AeroDelft, a student-owned non-profit foundation in Delft, Netherlands, has made history by successfully testing an electric aircraft propulsion system powered by liquid hydrogen. The team collaborated with TNO in The Hague to conduct the test at a liquid hydrogen facility, demonstrating the viability of hydrogen as an alternative aviation fuel. Despite the unique challenges of working with liquid hydrogen, AeroDelft developed innovative solutions like a vacuum-insulated tank and an electric heat exchanger to ensure safe and efficient operation. The successful validation with liquid hydrogen marks a significant achievement in the team's mission to promote sustainable aviation. Project Phoenix, initiated in 2018, focuses on developing a manned liquid hydrogen-powered electric aircraft. AeroDelft's experience with battery-electric drones and gaseous hydrogen testing led them to pursue liquid hydrogen due to its superior energy density. The team's dedication to sustainable aviation and commitment to innovation have positioned them as leaders in hydrogen technology for aviation. The upcoming analysis of test data and refinement of the full-scale system are crucial steps towards realizing the first manned test flight of their liquid hydrogen-powered aircraft.