# Proposed AD 2000-NE-13-AD: Rolls-Royce RB211 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-12-15
- Products: Rolls-Royce
- Product type: Engine
- Action: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
- Published: February 20, 2003, 68 FR 8157
- Comments due: April 21, 2003
- Became: [AD 2003-12-15](https://openairdocs.org/ad/2003-12-15)
- Docket: 2000-NE-13-AD
- FR document: 03-4057
- Official PDF: https://openairdocs.org/files/sha256/56/f0/56f0d249e644614c4f01f9f7aa8e2c93e6d74fb370e4d575c0e51e4924d04842 (from https://www.govinfo.gov/content/pkg/FR-2003-02-20/pdf/03-4057.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/02/20/03-4057/airworthiness-directives-rolls-royce-rb211-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/29B9D61329164C1E86256CD3005B01AE.0001
- Page: https://openairdocs.org/proposed/2000-NE-13-AD

## Summary

This notice revises an earlier proposed airworthiness directive (AD), applicable to Rolls-Royce (RR) plc RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4-B-75 series turbofan engines. That proposal would have required initial and repetitive ultrasonic inspections of low pressure compressor (LPC) fan blade roots for cracks, and relubrication of LPC fan blades before reinstallation. That proposal was prompted by the discovery of cracks on LPC fan blade roots during an engine overhaul. This action revises the proposed rule by introducing an alternative technique to ultrasonically inspect installed fan blades on-wing using a surface wave ultrasonic probe. This action also adds the application of Metco 58 blade root coating as an optional terminating action. The actions specified by this proposed AD are intended to detect cracks in LPC fan blade roots, which if not detected, could lead to uncontained multiple fan blade failure, and damage to the airplane.

## Notices in this docket

- Aug 9, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-19937, comments due Oct 9, 2001 (https://www.federalregister.gov/documents/2001/08/09/01-19937/airworthiness-directives-rolls-royce-rb211-series-turbofan-engines)
- Feb 20, 2003: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document 03-4057, comments due Apr 21, 2003 (https://www.federalregister.gov/documents/2003/02/20/03-4057/airworthiness-directives-rolls-royce-rb211-series-turbofan-engines)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.