# Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines

**Action Urgency Score:** 20/100

| Field | Value |
|---|---|
| Agency | Transportation Department; Federal Aviation Administration |
| Type | Proposed rule |
| Action | Notice of proposed rulemaking (NPRM). |
| Published | 2026-08-17 |
| Comments close | 2026-10-01 |
| Significant | No |
| CFR parts | 14 CFR 39 |
| Summary | The FAA proposes to adopt a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent XWB-75, XWB-79, XWB-79B, and XWB-84 engines. This proposed AD was prompted by reports of differential oil pressure measurements that were lower than expected on in-service engines. This proposed AD would require modification of the engine with an improved front bearing housing oil feed tube assembly. This proposed AD would also prohibit the installation of an affected front bearing housing oil feed tube assembly on any engine. The FAA is proposing this AD to address the un |
| Document number | 2026-16705 |

## Why this score


Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/08/17/2026-16705/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-engines). Last refreshed: 2026-11-04T09:17:43.641Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.