A 73-year-old woman suffered from ruptured aortic arch aneurysm into mediastinum. The patient was treated by thoracic endovascular aortic repair with the double-chimney graft technique. Three days later, computed tomography (CT) revealed type 1a endoleak (EL) between the chimney grafts. Ten days later, the patient was treated by coil embolization of the aneurysm from the left subclavian artery. The patient recovered, and was without aortic aneurysm events during six months of follow up.