The Part 21 permit will allow the first test flight of the 600kW hydrogen-electric powertrain following a successful ground testing campaign and review of the full development programme.

Fitted with an engineering testbed configuration to incorporate ZeroAvia’s hydrogen-electric engine powering the propellor on its left wing, operating alongside a single Honeywell TPE-331 stock engine on the right, the 19-seat aircraft is set to take to the UK’s skies.

Coming as a landmark achievement for the company and the UK Government’s ATI Programme backed HyFlyer II project, which set out to develop a 600kW hydrogen-electric powertrain for 9-19 seat aircraft, the tests could pave the way for hydrogen-powered flight.

Read more: ZeroAvia achieves new milestone in its HyFlyer II programme that aims to target the development of a hydrogen fuel cell powertrain

ZeroAvia has said, for the testing programme it has worked with the CAA in meeting a “far more stringent” set of requirements when compared to the E-Conditions framework it used for its 6-seat prototype in 2020.

Part 21 is used to describe the regulatory approval of aircraft design and production organisation, and the certification of products, parts, and appliances for aircraft.

“Earning our full Part 21 permit to fly with the CAA is a critical milestone as we develop a zero-emission aviation propulsion system that will be the most environmental and economical solution to the industry’s climate impact,” said Val Miftakhov founder and CEO of ZeroAvia.

“We’re going to be starting 2023 in the best way possible, by demonstrating through flight that true zero-emission commercial flight is much closer than many think,” he added.

It is hoped the testing programme will lead to a commercially certifiable configuration for the ZA600 to be submitted by the end of 2023, ahead of its plans to deliver the powertrains for the first commercial routes to commence in 2025.

ZeroAvia says it has 1,500 engines under pre-order, seven partnerships aircraft manufacturers, and multiple fuel and airport partnerships, the company believes it is well positioned to lead the aviation industry’s transformation to a clean future.

A Successful Ecosystem for Green Hydrogen – Iceland

It is becoming ever clearer that the entire green hydrogen ecosystem requires alignment. Hydrogen’s potential, performance, and safety are proven. Green hydrogen is widely accepted as a core pathway to Net Zero, yet the key levers in the transition are not yet in-sync.

For these reasons, H2 View is launching An Ecosystem for Green Hydrogen, a two and a half day summit in Reykjavík, Iceland on February 28 to March 2, 2023, devoted to thought leadership, insights, and actionable takeaways for the green hydrogen ecosystem.

In a world full of distractions and technical overload, we need inspiring places to refresh our minds and bodies. The power of Iceland lies in its nature, culture, and energy. These elements serve as the perfect backdrop for a memorable and effective event at the world renowned Harpa Centre.

The summit promises to tackle all sides of the energy ecosystem, from wind and solar power requirements, through to additionality, water sustainability, electrolyser technologies, and the investment and policy climate. The 2.5 day event is split over six sessions, delegates will hear from speakers representing all strands of the hydrogen value chain in a bid to unravel key issues in the industry, and where it can make some headway.

You can find more information at