Repair, maintenance and servicing of unmanned aerial vehicles and air transportation vehicles; repair, maintenance and servicing of unmanned aerial vehicles and air transportation vehicles components parts, namely, flight controlling parts, sensors, remote ground control terminals; repair, maintenance and servicing of data links comprised of ground control terminals and airborne data terminals that allow the unmanned aerial vehicle to be controlled by the ground operators and further allow data to be transmitted from the unmanned aerial vehicle to the ground operators; repair, maintenance and servicing of training simulators, namely, hardware components to simulate unmanned aerial vehicle flight; maintenance and repair of ground support equipment for aircraft and unmanned aerial vehicles