# Proposed AD FAA-2004-18869: General Electric Company CF34-3A1 Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-18-16
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 16, 2004, 69 FR 50344
- Comments due: October 15, 2004
- Became: [AD 2005-18-16](https://openairdocs.org/ad/2005-18-16)
- Docket: FAA-2004-18869 (https://www.regulations.gov/docket/FAA-2004-18869, where comments are filed)
- Project: 2004-NE-23-AD
- FR document: 04-18642
- Official PDF: https://openairdocs.org/files/sha256/37/3c/373cfeebdda7ba79ad34840fa1fd25518d6b3e17e1b81c38bd83197813d172e8 (from https://www.govinfo.gov/content/pkg/FR-2004-08-16/pdf/04-18642.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/08/16/04-18642/airworthiness-directives-general-electric-company-cf34-3a1-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6B28D52D3F0863E086256EF2005975E4.0001
- Page: https://openairdocs.org/proposed/FAA-2004-18869

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for General Electric Company (GE) CF34-3A1 turbofan engines with certain high pressure turbine (HPT) rotating components installed. This proposed AD results from the discovery that the manufacturer removed certain part numbers of HPT rotating components from the Life Limits section of the CF34 Engine Manual, SEI-756. We are proposing this AD to clarify that these HPT rotating components have life limits in order to prevent low cycle fatigue (LCF) cracking and failure of those components, leading to uncontained engine failure and damage to the airplane.

## Notices in this docket

- Aug 16, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-18642, comments due Oct 15, 2004 (https://www.federalregister.gov/documents/2004/08/16/04-18642/airworthiness-directives-general-electric-company-cf34-3a1-turbofan-engines)

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