As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING OVERHEAT WARNING MESSAGE IN FLIGHT, COMPLIES WITH QRH, MESSAGE EXTINGUISHED FOR A FEW MINUTES AND THEN CAME BACK. ACFT RETURNED TO DEPARTURE. EMERGENCY DECLARED. COMPLIED WITH FIM 30-12-00 AND AMM 30-12-00, OPS CHECKED GOOD, NO DEFECTS NOTED.