# Airworthiness Directives; Rolls-Royce plc. RB211 Trent 768-60, Trent 772-60, and Trent 772B-60 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2000-07-03 · Effective 2000-08-02 · 65 FR 40983
## Document
- **Document number:** 00-16231
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 65 FR 40983
- **Publication date:** 2000-07-03
- **Effective date:** 2000-08-02
- **FAA docket:** Docket No. 2000-NE-05-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce plc. (RR) RB211 Trent 768-60, Trent 772- 60, and Trent 772B-60 turbofan engines. This action requires initial and repetitive ultrasonic inspections for cracks in fan blade dovetail roots, and if necessary, replacement with serviceable parts. This amendment is prompted by reports of fan blade failures due to dovetail root cracks. The actions specified in this AD are intended to prevent possible multiple fan blade failures, which could result in an uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/07/03/00-16231/airworthiness-directives-rolls-royce-plc-rb211-trent-768-60-trent-772-60-and-trent-772b-60-turbofan)
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