What was found
CREW REPORTED, EMERGENCY LIGHTS CAME ON WHEN SIDE WALL CEILING LIGHTS ARE TURNED ON. MAINTENANCE FOUND GROUND STUD GS8008DC TO BE CORRODED. REBONDED STUD IAW EMB145 33-50-50. AFTER REPAIR FOUND NR 3 BATTERY PACK FOR EMERGENCY LIGHTS POSITION THREE WAS DISCHARGED. MAINTENANCE REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK POSITION NR 3. OPS CHECKED EMERGENCY LIGHTING SYSTEM GOOD IAW EMB145 33-50-04. AIRCRAFT RETURNED TO SERVICE.