As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, AT FL 380, IN CLEAR WEATHER. BOTH ENGINE ANTI-ICE CAME ON WITH SELECTOR IN AUTO. TURNED THE ANTI-ICE OFF AND ICING ENGINE EICAS MESSAGE CAME ON. NORMAL OPERATION IAW FIM 30-90-20-00. PERFORMED OPS CHECK IAW AMM 30-81-01, NO DEFECTS NOTED, OPS CHECKED GOOD.