What was found
FLT 1770 GYE-JFK (DIVERTED TO MCO)(ETOPS) DURING CRUISE AT FL 350 NR 1 ENGINE OIL QTY SLOWLY STARTED TO DROP LINEARLY. BEGAN CHECKLIST AND OIL PRESSURE AND TEMP REMAINED NORMALAND CONSTANT AT 160 PSI AND 95 C. OIL QTY CONTINUED TO DROP UNTIL ABOUT 2 QTS. OILPRESSURE THEN BEGAN TO DROP LINEARLY. AFTER APPROXIMATELY SAME TIME OIL PRESSURE CONTINUEDTO DROP INTO YELLOW CAUTION RANGE. ENG NR 1 OIL PR AND ENG NR 1 HIGH VIBRATION ECAMS FOLLOWED.ENGINE WAS SHUTDOWN PER QRH. HIGHEST VIBRATION READING WAS 6.5 ; REF WO 1505789 ENG NR 1 R & R. A/C OK FOR SERVICE.