As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO COMPARTMENT AIR DISTRIBUTION DUCT WAS FOUND TO HAVE TEAR DAMAGE AFFECTING THE INSULATION BLANKET. PERFORMED PERMANENT REPAIR JAW CRJ 700/900 AMM 25-80-00-340-803, "REPAIR THE INSULATION BLANKET (BA6XX -457XX), EA 20-2021-169.