Airworthiness Directive · Amendment 39-10522 · Boeing Model 747 and 767 Series Airplanes
Boeing Model 747 and 767 Series Airplanes
Model 747 series airplanes, line positions 0001 through 1145 inclusive, that have not been inspected in accordance with AD 96-26-06, amendment 39-9870 (reference Boeing Alert Service Bulletin 747-28A2204, dated December 19, 1996), or AD 97-26-07, amendment 39-10250 (reference Boeing Alert Service Bulletin 747- 28A2204, Revision 1, dated October 30, 1997); and Model 767 series airplanes, line positions 001 through 689 inclusive, and 691; certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 747 and 767 series airplanes. This action requires a one-time inspection to confirm the installation of Teflon sleeves over certain electrical wires inside conduits installed in the fuel tanks; and corrective actions, if necessary. This amendment is prompted by a report of missing Teflon sleeves, which protect the wiring insulation from chafing. The actions specified in this AD are intended to prevent such chafing, which could eventually expose the electrical conductor creating the potential for arcing from the wire to the conduit, and consequent fuel tank fire/explosion.
