# Airworthiness Directives; Agusta S.p.A. Helicopters
> **Rule** · Final rule; request for comments. · Published 2015-06-09 · Effective 2015-06-24 · 80 FR 32451
## Document
- **Document number:** 2015-13343
- **Category:** airworthiness
- **Manufacturer:** Agusta S.p.A.
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 80 FR 32451
- **Publication date:** 2015-06-09
- **Effective date:** 2015-06-24
- **FAA docket:** Docket No. FAA-2015-1936
## Abstract

We are adopting a new airworthiness directive (AD) for certain Agusta S.p.A. Model AB412 and AB412 EP helicopters. This AD requires inspecting the tail rotor (T/R) drive shaft flanged adapter (adapter) for a crack and removing the adapter from service if there is a crack. This AD is prompted by a report of a crack found in an adapter. These actions are intended to detect a crack in the adapter and prevent failure of the T/R drive shaft, which could result in reduced control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2015/06/09/2015-13343/airworthiness-directives-agusta-spa-helicopters)
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