# Proposed AD FAA-2014-0363: Rolls-Royce plc Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-17-19
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 1, 2016, 81 FR 86630
- Comments due: January 30, 2017
- Became: [AD 2015-17-19](https://openairdocs.org/ad/2015-17-19)
- Docket: FAA-2014-0363 (https://www.regulations.gov/docket/FAA-2014-0363, where comments are filed)
- Project: 2014-NE-08-AD
- FR document: 2016-27923
- Official PDF: https://openairdocs.org/files/sha256/da/e5/dae5f2fb5a067156bc02c2a1d5eab6cb3ebab1752345a44ad500c7b68a8264b0 (from https://www.govinfo.gov/content/pkg/FR-2016-12-01/pdf/2016-27923.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/12/01/2016-27923/airworthiness-directives-rolls-royce-plc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2887D446114142678625807C00537EA3.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0363

## Summary

We propose to supersede airworthiness directive (AD) 2015-17- 19 that applies to all Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. AD 2015-17-19 requires inspection of the fan case low-pressure (LP) fuel tubes and associated clips and the fuel oil heat exchanger (FOHE) mounts and associated hardware. Since we issued AD 2015-17-19, fractures on the LP fuel return tube at mid-span locations were found with resulting fuel leaks. This proposed AD would require a modification, which terminates the repetitive inspections. We are proposing this AD to prevent failure of the fan case LP fuel tubes, which could lead to an in-flight shutdown, loss of thrust control, and damage to the airplane.

## Notices in this docket

- Jul 3, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-15620, comments due Sep 2, 2014 (https://www.federalregister.gov/documents/2014/07/03/2014-15620/airworthiness-directives-rolls-royce-plc-turbofan-engines)
- Apr 21, 2015: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document 2015-09001, comments due Jun 22, 2015 (https://www.federalregister.gov/documents/2015/04/21/2015-09001/airworthiness-directives-rolls-royce-plc-turbofan-engines)
- Dec 1, 2016: Notice of proposed rulemaking (NPRM)., FR document 2016-27923, comments due Jan 30, 2017 (https://www.federalregister.gov/documents/2016/12/01/2016-27923/airworthiness-directives-rolls-royce-plc-turbofan-engines)

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