NTSB Probable Cause

CONTINUED VFR FLIGHT BY THE NON-INSTRUMENT RATED PILOT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC), WHICH RESULTED IN THE PILOT'S LOSS OF AIRCRAFT CONTROL DUE TO DISORIENTATION, AND OVERLOAD FAILURE OF THE WINGS AND STABILATOR DUE TO THE PILOT EXCEEDING THE DESIGN STRESS LIMITS OF THE AIRCRAFT. FACTORS RELATED TO THE ACCIDENT WERE: THE ADVERSE WEATHER CONDITIONS AND THE PILOT'S LACK OF INSTRUMENT EXPERIENCE.