As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUSELAGE FRAME IN AFT PIT STATION 1500 UNDER FLOOR STRUCTURE BETWEEN RBL 3" AND 16" RBL HAD EXCESS MATERIAL REMOVED FROM UPPER FLANGE DURING CORROSION CLEAN-UP. SUPPLEMENTAL DATA UPDATE MAJOR REPAIR ACCOMPLISHED. MANUFACTURED AND INSTALLED STRAP.