As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, PLACED BOTH ENGINE ANTI-ICE SWITCHES ON , THE ENGINE NR 2 COWL VALVE OPEN LIGHT REMAINED BRIGHT. CLOSED APU BLEED AIR SWITCH OFF & INCREASED THRUST TO 40 PERCENT N1 ON NR 2 ENGINE. COWL VALVE OPEN LIGHT REMAINED ILLUMINATED BRIGHT BLUE AS WELL AS AMBER "TAI" ABOVE N1 INDICATOR. ACFT GROUNDED. REPLACED NR 2 ENGINE COWL TAI VALVE REF AMM TASK 30-21-11-000-801 AND 30-21-11-400-801, OPS TEST PASSED.