# Proposed AD FAA-2023-2233: Rolls-Royce Deutschland Ltd & Co KG Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-05-12
- Products: Rolls-Royce Deutschland
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 6, 2023, 88 FR 84759
- Comments due: January 22, 2024
- Became: [AD 2024-05-12](https://openairdocs.org/ad/2024-05-12)
- Docket: FAA-2023-2233 (https://www.regulations.gov/docket/FAA-2023-2233, where comments are filed)
- Project: MCAI-2023-00755-E
- FR document: 2023-26649
- Official PDF: https://openairdocs.org/files/sha256/02/de/02dec30e9150f874a713e6b76eaf5ce520fae8a82002fe05f8b42a5dcb1ac533 (from https://www.govinfo.gov/content/pkg/FR-2023-12-06/pdf/2023-26649.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/12/06/2023-26649/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-26649-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-2233

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent 1000-AE3, Trent 1000-CE3, Trent 1000-D3, Trent 1000-G3, Trent 1000-H3, Trent 1000-J3, Trent 1000-K3, Trent 1000-L3, Trent 1000-M3, Trent 1000-N3, Trent 1000-P3, Trent 1000-Q3, and Trent 1000-R3 engines. This proposed AD was prompted by reports of wear in the combining spill-valve (CSV) assembly of certain hydro-mechanical units (HMUs). This proposed AD would require removing certain HMUs from service and replacing with a serviceable part or modifying the HMU by replacing the CSV assembly, which is an optional terminating action; and would prohibit installing certain HMUs unless the HMU is a serviceable part, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 6, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-26649, comments due Jan 22, 2024 (https://www.federalregister.gov/documents/2023/12/06/2023-26649/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-engines)

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