The BeautHyFuel project, backed by the French government, recently exhibited the capability of fueling a light aircraft with a liquid hydrogen-fueled combustion engine. The ground demonstrations, conducted in Grenoble, accumulated a total of 23 hours of run time, showcasing promising results. Using a 141hp regenerative turbine from Turbotech, along with components from Air Liquide and Safran, the system aimed to match the energy density of conventional fuels while considering retrofit, operability, and certification challenges. The project's success was highlighted by Safran, mentioning the comparable engine performance to kerosene and even slightly improved operability. The collaboration of partners including Elixir Aircraft and Daher contributed to the system's efficient performance. Despite showing full compatibility with aircraft integration, further development and testing are required for qualification and certification processes. The project's goals also included developing a methodology for powertrain retrofit. Earlier phases of the project explored gaseous hydrogen options for engine characterization. Research support from the French government's DGAC civil aviation agency under a post-pandemic stimulus programme underscored the importance of decarbonization and zero-emission flight initiatives in the aerospace industry.