As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RH FLOOR SILL AT FS350 WAS BADLEY CORRODED. UPON FURTHER EVALUATION, FOUND RT FLOOR SILL FROM BS 349-409 TO BE CORRODED BEYOND LIMITS. REMOVED CORRODED SILL IAW SRM 51-42-06-001-001-A01 AND 51-42-13-001-001-A01. INSTALLED THE NEW RT FLOOR SILL AS REQUIRED IAW SRM 51-42-06-001-001-A01 AND SRM 51-42-13-001-001-A01.