# Airworthiness Directives; Rolls-Royce plc RB211 Series Turbofan Engines
> **Rule** · Final rule. · Published 2004-01-20 · Effective 2004-02-24 · 69 FR 2661
## Document
- **Document number:** 04-759
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce plc RB211 Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 2661
- **Publication date:** 2004-01-20
- **Effective date:** 2004-02-24
- **FAA docket:** Docket No. 2003-NE-12-AD
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce plc (RR) RB211-22B series, RB211-524B, -524C2, -524D4, - 524G2, -524G3, and -524H series, and RB211-535C and -535E series turbofan engines with high pressure compressor (HPC) stage 3 disc assemblies, part numbers (P/Ns) LK46210, LK58278, LK67634, LK76036, UL11706, UL15358, UL22577, UL22578, and UL24738 installed. This AD allows disc assemblies not modified by a certain RR service bulletin to reach their full life only after the disc assemblies are modified with anti-corrosion protection. This AD results from the manufacturer's reassessment of the corrosion risk on HPC stage 3 disc assemblies that have not yet been modified with sufficient application of anti- corrosion protection. We are issuing this AD to prevent corrosion- induced uncontained disc failure, resulting in damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/01/20/04-759/airworthiness-directives-rolls-royce-plc-rb211-series-turbofan-engines)
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