What happened
The aircraft was operating a scheduled service from Oslo to Tromsø with an intermediate stop at Trondheim. While on final approach to the bay of Stjørdal, located approximately 25 km east of Trondheim, the pilot in command faced marginal weather conditions characterized by strong crosswinds.
During the landing phase over rough sea conditions, the seaplane experienced a bounce and subsequently struck the water surface with significant force. The impact caused the fuselage to fracture into two sections, resulting in the separation of the forward section, including the cockpit, from the remainder of the airframe. Sixteen passengers and three crew members were killed in the incident.