# Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
> **Rule** · Final rule; request for comments. · Published 2024-03-14 · Effective 2024-03-29 · 89 FR 18534
## Document
- **Document number:** 2024-05499
- **Category:** airworthiness
- **Manufacturer:** ATR-GIE Avions de Transport Régional
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 89 FR 18534
- **Publication date:** 2024-03-14
- **Effective date:** 2024-03-29
- **FAA docket:** Docket No. FAA-2024-0458
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all ATR-GIE Avions de Transport R[eacute]gional Model ATR42 and ATR72 airplanes. This AD was prompted by a report of incorrect marking and assembly of the two-way valves for the left- and right-hand engine fire extinguishing systems. This AD requires accomplishing a functional check of an affected part; replacing an affected part if necessary; reporting the functional check results; and prohibiting the installation of affected parts; as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/03/14/2024-05499/airworthiness-directives-atr-gie-avions-de-transport-rgional-airplanes)
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