# Airworthiness Directives; Rolls-Royce plc Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2014-06-27 · Effective 2014-07-14 · 79 FR 36387
## Document
- **Document number:** 2014-14807
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 79 FR 36387
- **Publication date:** 2014-06-27
- **Effective date:** 2014-07-14
- **FAA docket:** Docket No. FAA-2014-0281
## Abstract

We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211 Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, and 560A2-61 turbofan engines. We are issuing this AD to address, through an update to the electronic engine control (EEC) software, multiple risks of uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/06/27/2014-14807/airworthiness-directives-rolls-royce-plc-turbofan-engines)
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