iJACK (Patented) is a 3D-gyroscope level placed on the aircraft fuselage that sends electrical signals to some visual indicators (one per jack), showing to each hydraulic tripod jack operator the level status of the aircraft and guiding him indicating when each jack needs to be operated . With this device, the aircraft leveling during jacking is continuously monitored, controlled and secured on the maintenance manual mandatory level range. iJACK is universally compatible with all existing and future aircrafts and hydraulic jacks. The added value of this product is based on its simplicity but huge safety and productivity improvements during jacking or weighing & balance operations for MRO. Additional software and integration with laptop / tablets / smartphones is possible for IT data management and recording.