As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAINTENANCE FOUND OIL LEAKING FROM THE RIGHT ENGINE COWLING. INVESTIGATION REVEALED A CRACKED OIL COOLER. OIL COOLER WAS REPLACED. THE REMOVED OIL COOLER WAS INSPECTED AND A CRACK ALONG THE END PLATE WELD SEEM WAS LOCATED. THIS DEFECT IS COMMON WITH THIS PN. OIL COOLER.