What happened
While maintaining a cruising altitude approximately 80 km south of Oslo, smoke began to spread throughout the cockpit. In response to the deteriorating conditions, the pilot reduced the aircraft's altitude and initiated an emergency landing procedure near Fredrikstad. The aircraft ultimately ditched into the water. Rescue operations were conducted swiftly by the crew of a nearby ship, who managed to save eleven passengers from the wreckage. Tragically, the remaining nine occupants did not survive the incident. This group included all three members of the flight crew.
Findings
The official investigation concluded that the emergency was triggered by an accidental activation of a signal flare within the cockpit area. This malfunction resulted in the rapid spread of smoke, which compelled the pilot to abandon the aircraft and ditch it into the sea.