Airworthiness Directives; General Electric Company Turbofan Engines

FAA / Federal Register · 2020-17594

The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) GE90-110B1 and GE90-115B model turbofan engines. This proposed AD was prompted by the detection of melt-related freckles in the billet, which may reduce the life limits of certain high-pressure turbine (HPT) rotor stage 2 disks and certain rotating compressor discharge pressure (CDP) HPT seals. This proposed AD would require replacement of the affected HPT rotor stage 2 disks and rotating CDP HPT seals. The FAA is proposing this AD to address the unsafe condition on these products.