What happened
On a flight from Zurich Airport to Hamburg-Helmut Schmidt Airport, a single-engine aircraft departed from Runway 28 at 11:34 local time. The flight was being operated under instrument flight rules (IFR) and was carrying two people: the pilot and one passenger.
While traversing the area above the city of Konstanz at an altitude of 16,750 feet, the aircraft began an uncontrolled descent. The plane eventually impacted the surface of Lake Constance, settling approximately 200 meters away from Mainau Island. Search efforts located the wreckage at a depth of 60 meters.
Findings
There were two fatalities resulting from the accident. The investigation confirmed that the aircraft entered a loss of control during the descent phase of the flight.