# Proposed AD FAA-2017-0452: General Electric Company Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-19-20
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 16, 2017, 82 FR 27634
- Comments due: July 31, 2017
- Became: [AD 2017-19-20](https://openairdocs.org/ad/2017-19-20)
- Docket: FAA-2017-0452 (https://www.regulations.gov/docket/FAA-2017-0452, where comments are filed)
- Project: 2017-NE-14-AD
- FR document: 2017-12242
- Official PDF: https://openairdocs.org/files/sha256/55/16/551691ffd3c8ce87731cb015594ac1f4518f88c76506caea19e58f87ccc764c5 (from https://www.govinfo.gov/content/pkg/FR-2017-06-16/pdf/2017-12242.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/06/16/2017-12242/airworthiness-directives-general-electric-company-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/801D3A5D770C190786258141004C5CA3.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0452

## Summary

We propose to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) CT7-8A and CT7-9B model turboshaft engines. This proposed AD was prompted by reports from the manufacturer that the high-pressure compressor (HPC) impeller installed on these engines may have suffered from material degradation during the manufacturing process. This proposed AD would require removal of the affected HPC impellers. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 16, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-12242, comments due Jul 31, 2017 (https://www.federalregister.gov/documents/2017/06/16/2017-12242/airworthiness-directives-general-electric-company-turboshaft-engines)

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