# Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Turboprop Engines
> **Rule** · Final rule; request for comments. · Published 2021-11-03 · Effective 2021-11-18 · 86 FR 60550
## Document
- **Document number:** 2021-23879
- **Category:** airworthiness
- **Manufacturer:** GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 60550
- **Publication date:** 2021-11-03
- **Effective date:** 2021-11-18
- **FAA docket:** Docket No. FAA-2021-0836
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2018-16-10 which applied to certain GE Aviation Czech s.r.o. (GEAC) H80-200 model turboprop engines. AD 2018-16-10 required an adjustment of the engine push-pull control and replacement of the beta switch to prevent the propeller governor control from going to a negative thrust position. This AD requires an initial inspection and adjustment of the engine push-pull control and replacement of the beta switch. This AD also requires inspection and adjustment of the engine push-pull control after any maintenance, repair or modification that affects the push- pull control and installation of an improved push-pull control. This AD also expands the applicability to include GEAC H85-200 model turboprop engines with Avia Propeller AV-725 propellers installed. This AD was prompted by an accident involving an Aircraft Industries (AI) L 410 UVP-E20 airplane caused by one propeller going to a negative thrust position during the landing approach. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/11/03/2021-23879/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as)
---
*AI Analytics · CC0 1.0*