What was found
CRP - FLT 3739 - NR 2 ENGINE OIL PRESSURE WENT TO ZERO, LOW OIL PRESSURE LIGHT ON, NO ASSOCIATED MASTER WARNING. SHUT DOWN NR 2 AND RESTARTED PER CREW EMERGENCY PROCEDURE. COULD NOT DUPLICATE REPLACED TRANSMITTER. OPS CHECKED GOOD, AIRCRAFT RETURNED TO SERVICE. (X)