A flight attendant aboard a Swiss aircraft that made an emergency landing in Austria due to smoke in the cabin has died, the airline said Tuesday.

The flight from Bucharest to Zurich on Dec. 23 was diverted to Graz after engine problems and smoke filled the cockpit and the cabin, Swiss International Air Lines said in a statement.

It said the attendant died Monday in intensive care in the hospital in Graz. The attendant was one of two crew members who were hospitalized. All 74 passengers aboard the Airbus A220-300 were evacuated after flight LX1885 landed safely, Swiss said.