# Proposed AD FAA-2006-25970: Turbomeca S.A. Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-23-17
- Products: Turbomeca
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 25, 2015, 80 FR 73681
- Comments due: January 25, 2016
- Became: [AD 2006-23-17](https://openairdocs.org/ad/2006-23-17)
- Docket: FAA-2006-25970 (https://www.regulations.gov/docket/FAA-2006-25970, where comments are filed)
- Project: 99-NE-12-AD
- FR document: 2015-29886
- Official PDF: https://openairdocs.org/files/sha256/21/d2/21d27d9d12b802c33f4cacf552a5575f1eaa868842aed0abbc4c9b7dae7f3bf6 (from https://www.govinfo.gov/content/pkg/FR-2015-11-25/pdf/2015-29886.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/11/25/2015-29886/airworthiness-directives-turbomeca-sa-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9BF7704A07EF367B86257F08005012D7.0001
- Page: https://openairdocs.org/proposed/FAA-2006-25970

## Summary

We propose to supersede airworthiness directive (AD) 2006-23- 17, which applies to certain Turbomeca S.A. Turmo IV A and IV C turboshaft engines. AD 2006-23-17 currently requires repetitive inspections of the centrifugal compressor intake wheel (inducer) blades for cracks and corrosion, replacement of parts that fail inspection, and replacement of the TU 197 standard centrifugal compressor. This proposed AD would require the same inspections but at revised intervals, add the replacement of the TU 215 standard centrifugal compressor, and require replacement of parts that fail inspection. We are proposing this AD to prevent failure of the centrifugal compressor inducer, which could lead to an uncontained blade release, damage to the engine, and damage to the airplane.

## Notices in this docket

- Nov 25, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-29886, comments due Jan 25, 2016 (https://www.federalregister.gov/documents/2015/11/25/2015-29886/airworthiness-directives-turbomeca-sa-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.