As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT LAV WATER DRAIN SURROUND STRUCTURE CORRODED BETWEEN FS605 AND 621.00 AND STGR25R TO STGR26R. (C-CHECK) RO 5/16/2020 PERFORMED A MAJOR REPAIR BY REPLACING A DOUBLER BETWEEN FS605 AND 621.00, AND BETWEEN STGR25R TO STGR26R. P/N 601R43216-9 IAW CRJ200 SRM. COMPLETED SKY CARD. COMPLETED AND ATTACHED FORM M-337. NO WEIGHT CHANGE NOTED.