# 2025-00207: Airworthiness Directives; CFM International, S.A. Engines

2025-00207, Airworthiness Directives; CFM International, S.A. Engines, is a Federal Register rule from an unnamed agency published 2025-01-08, effective 2025-02-12 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2025-00207
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-00207
- Title: Airworthiness Directives; CFM International, S.A. Engines
- Type: Rule
- Agencies: unknown
- Citation: unknown
- Published: 2025-01-08
- Effective: 2025-02-12
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## Summary

The FAA is making new rules for certain CFM LEAP-1B jet engines because some parts weren’t finished right, which could cause damage during early use. Engine owners must inspect specific seals and parts and replace them if needed to keep flights safe. These checks start February 12, 2025, and could cost some money but will stop bigger problems down the line.

## 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.

## Effects PRIA read

- Mandatory inspections and possible replacements: cost, high. If you own or operate one of the listed CFM LEAP-1B engines, you must do a visual inspection of the HPC stage 2 seal, a visual inspection of the forward arm seal teeth of the stage 3-4 blisk, and an eddy current inspection (ECI) of those teeth. Do these actions before the engine reaches 2,900 cycle…
- FAA estimated inspection and replacement costs: cost, medium. The FAA estimates this AD affects 31 engines on U.S.-registered airplanes. Estimated labor costs are $85 per work-hour: each visual inspection is 1 hour ($85) and the ECI is 4 hours ($340). If replacements are needed, the FAA estimates parts costs of $55,312 (replace HPC stage 2 seal; total cost pe…

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## Sources
- [2025-00207 on federalregister.gov](https://www.federalregister.gov/documents/2025/01/08/2025-00207/airworthiness-directives-cfm-international-sa-engines)
- [2025-00207 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-01-08/pdf/2025-00207.pdf)

## Related
- [Previous: 2025-00206, Civil Monetary Penalty Inflation Adjustment](https://policyrisk.com/federal-register/2025-00206)
- [Next: 2025-00208, Airworthiness Directives; General Electric Company Engines](https://policyrisk.com/federal-register/2025-00208)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-00207 (as of 2026-06-11).