As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT INSPECTION PILOT FOUND SIGNS OF AN OIL LEAK. THE MAINTENANCE TECHNICIAN FOUND OIL LEAK ON OIL COOLER. PERFORMED PRESSURE CHECK ON OIL COOLER AND FOUND BOTTOM FLANGE CRACKED. THIS IS A WEAK ARA ON THE OIL COOLER. RECOMMEND FINDING A REPLACEMENT THAT IS MORE DURABLE.