What was found
DURING CRUISE, ECM ADV ENGINE OIL QTY WAS PRESENT, ENGINE OIL QTY WENT DOWN TO 1,5 QTS, ENGINE WAS SHUTDOWN IN FLIGHT IAW AMM 79-21-1-92-2-B, SUB-TASK-79-21-1-2-58-A ITEM 4. DRAIN PLUG IN THE MAIN OIL SUPPLY FILTER AND O-RINGS WERE REPLACED, IAW AMM-71-71-3-B. ENGINE RUN PERFORMED WITH RESULTS SATISFACTORY.