As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN WING-ANTI ICE SWITCH MOVED TO "ON " IN FLIGHT DESCENDING OUT OF 8000FTMASTER CAUTION /ANTI-ICE ILLUMINATED FOR THE "L -VALVE " WE DID NOT RUN QRH AS WE EXITED ICING CONDITION APPROX 20 SECONDS AFTER THE L-VALVE LIGHT ILLUMINATED ABD SWITCHED THE WING ANTI-ICE BACKOFF. GROUNDED - YES. ACCOMPLISHED WING -ANTI-ICE VLV CHECK , NO FAULTS OR DEFECTS NOTED. REF 30-11-00.