# Airworthiness Directives; Rolls-Royce plc, RB211 Trent 768-60, 772-60, and 772B-60 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2007-11-29 · Effective 2007-12-14 · 72 FR 67568
## Document
- **Document number:** E7-23020
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 72 FR 67568
- **Publication date:** 2007-11-29
- **Effective date:** 2007-12-14
- **FAA docket:** Docket No. FAA-2006-26052
## Abstract

The FAA is superseding an existing airworthiness directive (AD) for Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. That AD currently requires initial and repetitive on- wing or in-shop inspections of the high pressure/intermediate pressure (HP/IP) turbine bearing oil feed tube heat shield. This AD requires the same actions but introduces a terminating action to the repetitive inspections. This AD results from RR introducing a revised HP/IP turbine bearing support structure as terminating action to the repetitive inspections of the HP/IP turbine bearing oil feed tube heat shield. We are issuing this AD to prevent an uncontained failure of the HP turbine disc and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/11/29/E7-23020/airworthiness-directives-rolls-royce-plc-rb211-trent-768-60-772-60-and-772b-60-turbofan-engines)
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