As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PITOT HEAT INSULATION, BURN MARKS WERE FOUND ON PITOT PRESSURE LINE. CONDITION RESULTS FROM HAVING PLASTIC LINE CONNECTED TO HEATED PITOT MAST. THE SB CORRECTS THIS BY ADDING PLASTIC SPIRAL WRAP TO LINE AND POWER WIRES AT THE PITOT MAST. THIS PREVENTS PITOT LINE FROM DIRECTLY CONTACTING HOT PARTS OF PITOT MAST, BUT SPIRAL WRAP INSULATION IS MADE OF SAME MATERIAL AS ORIGINAL PITOT LINE AND SUBJECT TO SAME HEAT DAMAGE.