https://www.airbus.com/en/newsroom/press-releases/2017-10-cityairbus-demonstrator-passes-major-propulsion-testing-milestone
CityAirbus demonstrator passes major propulsion testing milestone | Airbus
cityairbusdemonstratorpassesmajorpropulsion
https://www.ainonline.com/aviation-news/business-aviation/2019-03-02/cityairbus-demonstrator-approaches-first-flight
CityAirbus Demonstrator Approaches First Flight | Aviation International News
Ground testing began in February.
first flightcityairbusdemonstratorapproachesaviation