As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION AT REAR BARREL FLOOR EDGE SUPPORT AT FR 76 RBL 49 WL 147 . REMOVED AND REPLACED SILL FLOOR WEB AT STA FR76 RBL 49 WL 147 PER A220 ASRP BD500-A-J51-42-20-00AAA-078A-A AND BOMBARDIER DWG C01342700 REV:-T. (LP# 1648146; AIRCRAFT WAS GROUNDED)