# Airworthiness Directives; Safran Helicopter Engines, S.A., Turboshaft Engines
> **Rule** · Final rule; request for comments. · Published 2019-03-01 · Effective 2019-03-18 · 84 FR 6962
## Document
- **Document number:** 2019-03641
- **Category:** airworthiness
- **Manufacturer:** Safran Helicopter
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 84 FR 6962
- **Publication date:** 2019-03-01
- **Effective date:** 2019-03-18
- **FAA docket:** Docket No. FAA-2018-0949
## Abstract

We are adopting a new airworthiness directive (AD) for all Safran Helicopter Engines, S.A. (Safran Helicopter Engines), ASTAZOU XIV B and H model engines with certain 3rd-stage turbine wheels installed. This AD requires initial and repetitive inspections of the 3rd-stage turbine wheels. This AD was prompted by a report that six 3rd-stage turbine wheels were returned to service after a repair that could result in exceedance of the allowable vibration threshold during operation. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/03/01/2019-03641/airworthiness-directives-safran-helicopter-engines-sa-turboshaft-engines)
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