# Airworthiness Directives; Rolls-Royce plc Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2017-09-26 · Effective 2017-10-11 · 82 FR 44715
## Document
- **Document number:** 2017-20420
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 82 FR 44715
- **Publication date:** 2017-09-26
- **Effective date:** 2017-10-11
- **FAA docket:** Docket No. FAA-2017-0767
## Abstract

We are adopting a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) Trent XWB-75, Trent XWB-79, Trent XWB-79B, and Trent XWB-84, turbofan engines. This AD requires replacement of the low-pressure compressor (LPC) case support inboard pins. This AD was prompted by LPC case support inboard pins that may have reduced integrity due to incorrect heat treatment. We are issuing this AD to correct the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/09/26/2017-20420/airworthiness-directives-rolls-royce-plc-turbofan-engines)
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