2009-04-17: Long fixed core exhaust nozzle (LFCEN) assembly

2009-04-17 General Electric Company: Amendment 39-15823. Docket No. FAA-2006-24145; Directorate Identifier 2006-NE-06-AD. Effective Date (a) This airworthiness directive (AD) becomes effective April 2, 2009. Affected ADs (b) None. Applicability (c) This AD applies to General Electric Company (GE) CF6-45A, CF6-45A2, CF6-50A, CF6-50C, CF6-50CA, CF6-50C1, CF6-50C2, CF6-50C2B, CF6-50C2D, CF6-50E, CF6-50E1, CF6-50E2, and CF6-50E2B series turbofan engines with a long fixed core exhaust nozzle (LFCEN) assembly forward centerbody, part number (P/N) 1313M55G01 or G02, P/ N 9076M28G09 or G10, and aft centerbody P/N 1313M56G01 or 9076M46G05, installed. These engines are installed on, but not limited to, Airbus A300 series, Boeing 747 series, McDonnell Douglas DC-10 series, and DC-10-30F (KDC-10) airplanes. Unsafe Condition (d) This AD results from reports of separation of LFCEN assembly forward and aft centerbodies due to high imbalance engine conditions. This AD results from the GE issuing new service information. We are issuing this AD to prevent the forward and aft centerbody of the LFCEN assembly from separating due to high imbalance engine conditions, leading to damage to the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within 42 months after the effective date of this AD, unless the actions have already been done. (f) Replace the forward centerbody, P/N 1313M55G01 or G02, P/N 9076M28G09 or G10, and aft centerbody, P/N 1313M56G01 or 9076M46G05 with a forward and aft centerbody that have been modified using with the Accomplishment Instructions, Section 3, of GE Service Bulletin No. CF6-50 S/B 78-0244, Revision 1, dated March 13, 2008, CF6-50 S/B 78-0244, dated July 30, 2007, or CF6-50 S/B 78-0242, dated September 26, 2005. Alternative Methods of Compliance (g) The Manager, Engine Certification Office, has the authority to approve alternative methods of compliancefor this AD if requested using the procedures found in 14 CFR 39.19. Related Information (h) Contact Robert Green, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: robert.green@faa.gov; telephone (781) 238-7754; fax (781) 238-7199, for more information about this AD. Material Incorporated by Reference (i) None.