As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LEFT BLEED DUCT RED WARNING MESSAGE IN FLIGHT EN ROUTE FROM CLT TO ABE. CREW DIVERTED TO MDT AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, REMOVED AND REPLACED AILC (ANTI-ICE AND LEAK DETECTION CONTROLLER) AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.