# Airworthiness Directives; Leonardo S.p.a Helicopters
> **Rule** · Final rule; request for comments. · Published 2021-08-20 · Effective 2021-09-07 · 86 FR 46762
## Document
- **Document number:** 2021-17974
- **Category:** airworthiness
- **Manufacturer:** Leonardo S.p.a
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 46762
- **Publication date:** 2021-08-20
- **Effective date:** 2021-09-07
- **FAA docket:** Docket No. FAA-2021-0672
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model A109A, A109A II, A109C, A109E, A109K2, A109S, and AW109SP helicopters, having a certain rotor brake kit installed. This AD was prompted by a report of un-commanded activation of the rotor brake system before take-off due to a jammed rotor brake control cable and subsequent partially open brake control valve. This AD requires repetitive inspections of the rotor brake control cable and replacement of the rotor brake control cable, if necessary, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/08/20/2021-17974/airworthiness-directives-leonardo-spa-helicopters)
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