An Air France spokesperson stated that the oxygen masks were deployed as a precaution since the automatic mask drop altitude had not been reached. The airline emphasized that safe

"We are devastated at our dear colleague's death," Swiss Chief Executive Officer Jens Fehlinger said in a statement.

The Airbus A220-300 was diverted to Austria on Dec. 23 "after engine problems occurred" and smoke filled the cabin, according to airline officials

Accompanying footage shows the aftermath of the incident, in which shaken passengers are seen muttering in hushed tones with the oxygen masks dangling in front of their faces.