As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOR FLIGHT 3637 IT WAS DISCOVERED THAT THE EMERGENCY LIGHTS AT ROW 8-12 AND THE OVERWING EMERGENCY LIGHTS WERE INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE BATTERY POWER SUPPLY AND BATTERY HOLDER ASSEMBLY AT LOCATION NR 3. THE OPERATIONAL CHECK WAS NORMAL IAW AMM 33-50-04 AND WORK CARD 33-700-17. THE AIRCRAFT WAS RETURNED TO SERVICE.