Nextant Aerospace, which specialises in remanufacturing business jet aircraft, has completed the first tranche of a programme to reman its Challenger 604XT model. The remanufactured models feature a Rockwell Collins ProLine Fusion flightdeck in place of the legacy model’s ProLine 4 suite. Nextant executive Mark O’Donnell said: “The initial system integration went very well and the fact we have now entered the flight test segment of our certification effort is a testament to the great work and collaboration that has taken place between the teams at Nextant and Rockwell Collins. ”Nextant’s first remanufactured aircraft, the 400XTi, has sold 70 units in 13 countries. The US firm, based in Cleveland, Ohio, merged this year with Air Services as part of the Constant Aviation portfolio of companies.