As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE -ANTI-ICE HAD BRIGHT BLUE COWL VALVE LIGHT AND AMBER TAI INDICATION WHEN SELECTED ON IN ICING CONDITIONS WOULD NOT EXTINGUISH. REF MEL 30-3C ENG 2 NOSE COWL ANTI ICE VALVE INOP. GROUNDED - YES. REMOVED & REPLACED #2 ENG ANTI ICE VALVE IAW B737-800 AMM 30-21-11.