# Airworthiness Directives; Rolls-Royce Corporation Turboshaft Engines
> **Rule** · Final rule. · Published 2018-07-12 · Effective 2018-08-16 · 83 FR 32203
## Document
- **Document number:** 2018-14801
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce Corporation Turboshaft
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 32203
- **Publication date:** 2018-07-12
- **Effective date:** 2018-08-16
- **FAA docket:** Docket No. FAA-2017-1118
## Abstract

We are adopting a new airworthiness directive (AD) for certain Rolls-Royce Corporation (RRC) model 250-C turboshaft engines. This AD was prompted by several reports of engine power loss, one of which resulted in a fatal helicopter accident. This AD requires removal of the power turbine governor (PTG) bearing assembly, part number (P/N) 2544198, and its replacement with a bearing assembly eligible for installation. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/07/12/2018-14801/airworthiness-directives-rolls-royce-corporation-turboshaft-engines)
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