sentences:  After an initial period of operation, the RTAF elected to replace the aircraft's glass fiber wings with locally-produced aluminium wings, even when the original fiber glass wings proved to endure well in the hot and humid Thailand weather, which was a main concern of the manufacturer.During the 21st century, FanJet Aviation GmbH set about reviving production of the Fantrainer 600, aiming to re-introduce the type under the new name "Fanjet 600".During 2010, the company purchased all documentation related to the design, testing and type certification of the original aircraft, followed by the acquisition of associated tools, spare parts inventory, and the trademarks for Rhein-Flugzeugbau and Vereinigte Flugtechnische Werke.