As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5471 - EN ROUTE BOS-JFK RECEIVED A RED ANTI-ICE DUCT WARNING MESSAGE, FLIGHT DIVERTED TO ACY. REMOVED LEFT WING LEADING EDGE FOR INSPECTION OF THE PICCOLO TUBE FOR CRACKS, NO DISCREPANCIES NOTED, RE-INSTALLED AND PERFORMED AN ANTI-ICE OPERATIONAL TEST AND BLEED AIR LEAK DETECTION AND WARNING SYSTEM CHECK. DISCREPANCY COULD NOT BE DUPLICATED BY MAINTENANCE.