As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM MHT RECEIVED ANTI-ICE DUCT WARNING MSG. PERFORMED QRH, SYSTEM OFF, MSG CLEARED. ACFT RETURNED TO MHT LANDED SAFELY. INSPECTED 14TH STAGE BLEED AIR SYSTEM, AND PERFORMED OPERATIONAL TEST OF WING ANTI-ICE SYSTEM. NO DEFECTS NOTED.