# Proposed AD FAA-2017-1108: Rolls-Royce plc Turbojet Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-17-08
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 15, 2017, 82 FR 59560
- Comments due: January 29, 2018
- Became: [AD 2018-17-08](https://openairdocs.org/ad/2018-17-08)
- Docket: FAA-2017-1108 (https://www.regulations.gov/docket/FAA-2017-1108, where comments are filed)
- FR document: 2017-26968
- Official PDF: https://openairdocs.org/files/sha256/ff/47/ff47d95afb23193b3e109fce60f1d53188eccaa480ba7ea6991c538369a6bdad (from https://www.govinfo.gov/content/pkg/FR-2017-12-15/pdf/2017-26968.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/12/15/2017-26968/airworthiness-directives-rolls-royce-plc-turbojet-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/91B9DBB05841F8A0862581F70057399E.0001
- Page: https://openairdocs.org/proposed/FAA-2017-1108

## Summary

We propose to supersede airworthiness directive (AD) 2016-03- 03 that applies to all Rolls-Royce plc (RR) Viper Mk. 521, Viper Mk. 522, and Viper Mk. 601-22 turbojet engines. AD 2016-03-03 requires reducing the life of certain critical parts. Since we issued AD 2016- 03-03, RR determined that additional parts for these RR Viper engine models are affected. This proposed AD would add additional engine parts to the applicability. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 15, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-26968, comments due Jan 29, 2018 (https://www.federalregister.gov/documents/2017/12/15/2017-26968/airworthiness-directives-rolls-royce-plc-turbojet-engines)

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