Postaccident Examination Of The Airframe Revealed That The Right Control Stick Was Disconnected From The Stick Base Analysis: The two pilots departed on a personal cross-country flight in the airplane. ADS-B data showed that about 5 minutes after takeoff, the airplane climbed to about 2,550 ft msl on a south heading before it slowed to about 52 kts ground speed. The data then showed a rapid descent that exceeded 5,000 ft per minute before the data ended. The airplane was equipped with dual flight controls; however, it could not be determined which pilot was manipulating the controls at the time of the accident. Postaccident examination of the airframe revealed that the right control stick was disconnected from the stick base, and no corresponding bolt or nut was located within the wreckage.