sentences:  The second prototype crashed on 7 September 1978, which resulted in the first prototype being modified to Fantrainer 400 standard, being furnished with an Allison engine and revised air intakes.The Fantrainer was evaluated by the "Luftwaffe" against the Beechcraft T-34C and Pilatus PC-7 turboprop powered trainers, but although it was considered to be the most suitable of the three aircraft, being cheaper both to purchase (at DM 1 million per aircraft) and to operate, no orders resulted as it was decided that the Piaggio P.149 was still adequate for the "Luftwaffe"s needs.Despite failing to secure an order from the "Luftwaffe", during May 1982, RFB announced that it was set to commence mass production of the Fantrainer within the next few months.