As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUA - FLT 854 AUA TO PHL. SHORTLY AFTER TAKEOFF, THE LEFT ENGINE OIL PRESSURE DROPPED TO 10 PSI AND HAD A RESPECTIVE DROP IN OIL QUANTITY. THE CREW SHUT DOWN THE LEFT ENGINE AND RETURNED TO FIELD AUA. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ACTION PENDING.