As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT THE LT WING A/I, RT WING A/I, & WING A/I SNSR CAUTION MESSAGES ILLUMINATED. THE CREW FOLLOWED THE QRH AND RETURNED TO CLT. MAINTENANCE REMOVED & REPLACED THE LEFT WING OUTBOARD ANTI-ICE SENSOR (MT33). THE WING ANTI-ICE SYSTEM OPERATIONALLY CHECK GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.