# Proposed AD FAA-2017-0140: Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-19-18
- Products: Rolls-Royce Deutschland
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 26, 2017, 82 FR 24257
- Comments due: July 10, 2017
- Became: [AD 2017-19-18](https://openairdocs.org/ad/2017-19-18)
- Docket: FAA-2017-0140 (https://www.regulations.gov/docket/FAA-2017-0140, where comments are filed)
- Project: 2017-NE-05-AD
- FR document: 2017-10439
- Official PDF: https://openairdocs.org/files/sha256/5a/33/5a3318ee124b69b7931c612599f47210cbb0a6a6d41113cc50acf2672aa0e182 (from https://www.govinfo.gov/content/pkg/FR-2017-05-26/pdf/2017-10439.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/05/26/2017-10439/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BAF297E20EB4EAB18625812C004CD4B9.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0140

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) model Tay 620-15 turbofan engines. This proposed AD was prompted by RRD recalculating the life limit for certain high-pressure compressor (HPC) stage 12 rotor disks. This proposed AD would require reducing the maximum approved life limit. We are proposing this AD to correct the unsafe condition on these products.

## Notices in this docket

- May 26, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-10439, comments due Jul 10, 2017 (https://www.federalregister.gov/documents/2017/05/26/2017-10439/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-turbofan-engines)

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