As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOW OIL PRESSURE AFTER TAKEOFF, COMPLETED QRH PROCEDURE, PRECAUTIONARY ENGINE SHUTDOWN. (FLT 3051) FO: 09/24/2018 CLOSED. REMOVED THE LT ENG ATS AND FOUND NEITHER OF THE 2 ORINGS INSTALLED ON THE SPLINE GEAR SHAFT OR THE MOUNTING FLANGE. REMOVED AND REPLACED LT ENGINE LUBE FILTER IAW AMM. NO METAL SHAVINGS FOUND IN OIL FILTER OR DRAINED OIL. PERFORMED LEAK CHECK OF LT ENGINE - NO LEAKS DETECTED.