The ZA2000 system developed by ZeroAvia, a hydrogen-electric modular powertrain with power ranging from 2 to 5 MW, aims to revolutionize regional aviation. This technology, designed for regional turboprops carrying 40 to 80 passengers, boasts impressive efficiency of 45-60%, significantly higher than traditional engines. Scottish airline Loganair partners with ZeroAvia to introduce these hydrogen-powered engines to its fleet, with plans to transform British and European regional routes into emission-free flights. ZeroAvia's $150 million investment from Airbus and American Airlines is allocated to developing two engine systems, including the ZA2000 and the ZA600 for smaller aircraft. The technical comparison reveals the ZA2000's advantages over conventional engines in terms of efficiency, fuel consumption, and emissions reduction. The hydrogen system not only offers environmental benefits but also promises economic advantages through reduced maintenance costs and potential long-term cost savings. While ground transportation faces challenges in adopting hydrogen due to high costs and environmental concerns, aviation provides a fertile ground for this technology, especially for regional turboprops operating within specific altitude constraints. The establishment of ZeroAvia's manufacturing center in Glasgow signifies Scotland's commitment to sustainable aviation. The Loganair-ZeroAvia partnership could spearhead the adoption of hydrogen engines in European regional aviation, potentially offering a competitive edge in environmentally conscious markets. With the promise of improved operational reliability and economic feasibility, the future outlook for hydrogen aviation appears promising, showcasing a shift towards sustainable technologies in the aviation sector.