As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHAFE IN EXTERNAL FUSELAGE SKIN FWD OF CIRCUMFERENTIAL JOINT AT FS 977 AND STGR 27. C-CHECK RO 9/27/2020. BLENDED OUT CHAFE, FOUND TO BE OUT OF LIMITS, REQUESTED ENGINEERING. COMPLIED WITH MHIRJ REO. RESTORED FINISH IAW CRJ700 SRM. ALL STEPS OF THE REO COMPLIED WITH.