D Perry, ZeroAvia outlines progress as it sticks to 2026 service-entry target, Flight International, September 2024, p 30

In the hydrogen fuel-cell aviation world, ZeroAvia confirms that it remains on track to achieve certification of its system, and will install it aboard a Cessna Caravan next year. Part of its development involves a Dornier Do 228 twin turboprop, and a second Dornier to explore the power generation system.