As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING POST FLIGHT INSPECTION, OIL WAS NOTED LEAKING FROM #1 ENGINE. MAINTENANCE FOUND THAT A FITTING WAS LOOSE ON THE ACCESSORY OIL PUMP DRIVE COVER. THE THREADS HAD PULLED OUT FROM THE COVER ALLOWING OIL TO LEAK OUT. (TC# 20190521032)