Airworthiness Directive · Amendment 39-9507 · The Boeing Company Airplanes
The Boeing Company Airplanes
This AD applies to The Boeing Company 747-400 Series, 747-400D Series, 747-400F Series.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 series airplanes. This action requires an inspection for damage of the fuel tube located in the forward engine strut, and repair, if necessary; installation of a new support bracket and clamps on the power feeder conduit; and an inspection for proper positioning of the power feeder conduit in each engine strut, and adjustment, if necessary. This amendment is prompted by reports of worn fuel tubes that were caused by the power feeder conduit moving and touching the fuel tube. The actions specified in this AD are intended to prevent wear of the fuel tube, which could result in a fuel leak in the engine strut and a consequent fire hazard.
