# Airworthiness Directives; Rolls-Royce plc Turbofan Engines
> **Rule** · Final rule. · Published 2017-02-15 · Effective 2017-03-22 · 82 FR 10701
## Document
- **Document number:** 2017-02921
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 10701
- **Publication date:** 2017-02-15
- **Effective date:** 2017-03-22
- **FAA docket:** Docket No. FAA-2012-1327
## Abstract

We are superseding airworthiness directive (AD) 2014-16-10 for all Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. AD 2014-16-10 required initial and repetitive ultrasonic inspections (UIs) of the affected low-pressure (LP) compressor blades. This AD requires the UIs in AD 2014-16-10 while reducing the inspection threshold. This AD was prompted by revised service information to reduce the inspection threshold for UI of the LP compressor blades. We are issuing this AD to correct the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/02/15/2017-02921/airworthiness-directives-rolls-royce-plc-turbofan-engines)
---
*AI Analytics · CC0 1.0*