# Proposed AD FAA-2010-0821: Rolls-Royce plc Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-08-07
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 3, 2012, 77 FR 26216
- Comments due: July 2, 2012
- Became: [AD 2011-08-07](https://openairdocs.org/ad/2011-08-07)
- Docket: FAA-2010-0821 (https://www.regulations.gov/docket/FAA-2010-0821, where comments are filed)
- Project: 2010-NE-30-AD
- FR document: 2012-10693
- Official PDF: https://openairdocs.org/files/sha256/5e/44/5e443ec8322d286934935ad23b2f11813454d494a9bdfea9aa96756ec1f5b1e4 (from https://www.govinfo.gov/content/pkg/FR-2012-05-03/pdf/2012-10693.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/05/03/2012-10693/airworthiness-directives-rolls-royce-plc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FC60D6C01D56E8AF862579F30049B113.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0821

## Summary

We propose to supersede an existing airworthiness directive (AD) that applies to all Rolls-Royce plc (RR) RB211-Trent 875-17, RB211-Trent 877-17, RB211-Trent 884-17, RB211-Trent 884B-17, RB211- Trent 892-17, RB211-Trent 892B-17, and RB211-Trent 895-17 turbofan engines. The existing AD currently requires initial and repetitive ultrasonic inspections (UIs) of certain low-pressure (LP) compressor blades identified by serial number (S/N). This proposed AD would require the same actions but expands the population of blades. We are proposing this AD to prevent LP compressor blades from failing due to blade root cracks, which could lead to uncontained engine failure and damage to the airplane.

## Notices in this docket

- Jan 14, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-775, comments due Feb 28, 2011 (https://www.federalregister.gov/documents/2011/01/14/2011-775/airworthiness-directives-rolls-royce-plc-rb211-trent-800-series-turbofan-engines)
- May 3, 2012: Notice of proposed rulemaking (NPRM)., FR document 2012-10693, comments due Jul 2, 2012 (https://www.federalregister.gov/documents/2012/05/03/2012-10693/airworthiness-directives-rolls-royce-plc-turbofan-engines)

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