As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5879 DURING CRUISE FLIGHT RECEIVED A LEFT ENGINE OIL PRESSURE WARNING MESSAGE, CREW DECLARED AN EMERGENCY AND DIVERTED TO ATL, AIRCRAFT LANDED SAFELY.PERFORMED OPERATIONAL TEST OF THE ENGINE OIL REPLENISHING SYSTEM, SERVICED ENGINE WITH OIL TO PROPER LEVEL. PERFORMED ENGINE RUNS, DISCREPANCY COULD NOT BE DUPLICATED.