As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L BLEED DUCT CAUTION FOLLOWED BY WARNING MSG / FOUND INSULATION CUFFS TO BE BURNED THROUGH AND TORN FOR BOTH L/H HOT AIR SHUTOFF VALVE AND L/H MODULATING AND SHUTOFF VALVE. REMOVED AND REINSTALLED THE INSULATION CUFFS IAW CRJ 700 AMM 21-61-08-000/400-801 AND CRJ 700 AMM 30-12-02-000-801. PERFORMED LEAK CHECK OF THE L/H BLEED AIR DISTRIBUTION SYSTEM. LEAK CHECK IS GOOD.