# Airworthiness Directives; CFM International, S.A. Turbofan Engines
> **Rule** · Final rule. · Published 2020-12-21 · Effective 2021-01-25 · 85 FR 82899
## Document
- **Document number:** 2020-27985
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 82899
- **Publication date:** 2020-12-21
- **Effective date:** 2021-01-25
- **FAA docket:** Docket No. FAA-2020-0729
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) LEAP-1A23, LEAP-1A24, LEAP- 1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, LEAP-1A35A model turbofan engines. This AD was prompted by an investigation by CFM that showed a subsurface anomaly in a part manufactured using the same material as the LEAP-1A high-pressure turbine (HPT) stage 2 disk. This AD requires an ultrasonic inspection (UI) of the HPT stage 2 disk and replacement of any HPT stage 2 disk that fails the UI with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/12/21/2020-27985/airworthiness-directives-cfm-international-sa-turbofan-engines)
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