# Airworthiness Directives; Agusta S.p.A. (Agusta) Model AB139 and AW139 Helicopters
> **Rule** · Final rule; request for comments. · Published 2010-01-22 · Effective 2010-02-08 · 75 FR 3615
## Document
- **Document number:** 2010-1159
- **Category:** airworthiness
- **Manufacturer:** Agusta S.p.A. (Agusta) Model AB139 and AW139
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 75 FR 3615
- **Publication date:** 2010-01-22
- **Effective date:** 2010-02-08
- **FAA docket:** Docket No. FAA-2009-1125
## Abstract

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2009-19-51, which was sent previously to all known U.S. owners and operators of the Agusta Model AB139 and AW139 helicopters by individual letters. This AD requires inspecting the tail panels for debonding and, if the debonding area exceeds a certain limit, repairing the tailboom. This AD results from a mandatory continuing airworthiness information (MCAI) AD issued by the European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community. The MCAI AD states that while taxiing, the tailboom of a Model AW139 helicopter bent and collapsed. Also, EASA had received previous reports of evidence of debonding on some tailboom panels of the specified Agusta model helicopters. This condition, if not corrected, could result in failure of a tailboom and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/01/22/2010-1159/airworthiness-directives-agusta-spa-agusta-model-ab139-and-aw139-helicopters)
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