What was found
AT 100 KNOTS ANTI - ICE DUCT WARNING MESSAGE APPEARED. REJECTED TAKEOFF WAS PERFORMED. QRH COMPLETED TAXIED BACK TO GATE. (FLIGHT 5053 - FILED CLOSED) ATTEMPTED TO PREFORMED TROUBLESHOOTING WITH FIM 36-20-00. COULD NOT DUPLICATED ANTI-ICE DUCT WARNING DURING OPERATIONAL CHECKS. REF AMM 30-12-00. PERFORMED MULTIPLE HIGH POWER RUNS WITH ALL ANTI-ICE SYSTEMS ON AND COULD NOT DUPLICATE FAULT AT THIS TIME. TAPPED LEADING EDGE AND SHOOK WING WITH ANTI-ICE SYSTEMS ON WITH NO WARNING MESSAGES. TAXIED FOR EXTENDED PERIODS OF TIME WITH NO DISCREPANCIES NOTED WITH ANTI-ICE SYSTEMS ON. SWAPPED CANNON PLUGS BETWEEN BLCU #1 AND #2 WITH NO DEFECTS NOTED. INSTALLED CANNON PLUGS BACK TO ORIGINAL POSITIONS FOR BLCU #1 AND #2. REF AMM 36-21-10. OPS CHECK GOOD. PERFORMED BLEED AIR DETECTION WARNING TEST. REF 36-21-00. OPS CHECK GOOD AT THIS TIME. NO 10 DAY EAML HISTORY NOTED.