One of ten burners in our Secondary Conversion Plant gets off suddenly. This burner placed at the corner of the furnace. The operating parameters found OK. Will this create a major problem in the tubes? Or if the burner placed at the middle of the furnace the similar problem arises? Is there any chance to solve it in online situation. We suspect that the damage refractory or blockage in the fuel line can cause this problem. Our furnace is box type and ten burners placed in a horizontal line.