As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE OIL COOLER LEAKAGE FOUND DURING DAILY INSPECTION PRIOR TO FLIGHT. COOLER REPLACED WITH A SERVICEABLE UNIT FROM ANOTHER ENGINE. COOLERS ARE BEING REPAIRED/REBUILT BY PACIFIC OIL COOLERS OF LA VERNE, CA, CERTIFICATE # RF3R813L.