As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRAME FS 605 IS CORRODED BETWEEN STR 24L AND 27. C-CHECK RO 10/13/2020. BLENDED OUT CORROSION ON FS 605.00 FRAME FROM STGR 27 TO 24L, REF CRJ200 SRM. FOUND TO BE OUT OF LIMITS. REMOVED AND INSTALLED NEW LOWER FRAME SECTOR AT FS 605 FROM STR 20L TO STR 20R, REF CRJ 200 SRM DWG REO. PRESSURE CHECKS GOOD.