Complex sentence: On 26 September 2013, NAM Air was officially introduced as a subsidiary of Sriwijaya Air planned on having its first flight on October 2013; a plan later postponed because AOC had not been issued by the Indonesia Ministry of Transportation.
Split into simpler sentences: On 26 September 2013, NAM Air was officially introduced as subsidiary of Sriwijaya Air planned on having its first flight on October 2013. This plan was postponed because AOC had not been issued by the Indonesia Ministry of Transportation.