As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DESCENT, THE LEFT ENGINE ANTI-ICE ANNUNCIATION WOULD NOT EXTINGUISH WITHIN 2 MINUTES AFTER SELECTED PER OPERATING MANUAL. TWO CONTACTS OF TEMP LO SWITCH P/N S105 WHICH ARE ON INSIDE OF THE LEFT HEATED LEADING EDGE WERE FOUND SHORTING ACROSS AN ALUMINUM PNEUMATIC AIR DELIVER TUBE. SHORT WAS PROVIDING A CONSTANT GROUND TO KEEP LIGHT ON.