# Airworthiness Directives; CFM International, S.A. Engines
> **Rule** · Final rule. · Published 2025-03-04 · Effective 2025-04-08 · 90 FR 11116
## Document
- **Document number:** 2025-03459
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 90 FR 11116
- **Publication date:** 2025-03-04
- **Effective date:** 2025-04-08
- **FAA docket:** Docket No. FAA-2024-2424
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) Model LEAP-1A, LEAP-1B, and LEAP- 1C engines. This AD was prompted by a manufacturer investigation that revealed a quality escape for low-pressure turbine (LPT) disks made from forgings with nonconforming grain size. This AD requires removal and replacement of the LPT stage 4 and stage 5 disks. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/03/04/2025-03459/airworthiness-directives-cfm-international-sa-engines)
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