As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON LOWER SILL FROM STA 1380 TO 1440 BTW S-27R AT AFT CARGO COMP (C2) (ACP 0600-164-01Z). SUMMARY OF NRC 00196 CORROSION LEVEL 2: LOWER SILL (SIDE PANEL) FROM STA 1380 TO 1440 WAS REPLACED PER B757-200 SRM 51-40-02 PAR 4 AND PAR 7.