# Airworthiness Directives; General Electric Company CT7-5, -7, and -9 Series Turboprop Engines
> **Rule** · Final rule. · Published 2005-09-19 · Effective 2005-10-24 · 70 FR 54835
## Document
- **Document number:** 05-17493
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 54835
- **Publication date:** 2005-09-19
- **Effective date:** 2005-10-24
- **FAA docket:** Docket No. FAA-2005-20944
## Abstract

The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) CT7-5A2, -5A3, -7A, -7A1, -9B, -9B1, and -9B2 turboprop engines, with stage 2 turbine aft cooling plate, part number (P/N) 6064T07P01, 6064T07P02, 6064T07P05, or 6068T36P01 installed. This AD requires a onetime eddy current inspection (ECI) of certain P/N stage 2 turbine aft cooling plate boltholes. This AD results from reports of six stage 2 turbine aft cooling plates found cracked during inspection. We are issuing this AD to prevent stage 2 aft cooling plate separation, resulting in uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/09/19/05-17493/airworthiness-directives-general-electric-company-ct7-5--7-and--9-series-turboprop-engines)
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