Rockwell Collins is now offering Fans 1/A capability for Bombardier Challenger 604s equipped with Pro Line 4 avionics. The upgrade builds on the twinjet’s current flight management system and control display units, while incorporating a new communications management unit. Fans 1/A capability adds to a growing list of Challenger 604 avionics updates that prepare operators for airspace modernization worldwide. The Fans 1/A upgrade for Challenger 604s will be available from Rockwell Collins in the second half of next year, the company said.