As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3568, CREW REPORTED ON PREFLIGHT EMERGENCY LIGHTS ROWS 1-7 ILLUMINATE FOR ONLY FOR 5 SECONDS. NOTED BY GROUND CREW THAT OVERWING LIGHTS WERE ON AT ARRIVAL . COCKPIT SWITCH WAS OFF. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED WITH SERVICEABLE NR 2 EMERGENCY LIGHT BATTERY HOLDER ASSY IAW EMB AMM 33-50-00. AIRCRAFT RETURNED TO SERVICE.