The Voksenkoll accident was a tragic plane crash that occurred on December 18, 1945, when a Canadian military Douglas C-47 Skytrain (Dakota) flew into the southern slope of Voksenkollen in Oslo. The aircraft was en route from England via Copenhagen to Fornebu Airport, but due to thick fog and poor visibility, it was diverted toward Gardermoen. During the flight, the plane experienced severe icing on its wings caused by supercooled rain, which significantly reduced its lift and prevented the pilots from gaining enough altitude to clear the ridge. The aircraft eventually struck the hillside and caught fire near the ruins of the former Anne Kure’s Hotel.

Out of the 19 people on board, a total of 17 lost their lives; 15 died instantly at the scene, while two others succumbed to their injuries in the hospital. Among the casualties were two Norwegians: the well-known resistance fighter Hjalmar Steenstrup and naval lieutenant Inge Johansen. Rescue efforts were severely hampered by heavy snow and icy road conditions, which significantly delayed the arrival of the fire department and emergency services. Most of the fallen soldiers are today buried at the war grave section of Vestre Cemetery (Vestre gravlund) in Oslo.