# Airworthiness Directives; Leonardo S.p.a. Helicopters
> **Rule** · Final rule; request for comments. · Published 2021-09-03 · Effective 2021-09-20 · 86 FR 49470
## Document
- **Document number:** 2021-19032
- **Category:** airworthiness
- **Manufacturer:** Leonardo S.p.a.
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 49470
- **Publication date:** 2021-09-03
- **Effective date:** 2021-09-20
- **FAA docket:** Docket No. FAA-2021-0718
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This AD was prompted by the results of a fatigue review. This AD requires establishing a life limit for certain part-numbered high landing gear aft crosstubes. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/03/2021-19032/airworthiness-directives-leonardo-spa-helicopters)
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