What was found
1:30 INTO A 3:30 FLIGHT, NR 1 OIL QTY READ 0. IAW QRH MONITORED TEMP & PRESS FOR THE NEXT 15 MINS, TEMP REMAINED NORMAL, BUT PRESS DROPPED TO 21 WITH AMBER BOX. IAW QRH SHUT THE ENG DOWN USING ENG SHUT DOWN INFLIGHT. COORDINATED & DIVERTED UNEVENTFULLY. R & R THE ENGINE IAW WC71T07011. MAX POWER RUN ACCOMPLISHED, ALL PARAMETERS NORMAL.