# Proposed AD FAA-2021-0567: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-26-06
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 12, 2021, 86 FR 44321
- Comments due: September 27, 2021
- Became: [AD 2021-26-06](https://openairdocs.org/ad/2021-26-06)
- Docket: FAA-2021-0567 (https://www.regulations.gov/docket/FAA-2021-0567, where comments are filed)
- Project: AD-2021-00663-E
- FR document: 2021-16758
- Official PDF: https://openairdocs.org/files/sha256/47/77/4777b3c38e92c4de4f8306370cc39341fd9e214867e623f890a3879a73d1b579 (from https://www.govinfo.gov/content/pkg/FR-2021-08-12/pdf/2021-16758.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/08/12/2021-16758/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AD5DF50A81D78B358625872F00776F90.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0567

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) GE90 model turbofan engines. This proposed AD was prompted by two separate in-flight shutdowns (IFSDs) resulting from failure of the transfer gearbox (TGB) radial bevel gear (TGB radial gearshaft). This proposed AD would require visual inspection of the TGB radial gearshaft and, depending on the results of the inspection, replacement of the TGB radial gearshaft. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 12, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-16758, comments due Sep 27, 2021 (https://www.federalregister.gov/documents/2021/08/12/2021-16758/airworthiness-directives-general-electric-company-turbofan-engines)

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