# Proposed AD FAA-2020-0555: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-20-11
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 8, 2020, 85 FR 35021
- Comments due: July 23, 2020
- Became: [AD 2020-20-11](https://openairdocs.org/ad/2020-20-11)
- Docket: FAA-2020-0555 (https://www.regulations.gov/docket/FAA-2020-0555, where comments are filed)
- Project: AD-2020-00615-E
- FR document: 2020-12160
- Official PDF: https://openairdocs.org/files/sha256/df/0c/df0c9f6d0d9e2b30fb09d0269fd36229eaefeb7ca797159a9390b6c9ea8a9b69 (from https://www.govinfo.gov/content/pkg/FR-2020-06-08/pdf/2020-12160.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/06/08/2020-12160/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FE6269B0C9FEE70786258581004B1CCC.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0555

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-1B64/P2, -1B67/P2, - 1B70/P2, -1B70C/P2,-1B70/75/P2, -1B74/75/P2, -1B76/P2, -1B76A/P2, and GEnx-2B67/P 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 a certain stages 6-10 compressor rotor spool. This proposed AD would require the removal of certain HPT rotor stage 2 disk and the removal of a certain stages 6-10 compressor rotor spool before reaching their new life limits. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 8, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-12160, comments due Jul 23, 2020 (https://www.federalregister.gov/documents/2020/06/08/2020-12160/airworthiness-directives-general-electric-company-turbofan-engines)

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