# Airworthiness Directives; Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca, S.A.), Turboshaft Engines
> **Rule** · Final rule; request for comments. · Published 2021-03-05 · Effective 2021-03-22 · 86 FR 12807
## Document
- **Document number:** 2021-04454
- **Category:** airworthiness
- **Manufacturer:** Safran Helicopter
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 12807
- **Publication date:** 2021-03-05
- **Effective date:** 2021-03-22
- **FAA docket:** Docket No. FAA-2021-0132
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Safran Helicopter Engines, S.A. (Safran Helicopter Engines) Arriel 1B, Arriel 1C, Arriel 1C2, Arriel 1D1, Astazou XIV B, and Astazou XIV H model turboshaft engines. This AD was prompted by the detection of positive segregation (freckles) on Stage 2 high-pressure turbine (HPT) disks and Stage 3 turbine wheels. This AD requires removal from service of certain Stage 2 HPT disks for Safran Helicopter Engines Arriel 1B, 1C, 1C2, and 1D1 model turbofan engines and affected Stage 3 turbine wheels for Safran Helicopter Engines Astazou XIV B and XIV H model turbofan engines. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/03/05/2021-04454/airworthiness-directives-safran-helicopter-engines-sa-type-certificate-previously-held-by-turbomeca)
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