The Douglas DC-3 departed Kuopio Airport at 21:31 local time, climbing into a windy autumn night. Most of its fifteen passengers were politicians and business leaders returning from a National Defence Course organized by the Finnish Defence Forces. Within moments of becoming airborne, the right engine lost power. Pilot Kari Halmetoja radioed flight control about the problem and attempted to turn back toward the airport. Seconds later, the aircraft struck the dark surface of Lake Juurusvesi near Rissala. There was no time for an emergency approach, no second chance. Everyone on board perished in what remains the worst accident in Finnish Air Force history and the third-deadliest aviation disaster in Finnish history overall.

Investigators traced the engine failure to metal fatigue in one of the right engine's cylinders, which had cracked an exhaust valve. The aircraft carried no flight recorder, so the crew's precise actions during those final seconds could not be reconstructed with certainty. The investigation board concluded that the pilot likely banked too steeply during the return turn. A DC-3 can fly on a single engine, and the board speculated that the crew may have been distracted by engine fire drills rather than concentrating on single-engine flight procedures. Without a black box, those conclusions remained educated inferences rather than confirmed facts.

Among the dead were three sitting members of the Finnish Parliament: Olavi Majlander, Arto Merisaari, and Kirsti Hollming. The remaining passengers included prominent businessmen and military officials, the kind of people whose absence leaves gaps in committees, boardrooms, and legislative chambers. The crash carried an eerie dimension of chance. Halonen's doctor had grounded her because of her pregnancy. Hollming had not been scheduled to fly but accepted a last-minute seat after her speaking engagement ran late. The randomness of who lived and who died that night lingered in Finnish public memory for decades.

The disaster accelerated the retirement of the Finnish Air Force's aging DC-3 fleet by two years, replacing them with modern Fokker F.27 turboprops. Both military and Finnair civilian pilots received expanded training for engine failure emergencies and challenging wind conditions. A memorial was erected at Utti Airport, where the flight had originally departed before its stop in Kuopio. The crash became a touchstone in Finnish aviation safety, a reminder that aging airframes and inadequate emergency procedures carry costs measured in lives. That Tarja Halonen went on to serve as President of Finland from 2000 to 2012 adds a haunting footnote: history pivoted on a doctor's advice given to a pregnant woman on an October afternoon.