What was found
GRU - FLT 60 - DURING CLIMB-OUT OF GRU, FLIGHT CREW REPORTED IFSD OF NR 3 ENGINE DUE TO LOW OIL PRESSURE (ZERO). AIRCRAFT RETURNED TO GRU. MCC WAS NOTIFIED. WHILE ON THE GROUND AT GRU, MAINTENANCE CHECKED CHIP DETECTORS AND ADDED 6 GALLONS OF OIL. HIGH POWER RUN-UP WAS PERFORMED AND NO LEAKS FOUND. OIL QUANTITY OK. OIL PRESSURE AND TEMP OK. AIRCRAFT WAS RELEASED FOR FLIGHT. (X)