As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NUMBER 438. DURING DESCENT RIGHT ENGINE ANTI-ICE SWITCH VALVE LIGHT REMAINED ON, WITH SWITCH IN SELECTED ON POSITION. MAINTENANCE REMOVED AND REPLACED RIGHT ENGINE ANTI-ICE VALVE PER AMM 30-21-03-4. AIRCRAFT RETURNED TO SERVICE.