As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLT, EN ROUTE CREW REPORTED NR 1 ENGINE ANTI-ICE VALVE CLOSED WOULD NOT OPEN. WAS CHARTER FLIGHT, CREW DIVERTED INTO LAS AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE INTAKE ANTI-ICE VALVE IAW AIRBUS 319/320 AMM 30-21-51 AND AMERICA WEST AIRLINES TASK CARD F1B30301. OPERATIONAL CHECKS WERE NORMAL. DID NOT CONFIRM FAILURE. UNIT WAS INSPECTED, OVERHAULED AND TESTED IAW CMM 30-28-52 REV 1.