# Airworthiness Directives; CFM International, S.A. Turbofan Engines
> **Rule** · Final rule. · Published 2022-09-01 · Effective 2022-10-06 · 87 FR 53651
## Document
- **Document number:** 2022-18923
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 87 FR 53651
- **Publication date:** 2022-09-01
- **Effective date:** 2022-10-06
- **FAA docket:** Docket No. FAA-2022-0160
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) LEAP-1A model turbofan engines. This AD was prompted by reports of two in-flight shutdowns (IFSDs) and subsequent investigation by the manufacturer that revealed cracks in the high-pressure turbine (HPT) rotor stage 1 blades. This AD requires initial and repetitive borescope inspections (BSIs) of the HPT rotor stage 1 blades. Depending on the results of the BSIs, this AD requires either additional BSIs at reduced intervals or replacement of the HPT rotor stage 1 blades. This AD also requires sending the inspection results to CFM if any unserviceable finding is found. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/09/01/2022-18923/airworthiness-directives-cfm-international-sa-turbofan-engines)
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