Hydraulic test benches for ground maintenance of civil and military airplanes and helicopters


Specialist in hydraulics for Aerospace Maintenance and Final Assembly Lines, TMH-ams designs, manufactures and maintains AMS® brand hydraulic test benches and tooling and develop new products under the TMH-ams brand.

 With our test benches, we test your aircraft and equipment under nominal operating conditions by ensuring real-time control and measurement of quantities such as pressure, flow or temperature, in optimal safety conditions.

With nearly 6,500 test benches in service in 85 countries, TMH-ams holds a leading position in the Field of Ground Support Equipment (GSE) and maintenance tooling for civil and military airplanes and helicopters.

Created in year 1945, with long experience with OEM and MROs (Maintenance, Repair, Overhaul), TMH-ams catalog of standard products includes many Ground Support Equipment like hydraulic mules (HPU) certified by OEMs. 

As designer and manufacturer, TMH-ams manages turn key project from specifications provided by the end customer to installation, commission and training on customer place.

Beyond supply of equipment (HPU, Ground Support Equipment or tooling), TMH-ams provides :

  • Service support with on-customer-site assistance,
  • Annual Maintenance contract (AMC),
  • Spare parts,
  • Repair,
  • Retrofit,
  • Obsolescence management.


This “GLOBAL SOLUTION” approach is the heart of the company’s strategy with our customers in France, but also worldwide with technical partnerships providing the necessary local sales and technical supports.

Thanks to its hydraulic expertise in managing many fluids (oil, fuel, coolanol), TMH-ams offers a wide range of products:

  • Hydraulic Power Unit (HPU) for testing flight commands and landing gears
  • Accessories test benches for rotating and non-rotating components, oil and fuel (ATEX)
  • Depollution test stands
  • Tooling:
    • Hydraulic couplings,
    • Filling unit, Etc.

Our activities

OUr references

Our customers and partners are present in France and in more than 80 countries:
airlines, maintenance centers, repair shops, aircraft manufacturers,
equipment manufacturers, armies.

Our latest achievements

Hydraulic test bench MEH4075

This mobile hydraulic test bench is mainly dedicated to the maintenance of helicopters, business jets and medium-sized commercial aircraft. It replaces the aircraft generation and provides the power necessary for the ground tests and checks of the various components of the aircraft (landing gear, door flaps, flight controls, etc.)

Hydraulic test bench TMH 5000

The TMH 5000 bench is designed for use on all types of commercial or military aircraft:

Airbus, Boeing or other, including the A380 – A350 – B787.

It replaces the hydraulic generation of the aircraft and provides the power necessary for testing the various components (landing gear, hatches, flight controls, etc.), as well as for leak detection tests.


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