As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT REACHED CRUISING ALTITUDE OF FL270, PILOT NOTICED RT ENGINE OIL TEMP INDICATION REACHING RED LINE, AND OIL PRESSURE STARTING TO DECREASE. PILOT REDUCED POWER ON RT ENG AND FEATHERED AFFECTED ENG, HE THEN RETURNED TO BASE AND HAD AN UNEVENTFUL LANDING. SYS TROUBLESHOT AND FOUND THE RT OIL COOLER TEMP CONTROL PN 723747 AT FAULT. THIS PART WAS REPLACED WITH NEW. TEST FLIGHT WAS CARRIED OUT AND THE RT OIL TEMP REMAINED IN THE NORMAL RANGE FOR THE DURATION OF THE FLIGHT.