Disinvestment-bound Air India has approached aviation regulator DGCA for renewal of its flying permit, expiring in June, amid the government scouting for potential buyer for the loss-making carrier, sources said. A senior official at the disinvestment-bound national carrier said that the Directorate General of Civil Aviation (DGCA) has already renewed the Scheduled Operator Permit (SOP) of Air India's international budget arm Air India Express recently.