# Airworthiness Directives; General Electric Company (GE) CT7-9C and -9C3 Turboprop Engines
> **Rule** · Final rule. · Published 2010-11-17 · Effective 2010-12-22 · 75 FR 70096
## Document
- **Document number:** 2010-28449
- **Category:** airworthiness
- **Manufacturer:** General Electric Company (GE) CT7-9C and -9C3 Turboprop
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 75 FR 70096
- **Publication date:** 2010-11-17
- **Effective date:** 2010-12-22
- **FAA docket:** Docket No. FAA-2010-0732
## Abstract

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires inspecting certain serial number (S/N) gas generator turbine (GGT) shafts for nonconforming land balance-cuts, and if found, removing the shaft from service. This AD was prompted by reports of a manufacturing quality problem. We are issuing 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/11/17/2010-28449/airworthiness-directives-general-electric-company-ge-ct7-9c-and--9c3-turboprop-engines)
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