As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-09 CHECK CORROSION WAS FOUND ON UPPER SURFACE OF FLOOR SUPPORT FRAME BS 1480, RBL 12. MAINTENANCE BLENDED OUT CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED CORRODED FLOOR SUPPORT FRAME BS 1480, RBL 12; FABRICATED A NEW FLOOR SUPPORT PER DWG 146N5458; INSTALLED REPAIR PART IAW B757-200 SRM 51-40-02, PG. 3.