# Proposed AD FAA-2011-0836: Rolls-Royce plc (RR) Trent 800 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-26-08
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 22, 2011, 76 FR 52288
- Comments due: October 6, 2011
- Became: [AD 2011-26-08](https://openairdocs.org/ad/2011-26-08)
- Docket: FAA-2011-0836 (https://www.regulations.gov/docket/FAA-2011-0836, where comments are filed)
- Project: 2010-NE-38-AD
- FR document: 2011-21311
- Official PDF: https://openairdocs.org/files/sha256/ac/e0/ace0e8f8f78e0e078acf1c067dafc8835c17c60561e323ccf5ad7c3f429329f9 (from https://www.govinfo.gov/content/pkg/FR-2011-08-22/pdf/2011-21311.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/08/22/2011-21311/airworthiness-directives-rolls-royce-plc-rr-trent-800-series-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BF8FBFDFE9D0ABFE862578F4004F0EEB.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0836

## 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:

Fuel leaks from the engine have occurred in-service due to damage to sections of the fan case Low Pressure (LP) fuel tubes which run between the Low Pressure and the High Pressure (HP) fuel pumps. This damage has been caused by frettage between the securing clips and the tube outer surface, which has caused localised thinning of the tube wall thickness. The thinning of the tube wall causes the tube to fracture and fuel loss to occur.

We are proposing this AD to prevent engine fuel leaks, which could result in risk to the airplane.

## Notices in this docket

- Aug 22, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-21311, comments due Oct 6, 2011 (https://www.federalregister.gov/documents/2011/08/22/2011-21311/airworthiness-directives-rolls-royce-plc-rr-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.