On September 7, 1995, at 1000 central daylight time, a Cessna 172D, N2519U, was substantially damaged during a forced landing near Prim, Arkansas. The commercial pilot and his passenger were not injured. The airplane was being operated as a personal flight under 14 CFR Part 91. The flight originated at North Little Rock (IMI), Arkansas, at 0920 CDT. Visual meteorological conditions prevailed for the cross country flight for which a flight plan was not filed. According to the pilot, the airplane was in cruise flight en route to Calico Rock, Arkansas, when the engine started to loose power. After the pilot completed his emergency procedures and selected a field, the engine lost all power. The pilot further stated that on short final "the control wheel (yoke) broke off in my hand" and the airplane touched down "in a 10 to 20 degree nose down attitude." The nose gear collapsed and the engine mount was damaged during touchdown. The right wing and the underside of the fuselage also sustained structural damage. The reason for the complete loss of engine power and the fracture of the yoke assembly could not be determined.