X-Plane Children's Air Ambulance Bell 222UT 1.0. This is a Children's Air Ambulance livery for the Cowan Simulation Bell 222UT. The Children's Air Ambulance (TCAA) is an air ambulance charity that transfers critically ill children from local hospitals to specialist paediatric centres throughout Great Britain. The real aircraft used is an Agusta Westland AW169, but I used the Bell 222UT. Simply unzip and place the newly created folder into the liveries section of the aircraft. By Paul Mort.