As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURNED TO DEPARTURE, DUE TO AI WING LEAK 1 EICAS. SECURED WING ANT-ICE VALVE CLOSED IAW AMM TASK 30-11-01-801-A IAW MEL. INSPECTED WING PICCOLO PLUMBING FOR LEAKAGE. REACTIVATED WING ANTI-ICE S/O VALVES IAM 30-11-01-040-801-A. R & R LT WING SLAT NR 4 W513 HARNESS IAW AMM 30-11-02. OPS CHECK GOOD.