As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING INSPECTION OIL WAS NOTICED TO BE LEAKING, THE SOURCE OF WHICH WAS DETERMINED TO BE THE OIL COOLER AS THERE WAS A CRACK ON THE WELD ALONG THE UPPER OUTER CORNER OF THE OIL COOLER. THE OIL COOLER WAS REPLACED WITH AN OVERHAULED UNIT.