# Airworthiness Directives; Rolls-Royce Corporation 501-D Series Turboprop Engines
> **Rule** · Final rule. · Published 2006-12-19 · Effective 2007-01-23 · 71 FR 75855
## Document
- **Document number:** E6-21352
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce Corporation 501-D Series Turboprop
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 71 FR 75855
- **Publication date:** 2006-12-19
- **Effective date:** 2007-01-23
- **FAA docket:** Docket No. FAA-2006-26193
## Abstract

The FAA is superseding an existing airworthiness directive (AD) for Rolls-Royce Corporation (RRC) 501-D series turboprop engines. That AD requires removal from service of certain turbine rotor components at reduced life limits. This AD requires the same actions but adds two new life limits. This AD results from RRC reevaluating and revising component life limits for 501-D22 series turboprop engines. We are issuing this AD to prevent uncontained turbine rotor failure resulting in an in-flight engine shutdown and possible damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/12/19/E6-21352/airworthiness-directives-rolls-royce-corporation-501-d-series-turboprop-engines)
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