# Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
> **Rule** · Final rule. · Published 2017-05-23 · Effective 2017-06-27 · 82 FR 23494
## Document
- **Document number:** 2017-10258
- **Category:** airworthiness
- **Manufacturer:** ATR-GIE Avions de Transport Régional
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 23494
- **Publication date:** 2017-05-23
- **Effective date:** 2017-06-27
- **FAA docket:** Docket No. FAA-2016-9430
## Abstract

We are adopting a new airworthiness directive (AD) for certain ATR-GIE Avions de Transport R[eacute]gional Model ATR42-500 airplanes and Model ATR72-102, -202, -212, and -212A airplanes. This AD was prompted by reports of failure of emergency power supply units (EPSUs) in production and in service. This AD requires an inspection to determine the part number and serial number of each EPSU, and replacement if necessary. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/05/23/2017-10258/airworthiness-directives-atr-gie-avions-de-transport-rgional-airplanes)
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