As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, ENGINE ANTI-ICE TURNED ON. COWL VALVE OPEN LIGHT REMAINED ON. AMBER TAI ON ENGINE DISPLAY INDICATING ANTI-ICE VALVE FAILED CLOSED. CONFIRMED WITH FLIGHT CREW NR 2 ENGINE WAS THE ISSUE. ACFT GROUNDED. REPLACED NR 2 ENGINE INLET COWL ANTI-ICE VALVE, REF AMM 30-21-11. OPS NORMAL.