As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT FS 409.00+128 TO 559 UPPER FLOOR SILL HAVE NUMEROUS AREAS OF CORROSION AS MARKED. C-CHECK RO 9/12/2020. BLENDED 18 EA LOCATIONS ON THE RT FS 409+128-FS 559 UPPER FLOOR SILL WITHIN LIMITS, REF CRJ200 SRM REO. RESTORED FINISH, NO DEFECTS NOTED. COMPLIED WITH TASK CARD.