Airworthiness Directive · Amendment 39-10175 · Boeing Model 747 and 767 Series Airplanes Equipped With General Electric (GE) CF6-80C2 Engines
Boeing Model 747 and 767 Series Airplanes Equipped With General Electric (GE) CF6-80C2 Engines
Superseded. A later AD replaced this one: AD 98-08-23. Comply with the one in force.
Model 747 series airplanes having line positions 679 through 1117 inclusive, and Model 767 series airplanes having line positions 158 through 661 inclusive; equipped with General Electric (GE) CF6-80C2 engines, on which dribble flow fuel nozzles (DFFN's) having General Electric part number 9331M72P33, 9331M72P34, or 9331M72P41, have been installed; 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 revising the FAA-approved Airplane Flight Manual (AFM) to prohibit the use of certain fuels, and either replacing the existing placard on the door of the fueling control panel with a new placard; or replacing all dribble flow fuel nozzles (DFFN) with standard fuel nozzles, which terminates the requirements for a placard and AFM revision. This amendment is prompted by a report of an engine flameout during certification testing due to the use of JP-4 or Jet B fuel. The actions specified in this AD are intended to prevent such engine flameouts and consequent engine shutdown.
