# Airworthiness Directives; CFM International, S.A. Engines
> **Rule** · Final rule. · Published 2025-01-08 · Effective 2025-02-12 · 90 FR 1365
## Document
- **Document number:** 2025-00207
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 90 FR 1365
- **Publication date:** 2025-01-08
- **Effective date:** 2025-02-12
- **FAA docket:** Docket No. FAA-2024-1898
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) Model LEAP-1B engines. This AD was prompted by a report of a quality escape involving certain high- pressure compressor (HPC) stage 2 seals manufactured without detailed finish machining, which could result in deeper rubs and mechanical damage to the seal teeth of the stage 3-4 compressor rotor blisk (stage 3-4 blisk) of the mating compressor rotor during initial operation. This AD requires a visual inspection of the HPC stage 2 seal, a visual inspection of the forward arm seal teeth of the stage 3-4 blisk, an eddy current inspection (ECI) of the forward arm seal teeth of the stage 3-4 blisk, and replacement of the HPC stage 2 seal and the stage 3-4 blisk, if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/01/08/2025-00207/airworthiness-directives-cfm-international-sa-engines)
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