What was found
PIT/SBN - FLT 664 - DURING CRUISE, THE RIGHT ENGINE OIL TEMPERATURE GAUGE CLIMBED INTO THE YELLOW RANGE AND STABILIZED AT 130 DEGREES CELSIUS AFTER TOPPING AT 140 DGREES CELSIUS. AFTER 15 MINUTES WITH THE OIL TEMPERATURE IN THE YELLOW RANGE, THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT DIVERTED TO FWA AND LANDED WITHOUT INCIDENT. THERE 15 MINUTES SINGLE ENGINE TIME. MAINTENANCE REPLACED THE RIGHT ENGINE AIR/FUEL HEATER VALVE. THE RIGHT ENGINE OIL AND OIL FILTER WERE ALSO REPLACED. (X)