As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3533 - CREW REPORTED THE AVIONICS SMOKE DETECTOR LIGHT ILLUMINATED FOR 30 SECONDS IN FLIGHT THEN WENT OUT. AIRCRAFT WAS RETURNED TO DFW. MAINTENANCE FOUND THE AVIONICS SMOKE DETECTOR DIRTY. DETECTOR WAS CLEANED AND AN OPERATIONAL CHECK COMPLIED WITH. NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE. (M)