As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DESCENT, THE CREW NOTICED THAT THE LT INBD SLAT WAS NOT SHEDDING ICE. THE ANTI-ICE FLEX HOSE FOR THE LT INBD SLAT WAS REMOVED AND THE INNER LINING WAS FOUND TO BE DE-LAMINATED, RESTRICTING FLOW TO THE SLAT. UPON FURTHER INSPECTION, THE LEFT OTBD SLAT HOSE WAS FOUND DE-LAMINATED AS WELL. BOTH HOSES WERE REPLACED WITH NEW.