Modern and complex aircraft like the NATO NH90 Helicopter reduce pilot workload by employing high-tech solutions. A flight control computer interprets pilot commands and ensures that the aircraft performs the commanded maneuvers. Elaborate computers monitor the aircraft systems in flight and only highlight to the flight crew when an exceedance of threshold parameters is registered. This level of complexity imposes new challenges on the training of the ground crews.
It has been common practice that whenever an operator fields a fleet of aircraft, one or more of these aircraft goes to ground crew training. So the operational fleet always comes up with one or more aircraft short. Additionally, flight equipment design focuses on lightweight and is constructed for a limited number of flight hours and exchange cycles. This usually results in considerable demand for spares and repairs on the training side. Being original aircraft equipment, both training and the operational side are competing for the limited spare resources. It is not hard to imagine who gets the available spares.