What happened
The aircraft was cruising at 6000 ft MSL when the engine quit. The pilots set up a glide for Cynthiana/Harrison Arpt while trying to restart the engine. When it became apparent that they could not reach the arpt they headed for an open area. The acft went between 2 trees which took off both wings and the fuselage hit the ground hard. The acft then slid to a stop.
The investigation
When the engine was examined the fuel servo was found inoperative. This assembly P/N 2539806 was the subject of a Bendix Service Bulletin # RS-85 issued 6/20/83. Action recommended was to replace the diaphragm with a new one P/N 2541803. Service bulletins are not mandatory. This bulletin was made an airworthiness directive in 8/83.