As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE WING ANTI-ICE VALVE WOULD NOT CLOSE IN FLIGHT. THE BASE MAINTENANCE TEAM TROUBLESHOT AND DETERMINED THE WING ANTI-ICE VALVE HAD FAILED. THE DEFECTIVE VALVE WAS REMOVED AND AN OVERHAULED VALVE INSTALLED. OPS CHECKS AND LEAK CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS THEN RETURNED TO SERVICE.