Gene Medi/NurPhoto via Getty ImagesA Swiss International Air Lines flight made an emergency landing last month.The Airbus A220's cabin was filled with smoke after encountering an engine problem.An autopsy said a flight attendant died due to hypoxic brain damage, Blick reported.A 23-year-old Swiss International Air Lines flight attendant died due to a "severe lack of oxygen to the brain," according to an autopsy reported by Blick, Switzerland's largest newspaper.It comes after an incident on December 23, when Swiss Flight 1885 encountered engine problems, and the cabin was filled with smoke.The Airbus A220 was flying from Bucharest, Romania, to Zurich when it made an emergency landing in Graz, Austria.All 74 passengers and five crew members were evacuated, 17 of whom required medical attention, the airline said.A week later, Swiss announced that one of the flight's cabin crew members died in the hospital in Graz."We are devastated at our dear colleague's death," said CEO Jens Fehlinger.