# Airworthiness Directives; Leonardo S.p.a. Helicopters
> **Rule** · Final rule; request for comments. · Published 2026-02-03 · Effective 2026-02-18 · 91 FR 4843
## Document
- **Document number:** 2026-02139
- **Category:** airworthiness
- **Manufacturer:** Leonardo S.p.a.
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 91 FR 4843
- **Publication date:** 2026-02-03
- **Effective date:** 2026-02-18
- **FAA docket:** Docket No. FAA-2026-0021
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This AD was prompted by reports of a cracked main gearbox (MGB) support case. This AD requires revising the existing rotorcraft flight manual (RFM) for the helicopter. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/02/03/2026-02139/airworthiness-directives-leonardo-spa-helicopters)
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