The flying boat was a Short Sandringham, registration LN-IAW and named "Bukken Bruse" (after the fairy tale "The Three Billy Goats Gruff"). The plane, operated by Det Norske Luftfartsselskap, now a part of SAS, was en route from Fornebu by Oslo.
The weather upon landing in Hommelvika was poor, and the sea in Hommelvika was foaming white. When the plane was about to land in the water, it was hit by a wind gust, the pilots lost control of the aircraft, and the right pontoon broke as it hit the water. The plane rolled over to the side and the front tipped onto the water.