# Proposed AD FAA-2008-0808: General Electric Company CT58 Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-22-16
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 1, 2015, 80 FR 24852
- Comments due: June 30, 2015
- Became: [AD 2008-22-16](https://openairdocs.org/ad/2008-22-16)
- Docket: FAA-2008-0808 (https://www.regulations.gov/docket/FAA-2008-0808, where comments are filed)
- Project: 2008-NE-18-AD
- FR document: 2015-09932
- Official PDF: https://openairdocs.org/files/sha256/53/cf/53cff3cc8682494bd9b76b96c8f7ee8aa2ae0348803778fb9e4afb55a9df7838 (from https://www.govinfo.gov/content/pkg/FR-2015-05-01/pdf/2015-09932.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/05/01/2015-09932/airworthiness-directives-general-electric-company-ct58-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F3D42BA64B9CECD686257E38004CE3E3.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0808

## Summary

We propose to supersede airworthiness directives (ADs) 2001- 18-06 and 2008-22-16, which apply to certain General Electric Company (GE) CT58 turboshaft engines. ADs 2001-18-06 and 2008-22-16 require recalculating the lives of life-limited rotating parts using a Repetitive Heavy-Lift (RHL) multiplying factor and removal from service of parts that exceed the recalculated cyclic or hourly life limit. This proposed AD would consolidate ADs 2001-18-06 and 2008-22-16, and further reduce the life capability of certain parts. We are proposing this AD to prevent failure of life-limited rotating parts, uncontained part release, damage to the engine, and damage to the aircraft.

## Notices in this docket

- Jul 23, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-16883, comments due Sep 22, 2008 (https://www.federalregister.gov/documents/2008/07/23/E8-16883/airworthiness-directives-general-electric-company-ge-ct58-series-turboshaft-engines)
- May 1, 2015: Notice of proposed rulemaking (NPRM)., FR document 2015-09932, comments due Jun 30, 2015 (https://www.federalregister.gov/documents/2015/05/01/2015-09932/airworthiness-directives-general-electric-company-ct58-turboshaft-engines)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.