Date:	Wednesday 20 December 2023
Time:	08:05
Type:	Airbus A321-253NX
Owner/operator:	SAS Scandinavian Airlines
Registration:	SE-DMS
MSN:	10500
Year of manufacture:	2021
Engine model:	CFMI CFM LEAP-1A33
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Minor, repaired
Category:	Serious incident
Location:	near Copenhagen -   Denmark
Phase:	En route
Nature:	Ferry/positioning
Departure airport:	København-Kastrup Airport (CPH/EKCH)
Destination airport:	Oslo-Gardermoen Airport (OSL/ENGM)
Investigating agency:	HCLJ
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
SAS flight SK9228, an Airbus A321-253NX, had departed Copenhagen Airport (CPH) when at approximately FL200-FL250 the crew noticed an electrical smell. They put on masks and declared Mayday, applied squawk 7700 and returned to CPH. Crew onboard was two pilots, no cabin crew, no passengers, as this was a positioning flight for technical reasons.

Maintenance crew inspected the avionics compartment. In the contactor box 107VU, the maintenance crew noticed a GFI relay (124QH) with black soot and a burnt hole in the plastic housing. A CT scan confirmed that overheating had occurred inside the GFI relay.

https://bea.aero/en/investigation-reports/notified-events/detail/serious-incident-to-the-airbus-a321-registered-se-dms-
operated-by-sas-on-20-12-2023-near-copenhague/
https://www.flightradar24.com/data/aircraft/se-dms#334de042

Date/time	Contributor	Updates
12-Jan-2024 10:09	harro	Added
12-Jan-2024 10:10	harro	Updated [Other fatalities, ]
17-Dec-2024 16:44	ASN	Updated [Narrative, Accident report, ]