As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COWL ANTI-ICE LIGHT ON. ORD PERFORMED OPS CHECK OF ENGINE NR 1 ANTI-ICE SYSTEM, AND FOUND ANTI-ICE VALVE MR30201 TO BE FAULTY. ORD MM REPLACED ANTI-ICE VALVE PER MM30-21-11, AND OPS CHECKED PER MM30-21-00, WITH NO FAULTS FOUND. ANTI-ICE VALVE WAS FAULTY. NO FURTHER FAULTS FOUND.