As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER LANDING CREW NOTICE OIL DRIPPING OUT OF NR 1 ENG COWLING DRAIN. ON INVESTIGATION, THE LEAK WAS FOUND COMING FROM DAMAGED FITTING THREADS IN THE OIL PRESS REGULATOR HOUSING PN 3105735-01. HOUSING WAS REPLACED & THE ACFT WAS RETURN TO SERVICE.