As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AVIONICS SMOKE MASTER WARNING ILLUMINATED FOR 3 TO 5 SECONDS THEN WENT OFF. MAINTENANCE INSPECTED AVIONICS BAY AREA FOR SIGNS OF SMOKE OR BURNING, NONE FOUND. INSPECTED CANNON PLUGS ON DETECTOR ALL CHECKS GOOD. RERACKED WEU FOR TROUBLESHOOTING PURPOSES. ALL OPS CHECKS GOOD.