Accident
The crew departed Zagreb Airport on a training flight to Zadar. While descending to Zadar Airport, the aircraft encountered marginal weather with icing conditions. At an altitude of 6,500 feet in clouds, the aircraft lost height and crashed in the Velebit Mountain Range. The aircraft was destroyed by impact forces and all four occupants were killed.
Investigation
The official investigation determined that the most probable cause of the accident was the entry with an uncertified aircraft into icing conditions and in mountain waves. According to the findings, the plane most likely froze on its tail first. After the plane most likely froze completely, it became too heavy, entered mountain waves, became completely uncontrollable, after which it crashed at a sharp angle from a height of about 6,500 feet and hit a hill at the foot of Vaganski Vrh. Due to the force of the impact, the plane completely disintegrated.