Airworthiness Directives; General Electric Company Turbofan Engines

We propose to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) CF6-80C2L1F turbofan engines. This proposed AD was prompted by a reduction in the life limit of the affected engines which is the result of a revised operating profile. This proposed AD would require replacement of the high-pressure turbine (HPT) spacer/impeller, part number (P/N) 1539M12P02, at a newer, lower life limit. We are proposing this AD to correct the unsafe condition on these products.