What was found
(CAN) AFTER LANDING, WHILE ON TAXI, THE OIL PRESSURE WENT DOWN, THE ENGINE ROLLED BACK AND SHUTDOWN BY ITSELF. THE PILOT CONTINUED TAXIING AND THE FIRE WARNING CAME ON. THE PILOT PULLED THE FIRE HANDLE, BUT DID NOT DISCHARGE BOTTLES, AS THE WARNING LIGHT WENT OUT, POST FLIGHT INSPECTION COWLINGS OFF, SHOWED NO EVIDENCE OF FIRE OUTSIDE OF THE ENGINE, HOWEVER THE FAN WAS FOUND SEIZED AND A PUDDLE OF FUEL WAS OBSERVED ON THE GROUND.