What was found
DURING MAINTENANCE INSPECTION FOUND THE LEFT OVERWING EMERGENCY LIGHT INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. FOUND EXTERNAL LEFT OVERWING EMERGENCY LIGHT BULB TO BE MAKING INTERMITTENT CONTACT WITH SOCKET OF LIGHT ASSEMBLY DUE TO ELECTRODE EROSION OF BULB. REMOVED AND REPLACED LIGHT BULB AND CHECKED EMERGENCY LIGHT IAW EMB140 AMM 33-50-10. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.