Opportunity
Federal Register #FAA-2026-8807
FAA Airworthiness Directive: Replacement of Hydro-Mechanical Units on Airbus A350-941 (Rolls-Royce Trent XWB Engines)
Buyer
Federal Aviation Administration
Posted
September 22, 2026
Respond By
November 06, 2026
Identifier
FAA-2026-8807
NAICS
336412, 336413
This opportunity involves a proposed airworthiness directive from the Federal Aviation Administration (FAA) for Airbus A350-941 airplanes equipped with Rolls-Royce Trent XWB engines. - Government Buyer: - Federal Aviation Administration (FAA), Aircraft Certification Service, Airworthiness Products Section, Operational Safety Branch - OEMs and Vendors: - Airbus SAS (airframe manufacturer) - Rolls-Royce plc (engine manufacturer) - Products/Services Requested: - Replacement hydro-mechanical units (HMUs) for Rolls-Royce Trent XWB-84, XWB-84EP, and XWB-75 engines - Part numbers: G5000HMU02 and G5000HMU03 - Quantity: 76 units each (2 per airplane, 38 airplanes) - Unique/Notable Requirements: - HMUs must be replaced before reaching reduced life limits or within 30 days after directive effectiveness - Installation of affected HMUs is restricted under certain conditions - Compliance with European Union Aviation Safety Agency (EASA) AD 2025-0183 is required - Directive addresses safety risks from wear-induced stiction in the combining spill valve, which could cause internal fuel leaks, reduced fuel flow, thrust shortfalls, and diminished engine control - Estimated contract value per airplane is up to $2,083,630 for two HMUs, affecting 38 U.S.-registered airplanes
Description
The FAA proposes a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 airplanes due to reports of engine health monitoring messages requiring premature removal of hydro-mechanical units (HMUs). The AD would require replacing certain HMUs before reaching a reduced life limit and limit the installation of affected parts under certain conditions. This action addresses an unsafe condition that could lead to unintended internal fuel leaks, reduced fuel flow, potential thrust shortfalls, and reduced control of the airplane. Comments on the proposed AD are due by November 6, 2026.