As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION LEVEL 2 ON FLOOR STRUCTURE AT APPROXIMATELY STATION 1365 AND RBL 65 JUST INSIDE THE AFT SERVICE DOOR. REMOVED DAMAGED FLOOR WEB SILL FROM PASSENGER COMPARTMENT RBL 65 AND BTW FR-76 TO FR-79 AND REPLACED PER A220 ASRP BD500-A-J51-42-06-00AAA-078A-A AND BOMBARDIER DWG # PL C01342700 REV - T. (LP 1768018 - AIRCRAFT WAS GROUNDED)