# Airworthiness Directives; Turbomeca Arriel 1 Series Turboshaft Engines
> **Rule** · Final rule; request for comments. · Published 2000-10-02 · Effective 2000-10-17 · 65 FR 58640
## Document
- **Document number:** 00-24900
- **Category:** airworthiness
- **Manufacturer:** Turbomeca Arriel 1 Series Turboshaft
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 65 FR 58640
- **Publication date:** 2000-10-02
- **Effective date:** 2000-10-17
- **FAA docket:** Docket No. 2000-NE-11-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Turbomeca Arriel 1 series turboshaft engines. This action requires the installation of a chip detector with electronic warning on the rear bearing oil return system. This amendment is prompted by reports of gas generator rear bearing failures. The actions specified in this AD are intended to prevent gas generator rear bearing failure, which could lead to an uncommanded engine shutdown.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/10/02/00-24900/airworthiness-directives-turbomeca-arriel-1-series-turboshaft-engines)
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