# Airworthiness Directives; Turbomeca S.A. Arrius 2 B1, 2 B1A, 2 B1A 1, and 2 K1 Turboshaft Engines
> **Rule** · Final rule. · Published 2003-09-17 · Effective 2003-10-22 · 68 FR 54327
## Document
- **Document number:** 03-23673
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 68 FR 54327
- **Publication date:** 2003-09-17
- **Effective date:** 2003-10-22
- **FAA docket:** Docket No. 2003-NE-05-AD
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Turbomeca S.A. Arrius 2 B1, 2 B1A, 2 B1A 1, and 2 K1 turboshaft engines. This AD requires replacement of the gas generator high pressure (HP) turbine disk before further flight after the engine has accumulated 5 minutes of operating time at the 2\1/2\ minute one engine inoperative (OEI) power rating. This amendment is prompted by a failure of an HP turbine blade during accelerated aging simulation tests performed by the manufacturer on an Arrius 2 B1A engine. We are issuing this AD to prevent engine failure of the only operating engine while experiencing an OEI condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/09/17/03-23673/airworthiness-directives-turbomeca-sa-arrius-2-b1-2-b1a-2-b1a-1-and-2-k1-turboshaft-engines)
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