As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE INVESTIGATING NR 1 ENGINE OIL LEAK, IT WAS NOTED THAT THE OIL PUMP DISCHARGE LOWER TRANSFER TUBE HAD WORN A GROOVE IN THE ENGINE CASE, WORN AREA IS MAX .005" DEEP BY .150" AND 1.750" IN CIRCUMFERENCE. O-RING, PN AS3209-126 WAS FOUND TWISTED AND DAMAGED. BECAUSE MFG DID NOT HAVE A PUBLISHED REPAIR FOR THE ENGINE OIL CASE PORT THE NR 1 ENGINE WAS REPLACED IAW TC DH4-71-00-00-FN-801-LH.