# Proposed AD FAA-2021-0690: Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-25-04
- Products: Rolls-Royce Deutschland
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 25, 2021, 86 FR 47417
- Comments due: October 12, 2021
- Became: [AD 2021-25-04](https://openairdocs.org/ad/2021-25-04)
- Docket: FAA-2021-0690 (https://www.regulations.gov/docket/FAA-2021-0690, where comments are filed)
- Project: MCAI-2020-01495-E
- FR document: 2021-17980
- Official PDF: https://openairdocs.org/files/sha256/80/19/80192e59bd67feb2c4ff10b180c6061b875b5a8410c454415d22e401fc9d01ce (from https://www.govinfo.gov/content/pkg/FR-2021-08-25/pdf/2021-17980.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/08/25/2021-17980/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/52FD952FA326006A8625873C00505388.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0690

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd. & Co KG (RRD) Trent 1000 model turbofan engines. This proposed AD was prompted by the manufacturer revising the engine Time Limits Manual (TLM) life limits of certain critical rotating parts and direct accumulation counting data files. This proposed AD would require the operator to revise the airworthiness limitation section (ALS) of their existing approved aircraft maintenance program (AMP) by incorporating the revised tasks of the applicable TLM for each affected model turbofan engine, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 25, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-17980, comments due Oct 12, 2021 (https://www.federalregister.gov/documents/2021/08/25/2021-17980/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-type-certificate-previously-held-by)

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