As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ANTI ICE DUCT WARNING MESSAGE WHICH TURNED TO A CAUTION MESSAGE DURING APPROACH. ANTI ICE WAS SELECTED ON WHEN MESSAGE OCCURRED. (FLIGHT 3540 FILED CLOSED)PERFORMED OPERATIONAL TEST OF THE BLEED-AIR LEAK-DETECTION AND WARNING SYSTEM IN REF TO CRJ900 AMM 36-21-00. ALSO PERFORMED SELF CHECK OF AILC. NO CORRELATED MDC MESSAGES. COULD NOT DUPLICATE FAULT. OPS CHK NORMAL ON GROUND