As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON APPRAOCH AT 4000' RECEIVED AN "AVIONICS SMOKE " MESSAGE. SMOKE WAS NOT VERIFIED AND THE FIRE RESCUE CREWS CONFIRMED THERE WAS NO HEAT SIGNATURE ON THE GROUND. T/S PER FIM 26-15-00 FIG 102. FOUND COCKPIT SMOKE DET 13WA BAD. R/R'D SAME CKS GOOD REF MM 26-15-12.