Airbus has made significant strides in its journey towards zero-emission aviation by successfully conducting tests on its 'iron pod' hydrogen fuel cell system, which is intended for use on an Airbus A380 aircraft by 2026. This achievement is part of the company's ZEROe project, which focuses on developing sustainable fuel systems to support its zero-emission initiative. The 'iron pod' features a hydrogen-propulsion system that includes electric motors and control units, allowing for the spinning of a propeller. These tests, conducted at 1.2 megawatts, represent a crucial milestone towards the goal of launching a hydrogen-propulsion aircraft by 2035. Hydrogen fuel cells play a vital role in decarbonizing aviation, but the challenge of energy efficiency and weight management led Airbus to collaborate with ElringKlinger in forming Aerostack, a joint venture aimed at developing high-energy fuel cell stacks. Extensive testing on the fuel cell system was carried out in Ottobrunn, Germany, close to Munich, at the E-Aircraft System House (EAS), Europe's largest facility for testing alternative propulsion systems. The successful testing of the hydrogen fuel cell system, with a power level of 1.2 megawatts, set the stage for integrating the full propulsion system with the electric motor. The recent milestone of powering up the electric motors of the 'iron pod' using hydrogen fuel cells signifies a significant advancement for the ZEROe project. This testing phase allows engineers to observe the interaction of various systems and make necessary adjustments to ensure readiness for flight. Future plans involve continued testing and optimization of the propulsion system for the A380 demonstrator, focusing on aspects like size, weight, and performance under varying conditions such as vibration and altitude. By harnessing the potential of hydrogen fuel cells, Airbus is driving innovation towards sustainable aviation with minimal environmental impact.