The National Transportation Safety Board report said, "The pilot attempted an operation exceeding his experience and ability level, continued visual flight rules under adverse weather conditions and experienced spatial disorientation in the last moments of the flight." Marciano was on his way to give a speech to support his friend's son and there was a surprise birthday celebration waiting for him. He had hoped to return in the early morning for his 46th birthday celebration with his wife. He was coming from a dinner in Chicago at STP CEO Andy Granatelli's home.