AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section. General Electric Turbine Engines - CF6 Series AD/CF6/64 Fuel Shroud Retaining Snap Ring 8/2007 Applicability: 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 CF6-80C2B1F CF6-80C2A2 CF6-80C2B2F CF6-80C2A3 CF6-80C2B4F CF6-80C2A5 CF6-80C2B5F CF6-80C2A8 CF6-80C2B6F CF6-80C2A5F CF6-80C2B6FA CF6-80C2B1 CF6-80C2B7F CF6-80C2B2 CF6-80C2B8F CF6-80C2B4 CF6-80C2D1F CF6-80C2B6 CF6-80C2L1F 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. Note 1: These engines are installed on, but not limited to, Airbus A300, A310, A330, Boeing 747, 767, and McDonnell Douglas MD11 aeroplanes. Note 2: 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 Drainless Fuel Manifold P/N (left side) (left side) 1303M31G04 1303M31G06 1303M31G07 1303M31G08 1303M31G10 1303M31G12 Drained Fuel Manifold P/N Drainless Fuel Manifold P/N (right side) (right side) 1303M32G04 1303M32G06 1303M32G07 1303M32G08 1303M32G10 1303M32G12 CF6-80 E1 Series Engines Drained Fuel Manifold P/N Drainless Fuel Manifold P/N (left side) (left side) 1700M34G01 1303M31G12 Drained Fuel Manifold P/N Drainless Fuel Manifold P/N (right side) (right side) 1700M35G02 1303M32G12 Requirement: 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. - 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 5 February 2007, to do the replacements. - 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 27 November 2006, to do the replacements. 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 11 January 2007; Revision 1, dated 19 April 2005; or the Original, dated 30 November 2004. Note 3: FAA AD 2007-11-20 Amdt 39-15077 dated 24 May 2007 refers. Compliance: At the next engine shop visit for any reason after the effective date of this AD, unless the actions have already been done. This Airworthiness Directive becomes effective on 2 August 2007. Background: This AD results from two events of external engine fuel leakage and a subsequent under-cowl engine fire. The issuing of this AD is intended to prevent an under-cowl engine fire and damage to the aeroplane during an engine high vibration event. David Punshon Delegate of the Civil Aviation Safety Authority 12 June 2007