# Airworthiness Directives; Rolls-Royce plc Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2017-11-07 · Effective 2017-11-22 · 82 FR 51550
## Document
- **Document number:** 2017-24156
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 82 FR 51550
- **Publication date:** 2017-11-07
- **Effective date:** 2017-11-22
- **FAA docket:** Docket No. FAA-2017-0816
## Abstract

We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-Trent 970-84 and RB211-Trent 972-84 turbofan engines. This AD requires an inspection of the drains mast. This AD was prompted by cracks found in the transition duct area of the drains mast. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/11/07/2017-24156/airworthiness-directives-rolls-royce-plc-turbofan-engines)
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