As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ANTI-DUCT WARNING MESSAGE AT FL250 WHILE IN ICING CONDITIONS. OAT -26° AT THE TIME WITH LIGHT TO MODERATE RIME ICING. EXITING ICING CONDITIONS, RAN QRH AND DIVERTED TO OKC. (FLIGHT 3295)THIS DISCREPANCY WAS TRANSFERRED TO CAMP ITEM 27437244 WITH THE FOLLOWING CORRECTIVE ACTION: PERFORMED WING A/I OPERATIONAL TEST IAW AMM 30-12-00. OPERATIONAL TEST GOOD AT THIS TIME, NO FAULTS PRESENT.