# Airworthiness Directives; Rolls-Royce Corporation Turboshaft Engines
> **Rule** · Final rule. · Published 2022-05-24 · Effective 2022-06-28 · 87 FR 31384
## Document
- **Document number:** 2022-11084
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce Corporation Turboshaft
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 87 FR 31384
- **Publication date:** 2022-05-24
- **Effective date:** 2022-06-28
- **FAA docket:** Docket No. FAA-2021-1071
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2017-18- 14, which applied to certain Rolls-Royce Corporation (RRC) 250 model turboshaft engines. AD 2017-18-14 required repetitive visual inspections and fluorescent penetrant inspections (FPIs) of the 3rd- stage turbine wheel and removal from service of the 4th-stage turbine wheel. This AD was prompted by in-service turbine blade failures that resulted in the loss of power and engine in-flight shutdowns. This AD requires replacement of the 3rd-stage and 4th-stage turbine wheels. This AD also revises the applicability to include an additional turboshaft engine model. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/05/24/2022-11084/airworthiness-directives-rolls-royce-corporation-turboshaft-engines)
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