# Proposed AD FAA-2012-1031: Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-05-19
- Products: Rolls-Royce Deutschland
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 13, 2012, 77 FR 67582
- Comments due: January 14, 2013
- Became: [AD 2013-05-19](https://openairdocs.org/ad/2013-05-19)
- Docket: FAA-2012-1031 (https://www.regulations.gov/docket/FAA-2012-1031, where comments are filed)
- Project: 2012-NE-31-AD
- FR document: 2012-27454
- Official PDF: https://openairdocs.org/files/sha256/cd/64/cd64e7dee0a4ae192f06c19a7d703a7244e6f80de35df01bafac6f5eea85a73b (from https://www.govinfo.gov/content/pkg/FR-2012-11-13/pdf/2012-27454.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/11/13/2012-27454/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B542393C31DED94186257AB500603F4E.0001
- Page: https://openairdocs.org/proposed/FAA-2012-1031

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 611-8 turbofan engines. This proposed AD was prompted by a recent quality review determination that bolts with reduced material properties may have been installed in some engines. This proposed AD would require inspection and replacement if necessary, of affected bolts. We are proposing this AD to prevent uncontained turbine disc fracture and damage to the airplane.

## Notices in this docket

- Nov 13, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-27454, comments due Jan 14, 2013 (https://www.federalregister.gov/documents/2012/11/13/2012-27454/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-turbofan-engines)

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