NTSB Probable Cause

THE PILOT'S CONTINUED VFR FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC), AND HIS FAILURE TO MAINTAIN CONTROL OF THE AIRCRAFT DUE TO SPATIAL DISORIENTATION. FACTORS RELATED TO THE ACCIDENT WERE: COMPANY INDUCED PRESSURE TO MAKE THE FLIGHT, THE PILOT'S DECISION TO INITIATE FLIGHT INTO KNOWN ADVERSE WEATHER CONDITIONS, HIS LACK OF INSTRUMENT EXPERIENCE, HIS OVERCONFIDENCE IN HIS PERSONAL ABILITIES, AND THE ADVERSE WEATHER CONDITIONS.