Héli-Union Industry was initially created to provide technical support services for Héli-Union Oil & Gas activity. Formerly established in Issy-les-Moulineaux, the maintenance activity was then relocated in 1986 to a more spacious hangar in Toussus-le-Noble due to a significant increase in demand. The name Héli-Union Industry was then officialised in 1994. Since then, Héli-Union has gradually developped and expanded, that today, its maintenance hangar reaches the surface area of 5000m² with more than 100 employees. Ever since its creation, Héli-Union has served a significant number of civil, military and government clients, and has successfully gained its reputation as one of the best heavy helicopter maintenance centers in Europe.


Héli-Union proposes maintenance, personalisation, repair and modification of helicopters along with specialised helicopter technical and logistical support for clients from all backgrounds nationally and internationally. With a highly capable engineering staff and an extensive experience in the industry, Héli-Union is able to offer high quality maintenance service such as :

  • Maintenance inspections (G checks) for heavy, medium and light helicopters
  • Equipment installations
  • Design modifications
  • Test bench
  • Avionics helicopter license renewal
  • Aircraft mobilisation
  • Aircraft painting
  • Helicopter parts sales
  • Etc…




Heli-Union’s turnkey solutions covers:






As part of its commitment, Heli-Union incorporates in its offers a 24/7 customer support desk to manage all enquiries, accessible anytime and anywhere.


Base Maintenance


Maintenance aprovals

    • EASA PART 145 Approved Maintenance Organisation
    • FRA 145 French Military Approved Maintenance Organisation
      (Dauphin N, Dauphin Pedro, Panther, Super Puma, Cougar, Caracal and H225)
    • CMR/AMO-0018 Cameroon Civil Aviation Authority Maintenance Agreement Specifications


Since 1994 :

    • More than 230 projects completed
    • More than 44 maintenance contracts awarded
    • More than 24 years of experience supporting the French Government



Line Maintenance

• Line maintenance on customer operating site
• Maintenance troubleshooting support. Maintenance Controle Center team 24.7 on call.
• Mobile repair team deployable world wide for assistance (Airframe and Engine)
• Maintenance project management (New hangar, New base, etc..)
• Technical support with qualified engineers for work orders
• OEM interface and technical support contract
• Special maintenance jobs such as on site aircraft painting, heavy repair and
• HUMS expertise and analysis.





Continuing airworthiness management expertise for AIRBUS, LEONARDO and SIKORSKY helicopters

Partial or Full integrated airworthiness assistance including :
• Definition of the maintenance policy
• Maintenance program / Maintenance schedule building
• Aircraft status
• Line / Base maintenance Work order management
• Configuration management
• SB / ASB / AD analysis
• OEM tech pubs subscription and management
• Reliability program and reporting.



Spares and Logistics

Heli-Union logistics supports include sourcing and storing of more than 130.000 references
of helicopter parts that can be dispatched worldwide, inventory management, 24/7 AOG
support and aircraft mobilisation.
Heli-Union is also the authorised dealer of:





• EASA PART 21 J Alternative Procedures to Design Organisation Approval (APDOA). Design and certify a wide array of modifications certifiable in EASA Airworthiness jurisdiction.
• EASA Part 21 G Production Organisation Approval (POA)
• FRA 21 J French Military Approved Organisation

Through our Part 21 J and G approvals, Heli Union regularly performs radio avionics modifications on our own helicopters. Thus, we also have an experienced team, which includes the flight test pilot (EPNER qualified).


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