As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A 100-HOUR PYLON INSPECTION, THE OIL FILTER TO NR 12 STRUT OIL LINE ASSEMBLY WAS FOUND CHAFING AGAINST THE 4 BOLT HEADS THAT SECURE THE APRON FRAME SUPPORT TO THE ENGINE. ONE CHAFE HAD BEGUN TO SEEP. THE OIL LINE IS FLATTENED OUT IN THIS AREA TO PROVIDE CLEARANCE. THE NEW LINE, WHEN INSTALLED, FIT WITH PLENTY OF CLEARANCE.