# Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co. KG Engines
> **Rule** · Final rule; request for comments. · Published 2026-09-18 · Effective 2026-09-21 · 91 FR 59048
## Document
- **Document number:** 2026-19171
- **Category:** airworthiness
- **Manufacturer:** Rolls-Royce Deutschland Ltd. & Co. KG
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 91 FR 59048
- **Publication date:** 2026-09-18
- **Effective date:** 2026-09-21
- **FAA docket:** Docket No. FAA-2026-8815
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd. & Co. KG (RRD) Model RB211-Trent 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, and 895-17 engines. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these engines. This AD was prompted by reports of non- conformances leading to low oil pressure events on low life oil pumps. This AD requires de-pairing of engines on airplanes with two affected engines installed to ensure no more than one affected oil pump is installed on twin-engine airplanes. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/09/18/2026-19171/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-engines)
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