As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB RT OIL TEMP WAS RISING TO RED LINE 108 DEGREES. POWER REDUCED AND OIL TEMP FELL TO 104 DEGREES AND STAYED BELOW RED LINE THE REST OF THE FLIGHT. FLIGHT RETURNED TO BASE. RT ENGINE OIL COOLER BY-PASS VALVE WAS REPLACED IN ACCORDANCE WITH AMM TASK 79-21-06. BY-PASS VALVE OUT: S/N 148 AND BY-PASS VALVE IN: S/N 314.