What was found
NR 3 ENGINE OIL QUANTITY INDICATING ZERO; WITH OIL PRESSURE FLUCTUATING AND LOW OIL PRESSURE, LIGHT ILLUMINATED. PERFORMED IN-FLIGHT ENGINE SHUTDOWN AT 1920Z. NOTE WINDMILLING OIL PRESSURE 20 PSI TURNED ON START LEVER AT 2020Z AS PER AFM. SERVICED NR 3 ENGINE OIL TANK WITH 17 QUARTS OF 2380 OIL. IDLE RAN NR 3 ENGINE, NO LEAKS NOTED. SERVICED TWO MORE QUARTS AFTER ENGINE SHUTDOWN. ACCOMPLISHED ENGINE RUN CHECK IAW MM 71-00 AND PERFORMED OPS CHECK OF OIL SYSTEM IAW MM 79-00, NO LEAKS NOTED ENGINE OPERATION NORMAL.