The modular aircraft hydraulic test unit is developed to test the hydraulic equipment on aircrafts (including choppers) and to drive this equipment from outside and on ground. It provides the opportunity to test up to 4000 PSI and 20 GPM and it can perform tests with both the aircraft tank and its own tank.

There are 4 hydraulic blocks in the test unit. These blocks provide control of the pressurized oil in the system. The control of the pressurized oil is provided by the flow control, pressure control and directional control valves in these blocks.