# Airworthiness Directives; GE Aviation Czech s.r.o. Turboprop Engines (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.)
> **Rule** · Final rule. · Published 2020-07-27 · Effective 2020-08-31 · 85 FR 45062
## Document
- **Document number:** 2020-16122
- **Category:** airworthiness
- **Manufacturer:** GE Aviation Czech s.r.o. Turboprop
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 45062
- **Publication date:** 2020-07-27
- **Effective date:** 2020-08-31
- **FAA docket:** Docket No. FAA-2017-0967
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all GE Aviation Czech s.r.o. M601D-11, M601E-11, M601E-11A, M601E-11AS, M601E-11S, M601F, H80, H80-100, H80-200, H75-100, H75-200, H85-100, and H85-200 model turboprop engines. This AD was prompted by a review by the manufacturer that identified the possibility of a power turbine (PT) rotor overspeed and the uncontained release of PT blades. This AD requires installing a modified engine outlet system. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/07/27/2020-16122/airworthiness-directives-ge-aviation-czech-sro-turboprop-engines-type-certificate-previously-held-by)
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