# Proposed AD FAA-2011-0959: Rolls-Royce plc (RR) RB211 Trent 800 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-04-14
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 25, 2011, 76 FR 72650
- Comments due: January 24, 2012
- Became: [AD 2012-04-14](https://openairdocs.org/ad/2012-04-14)
- Docket: FAA-2011-0959 (https://www.regulations.gov/docket/FAA-2011-0959, where comments are filed)
- Project: 2011-NE-25-AD
- FR document: 2011-30060
- Official PDF: https://openairdocs.org/files/sha256/ff/54/ff544eaf52c5821738d390a16016ea2670802ab07ef57685c03409066f515bac (from https://www.govinfo.gov/content/pkg/FR-2011-11-25/pdf/2011-30060.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/11/25/2011-30060/airworthiness-directives-rolls-royce-plc-rr-rb211-trent-800-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/675E845FC75B982586257953004BE800.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0959

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Routine inspections have revealed cracking on the head sections of two Trent 800 front combustion liners.

We are proposing this AD to prevent uncontained engine failure and damage to the airplane.

## Notices in this docket

- Nov 25, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-30060, comments due Jan 24, 2012 (https://www.federalregister.gov/documents/2011/11/25/2011-30060/airworthiness-directives-rolls-royce-plc-rr-rb211-trent-800-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.