As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON L2 LOWER SILL INTERCOSTAL BTW STA 720/740 AND 63 LBL PASSENGER CABIN (W2) LOG-PAGE UPDATED SUMMARY OF NRC 00359 CORROSION LEVEL 2 LOWER SILL BTW STA 720/ 740, 63 LBL WAS REPLACED PER B757-200 SRM 51-40-02-0G PAR 4 AND 7 (1499637)