As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO RDU DUE TO NR 2 ENGINE LOW OIL PRESSURE INDICATION. REMOVED AND REPLACED NR 2 ENGINE OIL PRESSURE TRANSMITTER IAW 77-47-01. PERFORMED GROUND RUN OF ENGINE NR 2 AT DIFFERENT POWER SETTINGS. COULD NOT DUPLICATE LOW OIL PRESSURE. REF MDW NRC 14811 FOR WORK PERFORMED.