As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHAFFING ON THE RIGHT HAND WING INBOARD FLAP PANEL 684GB. (C-CHECK) RO 2/1/2021 REPLACED PANEL 684GB P/N CC670-14178-1 DUE TO OUT OF LIMITS CHAFFING IN REF CRJ900 SRM 57-52-01-101-001-A01. ORDERED AND RECEIVED NEW SERVICEABLE PANEL. SEE CONTINUATION CARD FOR WORK PERFORMED.