As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE TELESCOPIC DUCT HAS INTERNAL CARBON SEALS/BEARINGS, RINGS. THE CARBON RINGS FRACTURE ALLOWING DEBRIS TO FLOW DOWNSTREAM IN THE WING ANTI-ICING SYSTEM. THE DEBRIS COLLECTS IN THE OTBD PICCOLO TUBE, EVENTUALLY OBSTRUCTING AIRFLOW AROUND THE TEMPERATURE SENSOR, WHICH RESULTED IN AN INTERMITTENT WING A/ICE LO HEAT MESSAGE TO BE DISPLAYED ON EICAS. THE DEBRIS WAS REMOVED AND THE TELESCOPIC DUCT WAS REPLACED. HOURS: 2912, CYC: 936.