# Airworthiness Directives; Rolls-Royce plc Trent 768-60 and Trent 772-60 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2003-10-30 · Effective 2003-11-14 · 68 FR 61739
## Document
- **Document number:** 03-27153
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc Trent 768-60 and Trent 772-60 Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 68 FR 61739
- **Publication date:** 2003-10-30
- **Effective date:** 2003-11-14
- **FAA docket:** Docket No. 2003-NE-37-AD
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) RB211 Trent 768-60 and Trent 772-60 turbofan engines. This AD requires reworking the low pressure (LP) turbine nozzle vane case, the LP turbine bearing support exhaust case, and the support arm bracket assemblies. This AD is prompted by a report of an LP stage 4 blade failure at the blade shank, resulting in severe radial distortion of the rear flange of the LP turbine case and failure of a number of attaching bolts, resulting in enough flange separation to allow the release of high energy debris. We are issuing this AD to prevent possible uncontained LP turbine case failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/10/30/03-27153/airworthiness-directives-rolls-royce-plc-trent-768-60-and-trent-772-60-turbofan-engines)
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