# Proposed AD FAA-2021-0869: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-26-19
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 8, 2021, 86 FR 56217
- Comments due: November 22, 2021
- Became: [AD 2021-26-19](https://openairdocs.org/ad/2021-26-19)
- Docket: FAA-2021-0869 (https://www.regulations.gov/docket/FAA-2021-0869, where comments are filed)
- Project: AD-2021-00176-E
- FR document: 2021-21905
- Official PDF: https://openairdocs.org/files/sha256/bc/9c/bc9ca9788057d42337ad4c06efc622f5102e99828ab1e907712b2a0508a09039 (from https://www.govinfo.gov/content/pkg/FR-2021-10-08/pdf/2021-21905.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/10/08/2021-21905/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CD13614861B005D38625876800660916.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0869

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) CF34-8C and CF34-8E model turbofan engines. This proposed AD was prompted by a report of a quality escape during the manufacturing of a high-pressure turbine (HPT) rotor stage 1 disk. This proposed AD would require removing the HPT rotor stage 1 disk from service and replacing the HPT rotor stage 1 disk with a part eligible for installation. The FAA is proposing this AD to the unsafe condition on these products.

## Notices in this docket

- Oct 8, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-21905, comments due Nov 22, 2021 (https://www.federalregister.gov/documents/2021/10/08/2021-21905/airworthiness-directives-general-electric-company-turbofan-engines)

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