As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON BOXBEAM FROM STA 1660 TO STA 1680 RBL 54 AT PASSENGER CABIN FLOOR. CORROSION LEVEL 2. BOXBEAM FROM STA 1660 TO STA 1680 RBL 54 AT PASSENGER CABIN FLOOR WAS REPLACED PER B757-300 SRM 51-40-02-0G PAR 7 D. (1617683) AIRCRAFT WAS GROUNDED