As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE BLUE COWL VALVE OPEN LIGHT ON BRIGHT BLUE WITH A FLICKER WITH SWITCH IN ON POSITION. TAI ON UPPER DISPLAY IS GREEN. GROUNDED - YES. REMOVED AND REPLACED NR 1 ENGINE COWL THERMAL ANTI-ICE VALVE. IAW AMM 30-21-11/401. OPERATIONAL CHECK, IAW AMM 30-21-11-400-801 STEP 3I.