A flight attendant has died after the cabin of the plane he was working on filled with smoke

• A Swiss flight attendant was hospitalized after a plane's cabin filled with smoke mid-flight.

• The December 23 flight from Bucharest to Zurich was diverted due to engine issues and smoke.

• The crew member, who hasn't been named, died about a week after being hospitalized.

A young Swiss International Air Lines flight attendant died a week after being exposed to smoke that filled the cabin and cockpit during a flight he was working.

The December 23 flight from Bucharest, Romania, to Zurich made an emergency diversion to Graz, in southern Austria, after engine problems spread smoke through the plane, the airline said in a press release.

The crew member, who has not been named publicly, was airlifted to a hospital in Graz, where he was in intensive care. He died on Monday.

"We are devastated at our dear colleague's death," Jens Fehlinger, Swiss International Air Lines' CEO, said in a statement.

"We stand with one another at this truly difficult time; and we will be doing our utmost, together with the relevant authorities, to determine the causes involved," Oliver Buchhofer, the airline's chief operating officer, said.

"We have many questions, and we want them answered," he added.

All 74 passengers on board the Airbus A220 were evacuated. Twelve passengers and all five crew members received medical attention.

"Our teams of experts are working hard over the festive season to evaluate all the facts and findings available, and are in close contact with the authorities," the airline said about the investigation into the incident.

The investigation is focused on the aircraft's mechanical parts, including the engine, and the protective breathing equipment available to the cabin crew.

Swiss announced it was working with the relevant authorities, the engine manufacturer Pratt & Whitney, and the aircraft manufacturer Airbus.

"The initial findings point to a technical problem in one of the engines," it said in the press release, but the cause of the smoke has not yet been conclusively determined.

A special flight from Graz to Zurich was organized on the morning of Christmas Eve to get passengers to their destination.

Read the original article on Business Insider