As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FORWARD CABIN BELOW FLOOR DISTRIBUTION DUCT WAS FOUND TO HAVE (20) CRACKS THAT RANGE FROM 0.187" TO 5.375" IN LENGTH ON THE OUTER DUCT SKIN SURFACE. PERFORM PERMANENT REPAIR IAW CRJ7/9 STRUCTURAL REPAIR MANUAL (SRM). AIRCRAFT ILLUSTRATED PARTS CATALOG (APC) 21-23-44, FIGURE 1, ITEM 5 (REV 70 DATED 8/6/2021 ).