As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER DEPARTURE, NR 2 ENGINE OIL TEMP WAS NOT CONTROLLABLE IN AUTO OR MANUAL MODE. ACFT RETURNED TO POINT OF DEPARTURE. NR 2 OIL TEMPERATURE WAS MAINTAINED IN LIMITS BY USING MINIMUM CRUISE SETTINGS. SYSTEM INSPECTED AND FOUND TO BE WITHIN AMM LIMITS, NR 2 OIL COOLER DOOR WAS POSITIONED TO THE TRAIL POSITION. ACFT RETURNED TO SERVICE.