Rockwell Collins and Duncan Aviation are collaborating on another Duncan glass box avionics modification program, upgrading the Rockwell Collins Pro Line 4 system in the Falcon 2000 and 50EX to the Pro Line 21 system. The upgrade replaces the original Pro Line 4 7.25-inch CRT screens with 8- by 10-inch Pro Line 21 LCDs that can display features like JeppView maps and charts, XM weather and enhanced vision. Other Pro Line 4-equipped jets will also be candidates for the Pro Line 21 upgrade, according to Rockwell Collins. The first upgrade is set to take place in mid-2008.