Serious incident to the Airbus A321 registered SE-DMS operated by SAS on 20/12/2023 near Copenhague

Preliminary data from the notification of the Danish authorities:

Shortly after departure at approximately 20-25,000 ft the crew felt an electrical smell. They put on masks and declared Mayday, applied squawk 7700 and returned to CPH. On ground they taxed to stand H104. Crew onboard was two pilots, no cabin crew, no passengers, as this was a positioning flight for technical reasons