As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED A LOSS OF THE NR 1 ENGINE OIL PRESSURE DURING CLIMBOUT, ACCOMPANIED BY AN AMBER EXCEEDENCE MESSAGE, FOLLOWED BY A RED EXCEEDENCE MESSAGE. NO RED WARNING PANEL OIL PRESSURE WARNING OBSERVED. FLIGHT CREW SECURED THE ENGINE IAW QRH PROCEDURES AND RETURNED TO DEPARTURE. MX TROUBLESHOOTING REVEALED A FAULTY NR 1 ENGINE OIL PRESSURE TRANSDUCER. THE TRANSUCER WAS REPLACED AND NO FURTHER ANOMOLIES WERE FOUND.