As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL BTW BS 1520 TO BS 1540 AND STRINGERS 30/29RH AT AFT CARGO COMPARTMENT. CORROSION LEVEL 2, INTERCOSTAL BTW BS 1520 TO BS 1540 AND STRINGERS 30/29RH AT AFT CARGO COMPARTMENT WAS REPLACED PER B757-300 SRM 51-40-02-0G AND MANUFACTURE PER DWG: 146N8401 REV: -. UNDER NRC 00497. (1643883) AIRCRAFT WAS GROUNDED