# Proposed AD FAA-2013-0052: Rolls-Royce plc Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-19-18
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 5, 2013, 78 FR 20507
- Comments due: June 4, 2013
- Became: [AD 2013-19-18](https://openairdocs.org/ad/2013-19-18)
- Docket: FAA-2013-0052 (https://www.regulations.gov/docket/FAA-2013-0052, where comments are filed)
- Project: 2013-NE-02-AD
- FR document: 2013-07931
- Official PDF: https://openairdocs.org/files/sha256/96/40/96405595102b1fc989d7d5040fa433fd591b8d3f2772d174a2e2355a45841708 (from https://www.govinfo.gov/content/pkg/FR-2013-04-05/pdf/2013-07931.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/04/05/2013-07931/airworthiness-directives-rolls-royce-plc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/048F91050FC1BF7086257B44004691E6.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0052

## Summary

We propose to adopt a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, RB211-535E4-C- 37, and RB211-535E4-B-75 turbofan engines. This proposed AD was prompted by RR updating the low-cycle-fatigue life analysis for the low pressure turbine (LPT) stage 2 discs. This proposed AD would require removal of affected parts using a drawdown plan. We are proposing this AD to prevent LPT stage 2 disc failure, which could result in uncontained engine damage and damage to the airplane.

## Notices in this docket

- Apr 5, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-07931, comments due Jun 4, 2013 (https://www.federalregister.gov/documents/2013/04/05/2013-07931/airworthiness-directives-rolls-royce-plc-turbofan-engines)

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