Aircraft Accessory Test Bench

The Aircraft Accessory Test Bench (HID-300 Series) is a versatile, state-of-the-art hydraulic testing system manufactured by Hydraulics International, Inc. (HII). Designed specifically for aviation maintenance, repair, and overhaul (MRO) facilities, this test bench is engineered to thoroughly evaluate and certify a wide variety of aircraft hydraulic components, accessories, and subsystems. These include pumps, actuators, valves, hydraulic motors, accumulators, servo controls, and other critical hydraulic accessories used extensively across commercial, military, and general aviation platforms.

Technically, the HID-300 Series test bench provides precise control and consistent delivery of hydraulic fluid pressures, typically ranging up to 5,000 PSI, ensuring compatibility with the demanding requirements of modern aircraft hydraulic systems. It also supports variable flow rates, adjustable according to the specific testing criteria for each hydraulic component, enabling detailed performance assessments that accurately simulate real-world operational conditions.

This test bench is driven by an efficient electric motor, offering numerous advantages over traditional diesel-powered systems, including significantly reduced noise, zero emissions, improved operational safety in enclosed environments, and simplified maintenance. The electric motor is complemented by advanced hydraulic pumps and proportional control valves that provide accurate and responsive adjustments of pressure and flow rates during testing procedures.

The HID-300 test bench includes an integrated dual-stage hydraulic filtration system, which effectively removes contaminants down to 2-3 microns on the high-pressure side and approximately 25 microns on the low-pressure return side. This robust filtration ensures superior cleanliness levels in hydraulic fluid, safeguarding sensitive hydraulic components from damage and extending component life.

Advanced instrumentation and control capabilities form the core of the HID-300 Series test bench, with precise digital pressure gauges, flow meters, temperature sensors, and contamination detection systems. Its built-in data acquisition system records critical operational data such as pressures, flow rates, temperatures, leakage rates, and other performance indicators. Operators benefit from the user-friendly Human-Machine Interface (HMI) integrated with a Programmable Logic Controller (PLC), facilitating easy configuration of test procedures, detailed data analysis, and automated testing sequences.

Safety features are integral to the design, including automatic pressure relief valves, emergency shutoff controls, temperature and pressure alarms, and secure interlocks. These ensure both operator safety and protection for the tested components.

Built with durability in mind, the HID-300 Series Test Bench features robust industrial-grade materials designed to withstand the harsh conditions typically encountered in aviation maintenance environments. Its ergonomic layout allows for easy component installation, testing, maintenance access, and system calibration, significantly enhancing operational efficiency and minimizing downtime.

Applications of this test bench are diverse and include the routine maintenance and overhaul of hydraulic actuators, pumps, valves, and other critical hydraulic accessories. Additionally, it supports quality assurance processes within manufacturing environments, ensures compliance with aviation safety standards, and facilitates research and development activities for new hydraulic systems and technologies.

Technical Specifications Table: