Boca aircraft accept amx, but c=arge 3.5%,. Seamed to much for additional charge,. Check via mail is fine,=no rush The high dollar item $25,000 was TCAS sys=em AD Mandatory upgrade,. TCAS is Traffic Collision Avoidance Sy=tem,. Keeps aircraft From midair collisions,. EFTA_R1_01632698 EFTA02503735 Imp