AD 2007-11-20 Airworthiness Directives; General Electric Company (GE) CF6-80 Series Turbofan Engines

This AD applies to the following General Electric Company (GE) CF6-80C2 series turbofan engines that have incorporated GE Service Bulletin (SB) No. CF6-80C2 S/B 73-0253, or were built with the drainless manifold configuration at the factory during production assembly, and, have one or more fuel shroud retaining rings, part number (P/N) J204P0084, installed: CF6-80C2A1, CF6-80C2A2, CF6-80C2A3, CF6-80C2A5, CF6-80C2A8, CF6-80C2A5F, CF6-80C2B1, CF6-80C2B2, CF6-80C2B4, CF6-80C2B6, CF6-80C2B1F, CF6-80C2B2F, CF6-80C2B4F, CF6-80C2B5F, CF6-80C2B6F, CF6-80C2B6FA, CF6-80C2B7F, CF6-80C2B8F, CF6-80C2D1F, CF6-80C2L1F. (d) This AD also applies to GE CF6-80E1A1, CF6-80E1A2, CF6-80E1A3, CF6-80E1A4, and CF6-80E1A4B turbofan engines that have incorporated GE SB No. CF6-80E1 S/B 73-0026, or were built with the drainless manifold configuration at the factory during production assembly, and, have one or more fuel shroud retaining rings, P/N J204P0084, installed. (e) These engines are installed on, but not limited to, Airbus A300, A310, A330, Boeing 747, 767, and McDonnell Douglas MD11 airplanes. (f) For reference, the following Table 1 lists fuel manifold production P/Ns. Table 1.—Reference of Fuel Manifold Production P/Ns     CF6-80C2 Series Engines Drained Fuel Manifold P/N (left side) Drainless Fuel Manifold P/N (left side) 1303M31G04 1303M31G06 1303M31G07 1303M31G08 1303M31G10 1303M31G12. Drained Fuel Manifold (right side) Drainless Fuel Manifold P/N (right side) 1303M32G04 1303M32G06 1303M32G07 1303M32G08 1303M32G10 1303M32G12. CF6-80 E1 Series Engines Drained Fuel Manifold P/N (left side) Drainless Fuel Manifold P/N (left side) 1700M34G01 1303M31G12. Drained Fuel Manifold P/N (right side) Drainless Fuel Manifold P/N (right side) 1700M35G02 1303M32G12.

You are responsible for having the actions required by this AD performed at the next engine shop visit for any reason after the effective date of this AD, unless the actions have already been done. Replacement of Fuel Shroud Retaining Snap Rings (i) Replace any fuel shroud retaining rings, P/N J204P0084, with a fuel shroud retaining snap ring, P/N 2186M12P01. Each engine has a total of 30 rings installed. (j) For CF6-80C2 series engines, use paragraphs 3.A. through 3.C.(1)(b)2, of GE SB No. CF6-80C2 S/B 73-0337, Revision 3, dated February 5, 2007, to do the replacements. (k) For CF6-80E1 series engines, use paragraphs 3.A. through 3.C.(1)(b)2, of GE SB No. CF6-80E1 S/B 73-0075, Revision 1, dated November 27, 2006, to do the replacements. SB Compliance Credit for CF6-80C2 Series Engines (l) This AD requires no further action if the fuel shroud retaining snap rings were installed in the CF6-80C2 series engines before the effective date of this AD using GE SB No. CF6-80C2 S/B 73-0337, Revision 2, dated January 11, 2007, Revision 1, dated April 19, 2005, or the Original, dated November 30, 2004. Alternative Methods of

This AD results from two events of external engine fuel leakage and a subsequent under-cowl engine fire. We are issuing this AD to prevent an under-cowl engine fire and damage to the airplane during an engine high vibration event.