# Proposed AD FAA-2017-0668: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-07-05
- Products: General Electric
- Product type: Engine
- Published: September 21, 2017, 82 FR 44127
- Comments due: October 26, 2017
- Became: [AD 2018-07-05](https://openairdocs.org/ad/2018-07-05)
- Docket: FAA-2017-0668 (https://www.regulations.gov/docket/FAA-2017-0668, where comments are filed)
- FR document: C1-2017-19250
- Official PDF: https://openairdocs.org/files/sha256/40/de/40de4a5d4eaf882bec95835a3f64a89c708092772fe65b8507471c809c069998 (from https://www.govinfo.gov/content/pkg/FR-2017-09-21/pdf/C1-2017-19250.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/09/21/C1-2017-19250/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/72BCD52AD034A219862581A2006DAC75.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0668

## Summary

We propose to adopt a new airworthiness directive (AD) for all General Electric Company (GE) CF6-80A, -80A1, -80A2, and -80A3 turbofan engines. This proposed AD was prompted by high cycle fatigue (HCF) cracking of the low-pressure turbine (LPT) stage 3 nozzles. This proposed AD would require replacement of the LPT stage 3 nozzles. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 21, 2017: Proposed rule (first notice), FR document C1-2017-19250, comments due Oct 26, 2017 (https://www.federalregister.gov/documents/2017/09/21/C1-2017-19250/airworthiness-directives-general-electric-company-turbofan-engines)

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