What was found
AT APPROXIMATELY 0730Z, THE CREW EXPERIENCED NR 3 ENG LOSS OF OIL QTY FOLLOWED BY LOW OIL PRESS, HIGH ENG TEMP AT FL 330. THEY DECLARED AN EMERGENCY AT 0738Z & AIR RETURNED BACK TO HNL STATION SAFELY AT 0908Z. TROUBLESHOOTING IN PROGRESS. R & R NR 3 ENG GEARBOX IAW AMM 72-63-00. INSPECTED MAIN OIL FILTER, PERFORMED ENG RUN, LEAK CHECK GOOD. MAIN OIL FILTER INSPECTION GOOD, NO DEBRIS NOTED. REQUIRES REPEAT INSPECTION & OIL ANALYSIS AFTER 1ST FLIGHT, 15HRS, 25HRS, 50HRS, 75HRS & 100 HRS FOR MONITOR.