The first hydrogen-powered live aircraft turnaround in the UK took place at Exeter Airport, demonstrating the viability of hydrogen in decarbonizing airport ground operations and achieving zero-carbon aircraft turnarounds. The trial involved a TUI Boeing 737 undergoing a turnaround with ground support equipment powered by green hydrogen. This initiative, supported by the UK Civil Aviation Authority's Hydrogen Challenge program, featured a variety of hydrogen-powered equipment and aimed to shape future safety and regulatory frameworks for hydrogen in aviation. The project contributes to the UK government's Jet Zero ambitions by promoting the adoption of low- and zero-emission aviation technology. Various stakeholders, including Exeter Airport, TUI, Cranfield University, ULEMCo, MULAG, and Boeing, participated in the trial to advance sustainable aviation practices. The collaboration also involved academic studies to inform future standards and procedures for net-zero aviation. The successful demonstration underscores the importance of hydrogen in decarbonizing ground operations and highlights the industry's commitment to sustainable technologies.