New Delhi, Oct 09 (ANI): Heavy Industries and Public Enterprises Minister, Praful Patel's letter to Defence Minister AK Antony, protesting against the Indian Air Force's decision to not allow public sector units ( PSUs) to participate in a global tender for 56 transport aircraft is backed by political leaders. India has set the ball rolling for another mega defence deal by floating the global tender for over Rs 13,000 crore acquisition of 56 transport aircraft to replace the ageing Avro fleet of the Indian Air Force.