In Quebec, Canada, Unither Bioelectronique (UB) achieved several aviation firsts with the successful maiden flight of a piloted hydrogen fuel cell-powered helicopter at Bromont airport. The modified Robinson R44 helicopter, powered by a hydrogen fuel cell powertrain and a small battery pack, demonstrated the viability of hydrogen technology for aviation. UB highlighted that 90% of the flight's energy requirements were supplied by the fuel cell stacks. This milestone flight is seen as a crucial step in advancing conforming designs and certification protocols for hydrogen-powered aircraft. UB's collaborative effort with Robinson under Project Proticity targets the development of zero-emission helicopters, focusing on extending the range for vital missions like organ delivery. The successful hover and manoeuvre capabilities of the hydrogen powertrain pave the way for integrating a liquid hydrogen storage system to support extended-range missions. The industry recognizes this achievement as a significant advancement towards long-range, zero-emission vertical flight. David Smith of Robinson Helicopter lauded the milestone, emphasizing its importance in the journey towards decarbonizing the aviation sector.