# Airworthiness Directives; CFM International, S.A. Turbofan Engines
> **Rule** · Final rule. · Published 2022-05-16 · Effective 2022-06-21 · 87 FR 29651
## Document
- **Document number:** 2022-10447
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 87 FR 29651
- **Publication date:** 2022-05-16
- **Effective date:** 2022-06-21
- **FAA docket:** Docket No. FAA-2021-1183
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all 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, and LEAP-1A35A model turbofan engines. This AD was prompted by the detection of melt-related freckles in the billet, which may reduce the life of certain compressor rotor stages 6-10 spools, high pressure turbine (HPT) rotor interstage seals, HPT rotor stage 2 disks, low pressure turbine (LPT) stage 1 disks, LPT stage 2 disks, LPT stage 3 disks, and LPT stage 4 disks. This AD requires revising the airworthiness limitations section (ALS) of the applicable CFM LEAP-1A Engine Shop Manual (ESM) and the operator's existing approved continuous airworthiness maintenance program (CAMP) to incorporate reduced life limits for these parts. This AD also requires the removal of certain LPT stage 4 disks identified by serial number (S/N) prior to their new life limits. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/05/16/2022-10447/airworthiness-directives-cfm-international-sa-turbofan-engines)
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