# Airworthiness Directives; Rolls-Royce plc. RB211 535 Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2001-09-26 · Effective 2001-10-11 · 66 FR 49099
## Document
- **Document number:** 01-24023
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc. RB211 535 Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 66 FR 49099
- **Publication date:** 2001-09-26
- **Effective date:** 2001-10-11
- **FAA docket:** Docket No. 2001-NE-22-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Rolls-Royce plc. (RR) models RB211-535C-37, RB211- 535E4-37, RB211-535E4-B-37, and RB211-535E4-B-75 turbofan engines, with radial drive steady bearing, part number (P/N) LK76084. This action requires the replacement of certain radial drive steady bearings, installed in the high speed gearbox drive. This amendment is prompted by five reports of radial drive steady bearing failures. The actions specified in this AD are intended to reduce the risk of engine in- flight shutdown, due to failure at low life of radial drive steady bearings.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/09/26/01-24023/airworthiness-directives-rolls-royce-plc-rb211-535-turbofan-engines)
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