# Proposed AD FAA-2010-0755: Rolls-Royce plc Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-04-01
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 18, 2017, 82 FR 5454
- Comments due: March 6, 2017
- Became: [AD 2012-04-01](https://openairdocs.org/ad/2012-04-01)
- Docket: FAA-2010-0755 (https://www.regulations.gov/docket/FAA-2010-0755, where comments are filed)
- Project: 2010-NE-12-AD
- FR document: 2017-00890
- Official PDF: https://openairdocs.org/files/sha256/5f/52/5f52c5cebad5fc1a376845fa3e0d206f76f344a1d48e83f81acdffa4a6de8fd2 (from https://www.govinfo.gov/content/pkg/FR-2017-01-18/pdf/2017-00890.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/01/18/2017-00890/airworthiness-directives-rolls-royce-plc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/01688A19153E93BE862580AC005EA25B.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0755

## Summary

We propose to supersede airworthiness directive (AD) 2012-04- 01 that applies to all Rolls-Royce plc (RR) RB211-Trent 800 model turbofan engines. AD 2012-04-01 requires removal from service of certain critical engine rotating parts based on reduced life limits. Since we issued AD 2012-04-01, RR has further revised the life limits of certain critical engine rotating parts. This proposed AD would make additional revisions to the life limits of certain critical engine rotating parts. We are proposing this AD to correct the unsafe condition on these products.

## Notices in this docket

- Aug 3, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-19027, comments due Sep 17, 2010 (https://www.federalregister.gov/documents/2010/08/03/2010-19027/airworthiness-directives-rolls-royce-plc-rr-rb211-trent-800-series-turbofan-engines)
- Nov 7, 2011: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document 2011-28678, comments due Jan 6, 2012 (https://www.federalregister.gov/documents/2011/11/07/2011-28678/airworthiness-directives-rolls-royce-plc-rr-rb211-trent-800-series-turbofan-engines)
- Jan 18, 2017: Notice of proposed rulemaking (NPRM)., FR document 2017-00890, comments due Mar 6, 2017 (https://www.federalregister.gov/documents/2017/01/18/2017-00890/airworthiness-directives-rolls-royce-plc-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.