Rockwell Gulfstream 690D Jetprop 900

The passenger flying the airplane made a hard landing after the pilot had experienced an incapacitating cardiac event. Shortly after takeoff the pilot turned the plane around to return to the departure airport. He started coughing and then went unconscious. The passenger in the right seat, who had no piloting experience, took control of the airplane and made several landing attempts. During the fourth landing attempt he stalled the airplane at a low altitude. The airplane impacted terrain, landing flat on its belly a few hundred feet short of the runway. The autopsy report attributed the pilot's cause of death to arteriosclerotic cardiovascular disease.

The twin engine aircraft departed Vienna-Schwechat Airport in the morning on a special flight to Hohenems-Dornbirn Airport, carrying nine passengers and two pilots, among them Alfred Dallinger, Austrian Minister of Labor. While descending to Hohenems Airport, the crew encountered poor weather conditions and decided to divert to Altenrhein Airport, Saint-Gall, Switzerland. At 1054, the aircraft passed the Altenrhein VOR at an altitude of 2,000 feet with an horizontal visibility estimated to 3-4 km with nebulosity. After completing the last turn to join the glide for a runway 10 approach, the aircraft was still over clouds at a 2,000 feet QNH altitude. Suddenly, the aircraft struck the water surface and crashed in the lake of Constance (Bodensee) about 5,100 meters short of runway 10 threshold. The wreckage was found off the village of Horn. The aircraft was destroyed by impact forces and all 11 occupants were killed.

At 1042 mdt, the flight reported moderate turbulences at FL240, but elected to remain at that altitude. At 1055, they were cleared to descend at pilot's discretion to maintain 12,000 feet. Approximately 8 minutes later, shortly after beginning a descent, the flight was instructed to change frequency; but 21 seconds later, they replied 'standby please,' then radio and radar contact were lost. Wreckage was found approximately 26 miles east of the destination airport in mountains. An examination revealed the empennage had separated in flight; pieces of it were found up to one mile away with indication of overload failure. There was evidence that: engines were not operating at ground impact, ignition switches were engaged; left engine start switch was in the 'air' start position and right switch was beyond the 'ground' start position; right propeller was feathered; pax oxygen masks were deployed, indicating cabin had depressurized above 15,000 feet. Weather info indicated cloud bases at 10,000 feet with IMC and turbulences to 25,000 feet, mixed icing from 20,000 feet to 25,000 feet, light rain/snow showers, widely scattered thunderstorms; approximately 15 miles south, 4 inches to 5 inches of hail fellat approximately that time. TPE331 engines had history of flameouts due to ice ingestion caused by impossible use of anti-ice/ignition. All six occupants were killed.