As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RH WING UPPER PLANK OPENING FOR 640CT HAS CORROSION AROUND NUT PLATE (C-CHECK) RO 4/16/2020 BLENDED OUT CORROSION AROUND THE OPENING AT PANEL 640CT REF CRJ200 SRM. FOUND TO BE OUT OF LIMITS. RECEIVED NEW REO. COMPLIED WITH ALL STEPS OF REO. BOND CHECK GOOD. SEE CONTINUE CARD FOR DETAILS.