# Airworthiness Directives; Agusta S.p.A. Helicopters
> **Rule** · Final rule; request for comments. · Published 2014-03-10 · Effective 2014-03-25 · 79 FR 13199
## Document
- **Document number:** 2014-04274
- **Category:** airworthiness
- **Manufacturer:** Agusta S.p.A.
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 79 FR 13199
- **Publication date:** 2014-03-10
- **Effective date:** 2014-03-25
- **FAA docket:** Docket No. FAA-2014-0109
## Abstract

We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB412 and AB412 EP helicopters. This AD requires inspecting the tail rotor (T/R) blade for a crack, corrosion, nick, scratch, dent, or other damage and replacing or repairing the blade, depending on the damage. This AD is prompted by reports of T/R blade failures caused by fatigue cracking that originated from surface damage. These actions are intended to prevent failure of the T/R blade and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/03/10/2014-04274/airworthiness-directives-agusta-spa-helicopters)
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