PLT OF AN SMT TWIN ENG ACFT MADE AN EMER LNDG AFTER 1 ENG FAILED DURING CRUISE.

Narrative

I DEPARTED FROM ROCHESTER; MN; AT APPROX XA30 LCL TIME. BEFORE TAKING OFF I HAD COMPLETED A THOROUGH PREFLT AND RUNUP (INCLUDING FUEL QUANTITY AND QUALITY). THE MAIN TANKS WERE TOPPED OFF -- 100 GALLONS OF FUEL. THE OIL LEVEL WAS AT 10 QUARTS N EACH ENG. ON THE RUNUP THE MAGNETOS DROPPED 50 RPM EACH. THE PROPS WERE EXERCISED AND ALL ENG GAUGES WERE IN THE GREEN. THERE WAS NO INDICATION OF ANY ENG PROBS ON THE RUNUP OR ON TKOF. UPON REACHING FL190 ALL ENG GAUGES WERE STILL INDICATING IN THE GREEN. AFTER BEING AT CRUISING ALT (FL190) FOR 5 MINS; THE R ENG FAILED. I WAS APPROX 20 MI N OF DUBUQUE; IA. I STARTED A STEADY DSCNT AND INFORMED ATC. AS ATC VECTORED ME TO DUBUQUE I ATTEMPTED TO RESTART THE ENG. THE ENG DID NOT RESTART. I TRIED ONE MORE TIME TO RESTART THE ENG. THEN I WENT AHEAD AND SHUT IT DOWN. I HAD A SAFE LNDG AT DUBUQUE. AFTER LOOKING AT THE ENG MY GUESS IS THAT IT HAD BLOWN A ROD. UNDER THE CIRCUMSTANCES I DID EVERYTHING I COULD. THERE WAS NO INDICATION OF ENG PROBS PRIOR TO ITS FAILURE. I CALMLY HANDLED THE SIT AND THE FLT CAME SAFELY TO REST AT DUBUQUE. THE ACFT WAS LIGHT (I WAS THE ONLY ONE ON BOARD) SO I HAD NO PROB MANEUVERING AND MAINTAIN ALT WITH 1 ENG. I WAS IN AND OUT OF CLOUDS DURING THE DSCNT. BUT ENCOUNTERED NO ICING. DUBUQUE WAS VFR. THE ACFT WAS A CESSNA 340.