Airworthiness Directive · Amendment 39-12517 · Boeing Model 767 Series Airplanes Powered by Pratt & Whitney Model PW4000 Series Engines
Boeing Model 767 Series Airplanes Powered by Pratt & Whitney Model PW4000 Series Engines
Model 767 series airplanes, line numbers 1 through 821, equipped with Pratt & Whitney PW4000 series engines; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 767 series airplanes, that requires a one-time detailed visual inspection of certain wire bundles located in the aft section of the strut forward fairing panel of both engine struts to detect chafing damage, and repair or replacement of wiring, if necessary. This amendment also requires replacement of wires repaired by splicing and damaged wires that require splicing, and replacement of the support brackets of the existing wire bundles with new brackets and clamps, which would terminate the existing requirements. The actions specified by this AD are intended to prevent the potential for dual wire faults from grounded, separated, or shorted wires; which could result in inadvertent takeoff thrust overboost, in- flight loss of thrust, or engine shutdown.
