As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TROUBLESHOOTING OF POSSIBLE OIL LEAK ON NR 1 ENGINE, MAINTENANCE FOUND OIL LINE FROM HEAT EXCHANGER TO LUBE SCAVENGE PUMP DEEPLY CHAFED ON FLANGE OF A AND B SUMP SUPPLY LINE. LINE REPLACED. A AND B SUMP SUPPLY LINE REPOSITIONED AND ADDITIONAL CLAMPING INSTALLED.