# Proposed AD FAA-2018-1034: Rolls-Royce plc Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-08-03
- Products: Rolls-Royce
- Product type: Engine
- Published: May 24, 2019, 84 FR 24049
- Comments due: July 4, 2019
- Became: [AD 2020-08-03](https://openairdocs.org/ad/2020-08-03)
- Docket: FAA-2018-1034 (https://www.regulations.gov/docket/FAA-2018-1034, where comments are filed)
- FR document: C1-2019-10233
- Official PDF: https://openairdocs.org/files/sha256/b6/a3/b6a310c0ae94fe2f33fb35ce21a336e9f026df1017258d6dd87672b185c5cbc1 (from https://www.govinfo.gov/content/pkg/FR-2019-05-24/pdf/C1-2019-10233.pdf)
- Federal Register: https://www.federalregister.gov/documents/2019/05/24/C1-2019-10233/airworthiness-directives-rolls-royce-plc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/27CE84ED3AD5340586258400004D6BEE.0001
- Page: https://openairdocs.org/proposed/FAA-2018-1034

## Summary

We propose to supersede airworthiness directive (AD) 2008-22- 24 which applies to certain Rolls-Royce plc (RR) RB211-535E4-37, RB211- 535E4-B-37, and RB211-535E4-B-75 model turbofan engines. AD 2008-22-24 requires initial and repetitive ultrasonic inspections of installed low-pressure compressor (LPC) fan blade roots on-wing and during overhaul, and relubrication according to accumulated life cycles. Since we issued AD 2008-22-24, RR determined the need to expand the inspections to engines operating under additional flight profiles and to extend the inspection intervals for certain affected engines. This proposed AD would require initial and repetitive inspections to detect cracks on the installed LPC fan blade roots on-wing or at engine overhaul. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 20, 2019: Notice of proposed rulemaking (NPRM). (first notice), FR document 2019-10233, comments due Jul 1, 2019 (https://www.federalregister.gov/documents/2019/05/20/2019-10233/airworthiness-directives-rolls-royce-plc-turbofan-engines)
- May 24, 2019: Proposed rule, FR document C1-2019-10233, comments due Jul 4, 2019 (https://www.federalregister.gov/documents/2019/05/24/C1-2019-10233/airworthiness-directives-rolls-royce-plc-turbofan-engines)

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