Federal Register #FAA-2026-8781

FAA Airworthiness Directive for Rolls-Royce Deutschland Trent XWB Engine Oil Feed Tube Modification

The Federal Aviation Administration (FAA), under the Transportation Department, is proposing a new airworthiness directive for Rolls-Royce Deutschland Trent XWB engines. - Government Buyer: - Federal Aviation Administration (FAA), Transportation Department - OEMs and Vendors: - Rolls-Royce Deutschland Ltd & Co KG (OEM) - Products/Services Requested: - Modification of Trent XWB-75, XWB-79, XWB-79B, and XWB-84 engines - Installation of improved front bearing housing oil feed tube assembly - Prohibition of installation of affected (old) oil feed tube assemblies - Estimated 80 engines affected - Unique/Notable Requirements: - Compliance must follow procedures in EASA AD 2024-0070 (incorporated by reference) - No reporting requirement to the manufacturer - Directive addresses unsafe oil pressure condition that could lead to engine shutdown or loss of airplane control

Description

The FAA proposes a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG Model Trent XWB-75, XWB-79, XWB-79B, and XWB-84 engines. This AD is prompted by reports of lower than expected differential oil pressure measurements on in-service engines. The directive would require modification of the engine with an improved front bearing housing oil feed tube assembly and prohibit installation of the affected assembly on any engine. The FAA aims to address the unsafe condition that could lead to engine in-flight shutdown or loss of airplane control.

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