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

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 737-300, -400, and -500 series airplanes, that requires inspection to detect damage of a wire bundle and clamp that are located in the electronic/electrical (E/E) equipment bay, and repair of the damaged wire bundle. That action also requires replacement of the existing steel clamp with a nylon clamp, and rearrangement of the clamp installation. This amendment 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 this 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.