MTU Aero Engines has successfully completed multi-week testing of its liquid hydrogen fuel system for the Flying Fuel Cell (FFC), which is an innovative propulsion concept using hydrogen and oxygen to generate electricity through a fuel cell. The tests validated the system's safety, reliability, and functionality, ensuring a regulated supply of preconditioned hydrogen to the fuel cell. Chief Engineer Barnaby Law expressed satisfaction with the results, emphasizing progress towards full electrification of the powertrain. MTU, in collaboration with MT Aerospace, is developing a complete liquid-hydrogen fuel system for commercial aviation, including tanks, sensors, heat exchangers, valves, safety systems, and controls. This milestone testing with liquid hydrogen is crucial as it is the actual operating medium for the FFC. The successful validation of the liquid hydrogen system's processes and functions sets a strong foundation for offering reliable and high-performing LH2 fuel solutions for various aircraft models in the future. Looking forward, MTU plans to initiate testing of a product-specific full-system FFC in 2026, with the liquid hydrogen system playing a key role in this innovative endeavor.