As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF WITH POWER SET, ANTI-ICE MASTER CAUTION ILLUMINATED. AFTER A FEW SECONDS THE LIGHT EXTINGUISHED. APPEARED TO BE AN ENGINE ANTI-ICE MASTER CAUTION. GROUNDED - YES. DUE TO HISTORY ON THE #1 ENGINE ANTI-ICE, REMOVED AND REPLACED THE #1 ENGINE ANTI-ICE VALVE. REF B737-9 AMM 30-21-11.