NTSB Probable Cause

POOR JUDGEMENT OF THE PILOT DUE TO CONSUMPTION OF ALCOHOL, FLIGHT BY THE PILOT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC), AND HIS FAILURE TO MAINTAIN CONTROL OF THE AIRCRAFT DUE TO SPATIAL DISORIENTATION. FACTORS RELATED TO THE ACCIDENT WERE: DARKNESS, ADVERSE WEATHER CONDITIONS, THE PILOT'S LACK OF TOTAL FLIGHT EXPERIENCE, AND HIS LACK OF EXPERIENCE/TRAINING FOR FLIGHT AT NIGHT OR IN INSTRUMENT WEATHER CONDITIONS.