As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON CABIN FLOOR STRUCTURE SUPPORT P/N 601R38672-1 AT FS349.0 AND RBL19.0 TO RBL21. REMOVED CORROSION BY BLENDING CABIN FLOOR STRUCTURE SUPPORT. PERFORMED HFEC WITH NO INDICATIONS. RESTORED SURFACE PROTECTIVE FINISH. ALL WORK WITHIN LIMITS PERFORMED IAW ASAP EA CRJ253-01940 REV A,