Mitsubishi Heavy Industries Ltd. is reviewing a test flight plan for the SpaceJet small passenger jet under development, the firm's president said Wednesday. The review, partly to see whether the first delivery of the aircraft should be moved back further, reflects delays in the production of test models for obtaining a type certificate, according to Mitsubishi Heavy Industries President Seiji Izumisawa. So far, the planned first delivery of the SpaceJet has been delayed five times, from 2013 to the middle of 2020. "We have not changed" the current schedule, Izumisawa said in an interview with media organizations. The SpaceJet, previously known as the Mitsubishi Regional Jet, is the first Japanese-made small passenger jet developed by Mitsubishi Aircraft Corp., a unit of Mitsubishi Heavy.