# Proposed AD FAA-2008-0827: General Electric Company (GE) CF6-80A Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-08-06
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 4, 2008, 73 FR 51604
- Comments due: November 3, 2008
- Became: [AD 2009-08-06](https://openairdocs.org/ad/2009-08-06)
- Docket: FAA-2008-0827 (https://www.regulations.gov/docket/FAA-2008-0827, where comments are filed)
- Project: 2008-NE-26-AD
- FR document: E8-20497
- Official PDF: https://openairdocs.org/files/sha256/e6/53/e6533cf8838e6aa438fe4f90fd1aab7c7ac48b910d65e12c68a97a9de0e01194 (from https://www.govinfo.gov/content/pkg/FR-2008-09-04/pdf/E8-20497.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/09/04/E8-20497/airworthiness-directives-general-electric-company-ge-cf6-80a-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/83DB88C339E16328862574BA004B490E.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0827

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for GE CF6-80A series turbofan engines with certain stage 1 high- pressure turbine (HPT) rotor disks, installed. This proposed AD would require removal from service of those stage 1 HPT rotor disks within 30 days after the effective date of the AD. This proposed AD results from the FAA learning that those disks are susceptible to cracks developing in the bottoms of the dovetail slots. We are proposing this AD to prevent cracks developing in the bottoms of the dovetail slots that could propagate to a failure of the disk and cause an uncontained engine failure and damage to the airplane.

## Notices in this docket

- Sep 4, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-20497, comments due Nov 3, 2008 (https://www.federalregister.gov/documents/2008/09/04/E8-20497/airworthiness-directives-general-electric-company-ge-cf6-80a-series-turbofan-engines)

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