# Proposed AD FAA-2004-19928: CFM International (CFMI) CFM56-5, -5A, -5B, and -5C Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-10-05
- Products: CFM International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 28, 2004, 69 FR 77677
- Comments due: February 28, 2005
- Became: [AD 2005-10-05](https://openairdocs.org/ad/2005-10-05)
- Docket: FAA-2004-19928 (https://www.regulations.gov/docket/FAA-2004-19928, where comments are filed)
- Project: 2004-NE-27-AD
- FR document: 04-28384
- Official PDF: https://openairdocs.org/files/sha256/13/f7/13f7da7d582ad58a3d5196f6cb780007bb8929385f57dcc3e498488f6c3c40d1 (from https://www.govinfo.gov/content/pkg/FR-2004-12-28/pdf/04-28384.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/12/28/04-28384/airworthiness-directives-cfm-international-cfmi-cfm56-5--5a--5b-and--5c-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/87BA996C737FCCA986256F7800549E34.0001
- Page: https://openairdocs.org/proposed/FAA-2004-19928

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for CFM International (CFMI) CFM56-5, -5A, -5B, and -5C series turbofan engines. This proposed AD would require removing certain part number (P/N) air turbine starters from service. This proposed AD results from several reports of failures of uncontained air turbine starters where high-energy particles were not contained within the containment feature of the starter. We are proposing this AD to prevent uncontained failures of air turbine starters, which could result in damage to the airplane.

## Notices in this docket

- Dec 28, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-28384, comments due Feb 28, 2005 (https://www.federalregister.gov/documents/2004/12/28/04-28384/airworthiness-directives-cfm-international-cfmi-cfm56-5--5a--5b-and--5c-series-turbofan-engines)

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