# Airworthiness Directives; Leonardo S.p.a. Helicopters
> **Rule** · Final rule. · Published 2021-07-23 · Effective 2021-08-27 · 86 FR 38914
## Document
- **Document number:** 2021-15481
- **Category:** airworthiness
- **Manufacturer:** Leonardo S.p.a.
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 38914
- **Publication date:** 2021-07-23
- **Effective date:** 2021-08-27
- **FAA docket:** Docket No. FAA-2021-0375
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by two events of uncommanded emergency flotation system (EFS) deployment during flight. This AD requires replacing certain part- numbered EFS control panels and prohibits installing them. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/07/23/2021-15481/airworthiness-directives-leonardo-spa-helicopters)
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