NTSB Probable Cause

THE IMPROPER DECISION BY THE NON-INSTRUMENT-RATED PILOT TO CONTINUE VFR FLIGHT INTO KNOWN INSTRUMENT METEOROLOGICAL CONDITIONS RESULTING IN SPATIAL DISORIENTATION AND LOSS OF CONTROL OF THE AIRPLANE. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE THE ACTIONS OF THE RADAR CONTROLLER WHOSE VECTORS AND NO-GYRO VECTORS MOST LIKELY CONTRIBUTED TO THE PILOT'S DISORIENTATION, THE ADVERSE WEATHER CONDITIONS, AND THE DARK NIGHT.