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AD: General Electric Company Turbofan Engines

2020-13-04 Requires Updating EEC Software On GEnx-1B And GEnx-2B Engines

The FAA is superseding Airworthiness Directive (AD) 2017-09-06 for all General Electric Company (GE) GEnx-1B and GEnx-2B model turbofan engines.

AD 2017-09-06 required updating electronic engine control (EEC) full authority digital electronic control (FADEC) software on GEnx-1B and GEnx-2B turbofan engines and replacing a certain fan hub frame assembly part installed on GEnx-2B turbofan engines. This AD requires updating EEC software on GEnx-1B and GEnx-2B engines and replacing a certain fan hub frame assembly part installed on GEnx-2B engines. This AD was prompted by the development of a design change by GE to remove the unsafe condition. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective July 24, 2020.

Supplementary Information: The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2017-09-06, Amendment 39-18868 (82 FR 21111, May 5, 2017), (“AD 2017-09-06”). AD 2017-09-06 applied to all GE GEnx-1B and GEnx-2B model turbofan engines. The NPRM published in the Federal Register on November 19, 2019 (84 FR 63820). The NPRM was prompted by the development of a design change by GE to remove the unsafe condition. The NPRM proposed to require updating EEC FADEC software on GEnx-1B and GEnx-2B model turbofan engines and replacing a certain fan hub frame assembly part installed on GEnx-2B model turbofan engines. The FAA is issuing this AD to address the unsafe condition on these products.

FMI: www.regulations.gov

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