The Engineering Centre of Excellence at HD UK is at the core of the business, deploying technical expertise and specialist knowledge to design and develop world class landing gear solutions for our ever-growing customer base.

The team, who are co-located across two sites in Runcorn and Montreal, have developed solutions for both rotary and fixed wing platforms across the civil and military sectors, ensuring that the highest standards of customer satisfaction are met.

Central to our business is our ability to develop innovative and practical design solutions in response to challenging customer/regulatory requirements, against a background of emerging technologies, which ensure the solutions meet the global needs of tomorrow.

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.