# Airworthiness Directives; CFM International, S.A. Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2022-07-20 · Effective 2022-08-04 · 87 FR 43209
## Document
- **Document number:** 2022-15391
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 87 FR 43209
- **Publication date:** 2022-07-20
- **Effective date:** 2022-08-04
- **FAA docket:** Docket No. FAA-2022-0877
## 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 non-synchronous vibrations resulting in more open clearances and potential hot gas ingestion into the high- pressure turbine (HPT) rotor cavity, which may result in thermal degradation of the HPT rotor interstage seal and HPT rotor stage 2 disk. This AD requires inspection of the stage 2 HPT nozzle assembly honeycomb and HPT stator stationary seal honeycomb. Depending on the results of the inspection, this AD requires replacement of the stage 2 HPT nozzle assembly honeycomb, HPT stator stationary seal, HPT rotor interstage seal, and HPT rotor stage 2 disk. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/07/20/2022-15391/airworthiness-directives-cfm-international-sa-turbofan-engines)
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