C210 PLT HAD THE PROP GO INTO FLAT PITCH RESULTING IN AN ENG OVERSPD. WHILE LNDG; HE HAD AN NMAC WITH A LIGHT TWIN.

Narrative

I WAS IN FLT FROM 8300 FT TO ZAO AT 6500 FT WHEN I NOTICED THAT THE NOISE IN THE COCKPIT GOT LOUDER. I CHKED MY ENG RPM AND THE ENG WAS OVER-REVVING TO 3000 RPM. I PULLED THE PWR BACK TO BELOW 15 INCHES MANIFOLD PRESSURE TO GET THE ENG BACK TO 2500 RPM. I MOVED THE PROP GOVERNOR IN AND OUT TO GET THE PROP TO RESPOND. THIS DID NOT HELP MY RPM PROB. I WAS WITHIN 5 MI TO GVL WHEN THE PROB OCCURRED AND I BEGAN MY DSCNT INTO THE ARPT. I MADE 2 PASSES AROUND THE FIELD TO OBSERVE ACFT TFC AND LOOSING ALT. I CALLED UNICOM FOR ACTIVE RWY; BUT NO ANSWER. RWY 29 WAS CLR WHEN I MADE MY SECOND PASS. I TURNED DOWNWIND; BASE; AND THEN FINAL; LINED UP TO LAND. THIS WAS THE FIRST TIME I SAW THE TWIN ENG ON THE RWY. HE WAS ALL THE WAY OVER TO THE R SIDE OF THE RWY. I ADDED FUEL TO EXECUTE A GAR AND THE ENG OVER-REVVED TO 3000 RPM AGAIN. I FLEW TO THE R AND LANDED BEHIND THE ACFT. NO ACFT OR PEOPLE WERE EVER IN DANGER FROM MY ACTION. THERE WAS NO WAY FOR ME TO GO AROUND. THE PROP WAS TOO FLAT AND THE ENG WOULD TURN TOO MANY RPM. ONCE ON THE GND; I CALLED THE PROP SHOP AND THEY SENT MECHS OUT TO REPAIR THE GOVERNOR PROB.