Green hydrogen provides excellent opportunities for emissions reduction, prompting many sectors to consider this sustainable energy carrier. With its properties differing fundamentally from conventional fuel, hydrogen implies principal adaptations of technological solutions, designs, and processes along the entire fuel life cycle. Evaluation of its applicability to the aviation sector requires an in-depth understanding of the implications of a full energy system transition. Drawing on the enabling interdisciplinarity of the Bauhaus Luftfahrt team, we strive for holistic answers to the key questions around hydrogen aviation.