As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SCHEDULED 2C INSPECTION THE RT FLOORBEAM TOP PLATES AT FR 20 AND FR 22 WERE CORRODED AT THE NUT PLATE HOLES. MAINT INSTALLED THE RT FLOORBEAM TOP PLATES AT FR.20 - 22. IAW EMB 135/145 SRM 51-40-02. ALL WORK WAS ACCOMPLISHED AND WILL BE REL. AT COMPLETION OF ALL WORK.