# Airworthiness Directives; Agusta S.p.A. Helicopters
> **Rule** · Final rule; request for comments. · Published 2014-02-25 · Effective 2014-03-12 · 79 FR 10333
## Document
- **Document number:** 2014-01956
- **Category:** airworthiness
- **Manufacturer:** Agusta S.p.A.
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 79 FR 10333
- **Publication date:** 2014-02-25
- **Effective date:** 2014-03-12
- **FAA docket:** Docket No. FAA-2014-0035
## Abstract

We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB412 helicopters. This AD requires visually inspecting the main rotor swashplate outer ring (outer ring) for a crack and replacing that outer ring if a crack exists. This AD is prompted by two cases of cracks caused by fatigue on certain outer rings. These actions are intended to prevent the failure of the outer ring, which would lead to loss of main rotor blade pitch control and subsequently loss of helicopter control.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/02/25/2014-01956/airworthiness-directives-agusta-spa-helicopters)
---
*AI Analytics · CC0 1.0*