As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT NOTICED NR 1 ENGINE OIL TEMPERATURE WAS RISING. REVIEWED E/P FOR HIGH TEMPERATURE. TEMPERATURE CLIMBED INTO THE RED MAX TEMPERATURE 132°. PERFORMED HIGH ENGINE OIL TEMP E/P. CONTACTED COMM CENTER AND INFORMED THEM OF SITUATION. SETUP FOR SINGLE ENGINE LANDING. BROUGHT NR 1 ENGINE BACK TO FLY. OIL TEMPERATURE WAS RISING BUT DID NOT GO RED. LANDED AND SHUTDOWN AIRCRAFT. REPLACED BYPASS VALVE AND PERFORMED GROUND RUN FUNCTION CHECK AND AN IN-FLIGHT OPERATIONAL CHECK. SYSTEM CHECKED GOOD.