As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3556 - EXIT SIGNS AT FORWARD AND AFT BULKHEAD TURN OFF AND ON UNCOMMANDED. REMOVED AND REPLACED RELAY 12E IAW ATR 72 STANDARD PRACTICES 20-00-00. OPERATIONAL CHECK OF EMERGENCY LIGHTING WAS GOOD. AIRCRAFT RETURNED TO SERVICE. (M)