As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STINGER 21L INTERCOSTAL BETWEEN FRAMES FS 319 AND FS 333 HAS EVIDENCE OF CORROSION. C-CHECK RO 11/16/2020. REMOVED CORROSION FROM INTERCOSTAL AT STGR 21L BETWEEN FRAMES AT FS 319-FS 333 AND FOUND REWORKED AREA TO BE OUT OF LIMITS. REPLACED INTERCOSTAL, REF CRJ-700 SRM AND DWG. COMPLIED WITH TASK CARD. LEAK CHECK GOOD.