As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE ANTI-ICE SWITCH LIGHT REMAINED "BRIGHT" AFTER SELECTING IT ON. NR 1 ENGINE TAI WAS AMBER ALSO ON ENGINE DISPLAY. AFTER 5 MINUTES WITH THE SWITCH ON, THE LIGHT WENT DIM AND THE TAI MESSAGE TURNED GREEN. GROUNDED - YES. REMOVED AND REPLACED NR 1 ENG INLET COWL THERMAL ANTI-ICE VALVE OPS CHECK NORMAL IAW AMM 30-21-11.