Rolls-Royce recently completed tests in late 2022 on an AE2100 turboprop engine that was powered by liquid hydrogen instead of conventional jet fuel. This achievement represents a significant step forward in the aviation industry's efforts to achieve net-zero emissions. The development was supported by the European Union's Clean Aviation program, which aims to drive innovation and sustainability in aeronautics. While liquid hydrogen is seen as a promising solution for reducing aviation emissions, the transition poses various challenges for engine manufacturers like Rolls-Royce. Despite the obstacles, the industry is committed to exploring hydrogen propulsion to address environmental concerns. Experts, including Guy Norris from Aviation Week, are actively following and analyzing the progress made in hydrogen-powered aviation technologies. This development underscores the industry's dedication to adopting cleaner and more sustainable practices in aviation, with a focus on long-term environmental benefits.