As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK, LOCAL CORROSION WAS FOUND ON THE STA 347 FLOORBEAM UPPER CAP BETWEEN RBL 54.5 AND RBL 68.25. THE CORROSION WAS CENTRALIZED AROUND NUT PLATE SCREW HOLES ON THE FLANGE OF THE INNER CHORD. ALL CORROSION WAS REMOVED BY BLENDING. THE BLENDS WERE REINFORCED USING A REPAIR STRAP OF 0.050€? CRES 301 ½ HARD / STAINLESS STEEL UNDER ENGINEERING AUTHORIZATION B767-53-011246.