ZeroAvia, a company focused on developing hydrogen-electric aviation solutions, has achieved a significant milestone with its 600kW hydrogen-electric propulsion system receiving an Issue Paper from the US Federal Aviation Administration. This paper confirms the certification basis for the system, setting the stage for its journey towards full approval and commercialization. By defining the airworthiness regulations the system must adhere to, the FAA's recognition supports ZeroAvia's ongoing efforts to certify its innovative powertrain with the UK Civil Aviation Authority. This regulatory milestone enables ZeroAvia to validate its design and make strides in the approval process. Val Miftakhov, the CEO and Founder of ZeroAvia, highlighted the importance of this achievement, emphasizing how certifying and selling the 600kW electric propulsion system will broaden the company's market opportunities and contribute to a cleaner future of aviation. The company's commitment to advancing clean flight technology is evident in this development, showcasing a positive outlook for the future of hydrogen-electric propulsion in the aviation industry.