NTSB Probable Cause

THE PILOT'S POOR JUDGEMENT OF INTENTIONALLY FLYING INTO AN AREA OF KNOWN FORECAST ICING CONDITIONS WHICH RESULTED IN A LOSS OF CONTROL AND AN INFLIGHT BREAKUP OF THE AIRCRAFT. CONTRIBUTING FACTORS WERE THE PILOT'S OVERCONFIDENCE IN HIS PERSONAL ABILITY BY ATTEMPTING FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS, AND THE ADVERSE WEATHER CONDITIONS.