoke and fire in the E/E equipment bay.