# Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG
> **Rule** · Final rule. · Published 2024-05-06 · Effective 2024-06-10 · 89 FR 37109
## Document
- **Document number:** 2024-09555
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 89 FR 37109
- **Publication date:** 2024-05-06
- **Effective date:** 2024-06-10
- **FAA docket:** Docket No. FAA-2024-0036
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent 1000-A, Trent 1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-C, Trent 1000-C2, Trent 1000-CE, Trent 1000-CE2, Trent 1000-D, Trent 1000-D2, Trent 1000- E, Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 1000-H, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 engines. This AD was prompted by reports of wear in the combining spill valve (CSV) assembly of certain hydro-mechanical units (HMUs). This AD requires removing certain HMUs from service and replacing with a serviceable part. This AD also prohibits the installation of certain HMUs unless the HMU is a serviceable part or the CSV assembly has been replaced, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/05/06/2024-09555/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg)
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