New Delhi, Dec. 20 -- The Delhi high court on Friday sought the customs department's response in IndiGo's petition seeking a refund of over Rs.900 crore in customs duty paid on aircraft engines and parts re-imported into India after being repaired abroad, even as the department termed the petition "premature". The department's lawyer, Anuraj Ojha, told a bench comprising justices V Kameshwar Rao and Vinod Kumar that the airline could not seek a refund unless the bills of entry were reassessed. However, the airline's lawyer, V Lakshmikumaran, said that the airline had paid basic customs duty without dispute when its aircraft engines and parts were re-imported after repairs. Additionally, because the repair activity amounted to a service, it ...