NTSB Probable Cause

LOSS OF CONTROL OF THE AIRCRAFT BY THE PILOT WHEN HE INADVERTENTLY ENTERED INSTRUMENT METEOROLOGICAL CONDITIONS. FACTORS CONTRIBUTING TO THE ACCIDENT WERE, DARK NIGHT LIGHT CONDITIONS AND FOGGY WEATHER CONDITIONS, INADVERTENT FLIGHT INTO IMC UNDER VISUAL FLIGHT RULES, FAILURE TO PERFORM A WEATHER EVAULATION AFTER RECEIVING PREFLIGHT WEATHER BRIEFING, SPATIAL DISORIENTATION AND LACK OF TOTAL INSTRUMENT EXPERIENCE.