As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1130, BGI-CLT - JUST AFTER TAKEOFF THE FLIGHT CREW RECEIVED AN AVIONICS SMOKE WARNING AND RETURNED TO BGI. MAINTENANCE PERFORMED AN INSPECTION OF THE AVIONICS COMPARTMENTS WITH NO EVIDENCE OF SMOKE NOTED. A SATISFACTORY OPERATIONAL CHECK OF THE EQUIPMENT COOLING WAS ALSO PERFORMED.