# Proposed AD FAA-2010-0732: General Electric Company (GE) CT7-9C and -9C3 Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-23-20
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 23, 2010, 75 FR 43099
- Comments due: September 21, 2010
- Became: [AD 2010-23-20](https://openairdocs.org/ad/2010-23-20)
- Docket: FAA-2010-0732 (https://www.regulations.gov/docket/FAA-2010-0732, where comments are filed)
- Project: 2010-NE-04-AD
- FR document: 2010-17999
- Official PDF: https://openairdocs.org/files/sha256/cd/bd/cdbd961b96f45290a1c9bc3a4cd98829d495ee2de48e118c1e106aefae7fca30 (from https://www.govinfo.gov/content/pkg/FR-2010-07-23/pdf/2010-17999.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/07/23/2010-17999/airworthiness-directives-general-electric-company-ge-ct7-9c-and--9c3-turboprop-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/783B2031F63598C286257769004FEBAA.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0732

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for GE CT7-9C and -9C3 turboprop engines with certain serial number (S/ N) gas generator turbine (GGT) shafts, part number (P/N) 6068T44P02, installed. This proposed AD would require inspecting the GGT shaft for nonconforming land balance-cuts, and if found, removing the shaft from service. This proposed AD results from reports of a manufacturing quality problem. We are proposing this AD to detect nonconforming GGT shaft land balance-cuts, which could result in the shaft failing before its published life limit, and which could result in an uncontained engine failure and damage to the airplane.

## Notices in this docket

- Jul 23, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-17999, comments due Sep 21, 2010 (https://www.federalregister.gov/documents/2010/07/23/2010-17999/airworthiness-directives-general-electric-company-ge-ct7-9c-and--9c3-turboprop-engines)

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