# Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Engines
> **Rule** · Final rule. · Published 2024-02-22 · Effective 2024-03-28 · 89 FR 13265
## Document
- **Document number:** 2024-03562
- **Category:** airworthiness
- **Manufacturer:** GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 89 FR 13265
- **Publication date:** 2024-02-22
- **Effective date:** 2024-03-28
- **FAA docket:** Docket No. FAA-2023-2002
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2021-13-07 for all GE Aviation Czech s.r.o. (GEAC) (type certificate previously held by WALTER Engine a.s., Walter a.s., and MOTORLET a.s.) Model M601D-11, M601E-11, M601E-11A, M601E-11AS, M601E-11S, and M601F engines. AD 2021-13-07 required recalculating the life of critical parts and, depending on the results of the recalculation, replacing those critical parts. AD 2021-13-07 also required replacing a certain compressor case. Since the FAA issued AD 2021-13-07, the manufacturer published the airworthiness limitations section (ALS) of the existing engine maintenance manual (EMM), which includes the calculations for the life of critical parts addressed by AD 2021-13-07 and prompted this AD. This AD continues to require the replacement of a certain centrifugal compressor case. This AD also includes an additional part number as an option for the replacement, and limits the applicability of this AD, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/02/22/2024-03562/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as)
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