KLM Royal Dutch Airlines (KLM) and ZeroAvia have announced a partnership to work towards a demonstration flight using ZeroAvia's ZA2000 zero-emission, hydrogen-electric engines for large regional turboprops. These engines utilize hydrogen in fuel cells to produce electricity, powering electric motors that drive the aircraft's propellers, with the only emission being low-temperature water vapor. The collaboration aims for a 90% reduction in climate impact compared to conventional kerosene-fueled flights, with an initial A-to-B flight demonstration planned between two airport locations in 2026. Immediate efforts include selecting suitable airports, obtaining regulatory permits, ensuring the availability of liquid hydrogen fuel, and establishing the necessary infrastructure for refueling the aircraft. This partnership signifies a significant milestone towards cleaner flights on KLM's network and seeks to hasten the development of operational concepts for hydrogen aircraft across the European Union. KLM is committed to sustainability and is embracing advanced technologies like hydrogen and electric aviation as key pillars for decarbonizing the aviation sector. Furthermore, KLM and Air France's maintenance divisions have been collaborating with ZeroAvia to prepare for maintenance, repair, and overhaul (MRO) operations for hydrogen fuel cell planes. ZeroAvia has made significant progress in testing its ZA600 engine prototype and advancing ground tests in the UK and the US for the ZA2000 system. The ZA2000 engine system is designed to support regional turboprop aircraft with up to 80 seats, such as the ATR72 and Dash 8-400. These developments represent a substantial leap forward in the utilization of hydrogen-electric technology in aviation, demonstrating a positive step towards sustainable air travel and reduced environmental impact.