y Visoski <flm <mailto > wrote: =div>leffrey, Europe airspace is requiring to have TCAS 7.1 softwa=e installed by Jan 1st, 2016 for the B727. U=S. Airspace is not required to have TCAS 7.1 until year 2020. Cost for software upgrade to 7.1 TCAS is $60,511 (due to a=e and Mod status of B727 TCAS unit, we