As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FR81 INNER AND OUTER SURFACES APPROX. 4 IN FROM STRINGER 19L TOWARD RT (INTERCOASTAL LOWER FR80-81) AT AFT EQUIPMENT COMPARTMENT DOOR CUTOUT SURROUND STRUCTURE (MARKED). REMOVED AND REPLACED FRAME AT FR 81 BETWEEN STRINGER 17R TO STRINGER 18L PER A220 ASRP BD500-A-J51-42-07-00AAA-078A-A AND BOMBARDIER DWG C01401201 REV R. (LP# 1631432; AIRCRAFT WAS GROUNDED)