As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON AVIONICS BAY CUTOUT INTERCOSTAL LOWER FLANGE BETWEEN 26 L AND 27 L FROM FS 394.00 TO FS 409.00. C-CHECK RO 1/16/2021. BLENDED CORROSION FROM AVIONICS BAY CUTOUT INTERCOSTAL LOWER FLANGE BETWEEN 26 L AND 27 L FROM FS 394.00 TO FS 409.00, REF CRJ 200 SRM 51-21-06. STRUCTURALLY ACCEPTABLE AND COMPLIED WITH ALL STEPS OF REPAIR OF CORRODED AREA, REF REO 601R-53-21-3371 REV - DATE 2020-12-07. PERFORMED PRESSURE CHECK NO DEFECTS NOTED.