Occurred on January 21, 2020 / Bucharest, Romania
Info from Licensor: "It happened in a Ryanair aircraft, about 10min after takeoff from Bucharest Airport. The only thing that the captain said was that we need to land back in Bucharest but didn't say at the time what was the cause of the incident and so much smoke. No oxygen masks came down either. That was the first flight of that aircraft after being with the engineers for one month for maintenance work."