What happened
During a solo training flight, the pilot encountered a loss of control over the airframe. The incident resulted in the aircraft crashing directly into the waters of the Trondheim harbor. Following the impact, the pilot was rescued but sustained injuries. The aircraft suffered extensive damage and was declared a total loss.
Findings
The source material indicates that the primary event leading to the accident was the loss of control by the pilot while conducting training maneuvers. No further specific contributing factors or mechanical failures are detailed in the available records.