As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLEANING AND PREPPING FOR THE AVDEC MOD CORROSION WAS DISCOVERED ON THE RBL 9 FLOORBEAM FROM FS 559+64 TO FS 559+80 ON THE O/B SIDE (C-CHECK) RO:3/26/2020REMOVED AND REPLACED FLOOR BEAM AT RBL 9 FS 559+64 TO 559+80 IAW CRJ200 SRM.