Airworthiness Directives; General Electric Company Turbofan Engines

The FAA is superseding Airworthiness Directive (AD) 2005-23-09 for all General Electric Company (GE) CF6-80E1A1, -80E1A2, -80E1A3, - 80E1A4, and -80E1A4/B model turbofan engines. AD 2005-23-09 required initial and repetitive fluorescent-penetrant inspections (FPI) of certain areas of high-pressure compressor (HPC) cases, part number (P/ N) 1509M97G07 and P/N 2083M69G03. This AD requires an update of the Airworthiness Limitations Section (ALS) of GE Engine Manual GEK99376 and the operator's existing continuous airworthiness maintenance program (CAMP). This AD was prompted by GE performed an updated lifing analysis on the HPC case. As a result, GE found additional locations on the cases requiring FPI, revised the inspection interval for performing FPI of the existing location, and added an additional P/N HPC case that requires inspection. The FAA is issuing this AD to address the unsafe condition on these products.