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

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 12, 2017, 82 FR 42752
- Comments due: October 27, 2017
- Docket: FA-2017-0668
- FR document: 2017-19250
- Official PDF: https://openairdocs.org/files/sha256/d4/79/d4795d6b77127035c9cf1e53a90ad16b940a2578766528efc1662ea2edff5a0e (from https://www.govinfo.gov/content/pkg/FR-2017-09-12/pdf/2017-19250.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/09/12/2017-19250/airworthiness-directives-general-electric-company-turbofan-engines
- Page: https://openairdocs.org/proposed/FA-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 12, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-19250, comments due Oct 27, 2017 (https://www.federalregister.gov/documents/2017/09/12/2017-19250/airworthiness-directives-general-electric-company-turbofan-engines)

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