# Airworthiness Directives; Agusta S.p.A. (Agusta) Helicopters
> **Rule** · Final rule; request for comments. · Published 2015-06-09 · Effective 2015-06-24 · 80 FR 32445
## Document
- **Document number:** 2015-13845
- **Category:** airworthiness
- **Manufacturer:** Agusta S.p.A. (Agusta)
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 80 FR 32445
- **Publication date:** 2015-06-09
- **Effective date:** 2015-06-24
- **FAA docket:** Docket No. FAA-2015-1937
## Abstract

We are superseding airworthiness directive (AD) 2014-02-08 for Agusta Model A109C, A109S, A109K2, A109E, and AW109SP helicopters. AD 2014-02-08 required inspecting the lock wires securing the tail rotor (T/R) duplex bearing locking nut (locking nut) to determine whether any lock wires are missing or damaged. This AD retains some of the requirements of AD 2014-02-08 but removes the terminating action, expands the applicability, and adds a daily pilot check. This AD was prompted by reports of loosening T/R locking nuts. These actions are intended to prevent failure of the T/R and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2015/06/09/2015-13845/airworthiness-directives-agusta-spa-agusta-helicopters)
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