What was found
NR 1 ENGINE OIL QTY LOW, TEMP AND PRESSURE NORMAL. DURING CLIMBOUT FROM MIA TO LIM. PILOTS NOTICED NR 1 ENGINE HAD LOSS OIL QUANTITY WITH TEMP AND PRESSURE NORMAL. CREW FOLLOWED SHUTDOWN PROCEDURES FOR NR 1 ENGINE, DUMPED 27000KGS FUEL, AND RETURNED TO MIA WITH NO FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED DE-OILER DRIVE CARBON SEAL THAT WAS FOUND BROKEN PER PW EM 72-06-61. PERFORMED IDLE RUN GROUND TEST ON NR 3 ENGINE PER AMM 71-02-03. NO LEAKS NOTED AT THIS TIME. NR 3 ENGINE IS ON OIL CONSUMPTION WATCH CURRENTLY WITH A FLIGHT TO BOGATA WITHOUT INCIDENT.