As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE PREFLIGHT INSPECTION, THE EMERGENCY LIGHTS AT ROWS FOUR AND SIX WERE NOTED TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE EMERGENCY BATTERY PACK IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-51-00. LATER IN THE DAY THE POWER SUPPLY WAS REPLACED PER THE MAINTENANCE MANUAL FOR FAILURE HISTORY REASONS.