Go Airlines, which now has renamed itself as 'Go First', has filed preliminary papers for a Rs 3,600 crore initial share sale. This Wadia group-backed budget carrier has been operational for 15 years, and the proceeds from the Initial Public Offer (IPO) will be used to pay off debt. According to the draft red herring prospectus, the airline is looking to collect up to Rs 3,600 crore through the selling of shares (DRHP).