As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW: SHORTLY AFTER DEPARTURE ON AN EMPTY LEG, HAD A LEFT HAND LOW OIL PRESSURE INDICATION WITH NO ASSOCIATED MASTER WARNING. AFTER RUNNING THE CHECKLISTS WE RETURNED TO XXXX, WITH THE ENGINE IN THE IDLE POSITION. NO OTHER ISSUES. MAINTENANCE: OIL PX TRANSDUCER REPLACED. OIL PX ANNUNCIATION SWITCH NOT ACTIVATED CONFIRMING THIS WAS ONLY A INDICATION ISSUE. (TC# 20190301008)