HD UK’s MRO facility provides a full range of maintenance and overhaul services for civil and military customers across various aircraft platforms.

Our in-house MRO services range from minor component repairs to full landing gear overhaul as well as test and inspection services for hydraulic actuation, steering control systems and primary flight control systems.

Our HD Runcorn site provides a complete end to end MRO service incorporating

  • Disassembly and cleaning
  • Survey/inspection
  • Non-Destructive Testing
  • Surface treatments (plating), paint and final assembly of products ranging from single piece parts through to complete landing gear assemblies.

HD Runcorn has provided MRO services for over thirty years and continues to support new and legacy products for our civil and military customer both in the UK and overseas.

Respected Global Provider

At the cutting edge of aircraft landing gear development & technology.

Complete End to End Support

From conceptual design to qualification, manufacturing and after-sales service.

Engineering Excellence

Proud to deploy technical expertise and specialist knowledge.

Pro-Active Approach

Continually investing in new technologies, procedures and processes.

APPH Group has been designing and manufacturing aircraft hydraulic systems for many years.

Having grown organically and through acquisition, the company is respected worldwide as a provider of hydraulic systems and landing gears for diverse civil and military markets.

Our Product Services

Engineering Design, Development & Testing

Where ideas originate, innovative solutions explored and systems are tested.


A vital element in the development process at HG UK is the testing of the equipment to verify functional and environmental performance.

Machining Capability

HD UK is a machining Centre of Excellence with extensive CNC capability.

MRO Services

Mechanical, Pneumatical, Hydraulic components, Landing Gears, fuel systems, EMA’s, Electronic Control Units, electric generators and cooling / air conditioning equipment, offering flexible Maintenance solutions for OEM and Non-OEM components.

Processing Capabilities

Ultra-modern processing facilities with wide ranging capability to complement our manufacturing activities.


Fully equipped with the latest technologies to drive our work efficiency.