19970328003929A

On March 28, 1997, approximately 0909 central standard time, a Beech G33 airplane, N166B, was substantially damaged during a forced landing following a loss of engine power near bixby, Oklahoma. The commericial pilot and his passenger were not injured. The airplane was owned and operated by the pilot under title 14 CFR part 91. Visaual meteorological conditions prevailed for the personal cross country flight which originated from Richard Lloyd Jones jr. airport in Tulsa, Oklahoma, approximately 15 minutes before the accident. No flight plan had been filed. The pilot reported to the investigator in charge (iic) that he had just leveled off at 7500 feet when the engine started to "shake violently". The pilot reveresed the airplanes course to fly back to the point on departure when the engine "stopped", and oil started to appear on the windshield. A forced landing was performed in an open field. The pilot to the iic that on short final, the airplane hit a transmission wire and he subsequently was delayed in lowering the landing gear. The airplane landed with the landing gear in transition. The passenger reported that the airplanes impact with the ground was "severe," and the "pilot d id a good job bringing the airplane to a halt." The fuselage, engine mount, and fire wall were twisted: and, the airframe structure around all three landing gear was damaged. Postcrash examinaiton of the engine revealed a hole in the ending case. Several weeks after the accident, the engine was torn down. The FAA inspector assigned to this accident reported to the iic that the rod bolt head to the number two clyinder was found on the bottom of the engine case in "relatively undamaged condition" he further stated that ahe believed that the rod bolt was "either over torqued or under torqued during engine assembly which led to the bolt failure and the nunber two rod failure well before tbo". According to the airplanes engine logbook and the pilots flight logbook, the engine had run approximately 604 hours since being overhauled in August of 1991. The iic had three telephone conversation with the pilot who willingly provided information. The pilot stated that he had ntsbs pilot/operator aircraft accident report(6120.1/2) form "right on my desk." He further stated that he would "mail it in a couple of days." The iic never received teh 6120.1/2 from the pilot. (-23) the Beechcraft, N166B, with the pilot, and one passenge took off rom r.l. Jones arpt. (Rvs), Tulsa, OK, at 08:45, 03/28/97, bound for little rock (lit). As the aircraft leveled out at approximately 7500 ft., the engine began to run very rough. The pilot was attempting to return to rvs, when the engine quit running and oil showed up on the windshield. The pilot was able to land in an open field at approximately 09:05, 03/28/97, after collisin with an electric wire. During landing, the landing gear was in transit, and not completely extended. Structural damage occurred to the fuselage and wings in the wheel well area. Upon inspection it was found that a piston rod had failed and broke a hole in the top of the crank case near the magneto. The magnetos were broken loose from their mounts. Aircraft released to owner. A teardown inspection of the engine will be accomplished to determine cause of the piston rod failure.