What was found
DURING CRUISE NR 3 ENGINE OIL TEMP WAS BETWEEN 125 & 130 DEG FOR 15 MINUTES. PERFORMED ALT PROCEDURES, RETARDED THROTTLE, DIDN'T HELP. SHUTDOWN NR 3 ENGINE, ENGINE WINDMILLED FOR 45 MIN. OIL PRESSURE STAYED ABOVE 25 PSI. DIVERTED & LANDED AT SJU. MX INSPECTED NR 3 ENGINE & FOUND AN OIL LEAK COMING FROM MAIN OIL FILTER PACKING. ENGINE MAIN OIL FILTER & PACKINGS WERE REMOVED INSPECTED & REPLACED. OIL FILTER INSPECTION REVEALED NO CONTAMINATION NOTED. NR 3 ENGINE WAS RUN AT TAKEOFF POWER FOR 5 MIN, ENGINE OIL TEMP STAYED BELOW 125 DEG. ALL PERAMETERS NORMAL. NO LEAKS NOTED, ALL WORK ACCOMPLISHED IAW BOEING MM CH-71-00 PG 609 & 71-00 PG 212A & AMERIJET ENGINE RUN FORM B-41. AIRCRAFT RETURNED TO SERVICE.