Sandiaga Uno, chief of shareholder PT Saratoga Investama Sedaya, attends an interview at his office in Jakarta April 5, 2013. Indonesian airline PT Mandala Airlines aims to buy 18 Airbus A320 planes worth $1.6 billion by 2014, in an effort to capture growing middle class travel in Southeast Asia's largest economy, a shareholder said on Friday. REUTERS/Beawiharta (INDONESIA - Tags: BUSINESS TRANSPORT)