# Airworthiness Directives; Rolls-Royce plc Turbojet Engines
> **Rule** · Final rule. · Published 2013-06-10 · Effective 2013-07-15 · 78 FR 34550
## Document
- **Document number:** 2013-13012
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Turbojet
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 34550
- **Publication date:** 2013-06-10
- **Effective date:** 2013-07-15
- **FAA docket:** Docket No. FAA-2012-1331
## Abstract

We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) Viper Mk. 601-22 turbojet engines. This AD requires reducing the life of certain critical parts. This AD was prompted by a review carried out by RR of the lives of these parts. We are issuing this AD to prevent failure of life-limited parts, damage to the engine, and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/06/10/2013-13012/airworthiness-directives-rolls-royce-plc-turbojet-engines)
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