As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOTS NOTICED OIL PRESSURE DECREASING DURING CRUISE AND SHUTDOWN ENGINE AND LANDED AT NEAREST AIRPORT. MAINTENANCE DISCOVERED OIL UNDERNEATH THE PLANE IN THE GEAR WELL AREA AND THE OIL LEVEL WAS LOW AS WELL. GROUND RUNS INDICATED THAT THE OIL COOLER WAS LEAKING. OIL COOLER WAS REPLACED AND OPS CHECKED NORMAL AND THE AIRCRAFT WAS RETURNED TO SERVICE.