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In the competitive world of aviation, helicopter operators demand reliable, efficient, and durable ground support equipment (GSE) to keep their fleets mission-ready at all times. The AW139 helicopter—a versatile, multi-mission, twin-engine aircraft—has become a mainstay in operations spanning offshore transport, search and rescue (SAR), VIP/corporate travel, and other critical applications. As such, ensuring top-tier AW139 Ground Support Equipment is essential for operators who seek to maximize uptime, maintain safety, and streamline maintenance procedures.
In this comprehensive guide, we delve into everything you need to know about AW139 hydraulic carts—focusing on Portable Hydraulic Power Units (PHPUs) and specialized AW139 Pressure Test Units—to highlight how they revolutionize helicopter ground support. We will explore key features, technical specifications, compliance standards, best practices, and overall benefits of these solutions. By the end of this article, you will have a thorough understanding of the equipment designed specifically for the AW139 helicopter, why they matter, and how they can enhance your operations in terms of performance, efficiency, and reliability.
Table of Contents
Why Dedicated Ground Support Equipment Is Crucial for the AW139
Diesel-Driven Portable Hydraulic Power Unit (P/N 201357-100)
Electric-Driven Portable Hydraulic Power Unit (P/N 201358-100)
AW139 Pressure Test Unit and AW139 Transmission Hydraulic Test Unit
Maintenance, Training, and Support for AW139 Hydraulic Equipment
1. Introduction to the AW139 Helicopter
The AW139 helicopter, produced by Leonardo (formerly AgustaWestland), is a medium-lift twin-engine aircraft celebrated for its performance, safety features, and versatility. With a spacious cabin, state-of-the-art avionics, and a 15-passenger capacity (in certain configurations), the AW139 fulfills critical missions in:
Offshore Transport: Serving oil and gas operators by transporting personnel to and from offshore rigs and platforms.
Search and Rescue (SAR): Equipped with specialized searchlights, hoists, and advanced avionics to handle urgent rescue missions in harsh conditions.
Corporate and VIP Transport: Offering comfortable interiors for executive travelers, combining speed, safety, and a smooth flight experience.
Law Enforcement and Homeland Security: Providing an agile aerial platform for surveillance, troop transport, and emergency response.
With a global presence, AW139 helicopters operate in diverse climates—from freezing polar environments to scorching desert conditions. Such versatility demands ground support equipment engineered to handle a broad range of environmental challenges while delivering exceptional reliability and ease of use.
2. Why Dedicated Ground Support Equipment Is Crucial for the AW139
Reliability on the ground is just as important as reliability in the air. In today’s high-stakes aviation market, operators cannot afford extended downtime caused by equipment failures or inadequate GSE. Specifically for the AW139 helicopter, properly designed and meticulously manufactured ground support equipment ensures:
Efficient Maintenance Cycles: Maintenance teams can diagnose and address hydraulic system issues quickly, reducing aircraft-on-ground (AOG) times.
Enhanced Safety: Quality equipment reduces the risk of fluid contamination, leaks, or system malfunctions—safeguarding both personnel and aircraft.
Regulatory Compliance: Aviation authorities hold operators to strict standards regarding ground operations; advanced GSE helps meet or exceed those standards.
Lifecycle Cost Savings: Investing in specialized GSE curtails unplanned maintenance events, lowers downtime costs, and extends the overall lifespan of the AW139’s hydraulic systems.
Among the most critical aspects of AW139 maintenance is ensuring consistent hydraulic system performance. Enter AW139 hydraulic carts—portable power units and test units designed to keep your helicopter’s hydraulic systems in peak condition.
3. Overview of AW139 Hydraulic Cart Solutions
Hydraulics International, Inc. (HII) has long been a trusted provider of advanced hydraulic ground support equipment, offering robust solutions tailored to modern commercial and military aircraft. In partnership with AVA AERO—a Middle Eastern aviation support specialist—HII’s Portable Hydraulic Power Units (PHPUs) have become central to efficient AW139 maintenance operations.
Two primary models for the AW139 stand out:
Diesel-Driven Portable Hydraulic Power Unit (P/N 201357-100)
Electric-Driven Portable Hydraulic Power Unit (P/N 201358-100)
Additionally, specialized units like the AW139 Pressure Test Unit and the AW139 Transmission Hydraulic Test Unit are available to support more targeted tasks such as verifying servoactuator performance and ensuring the hydraulic feed lines meet performance specifications.
This guide will explore both the diesel-driven and electric-driven AW139 Hydraulic Power Units, along with the dedicated AW139 Pressure Test Unit offerings, to illustrate their critical role in revolutionizing ground support for one of the most sophisticated helicopters on the market.
4. Diesel-Driven Portable Hydraulic Power Unit (P/N 201357-100)
At the forefront of AW139 ground support, the diesel-driven Portable Hydraulic Power Unit (P/N 201357-100) is engineered for durability, mobility, and high performance—particularly in harsh environments. Below are some of its standout features:
4.1 Dual Hydraulic Supply and Return
This diesel-driven PHPU incorporates two regulated supply and return connections specifically calibrated for the AW139 helicopter. Outfitted with quick-disconnect couplings, it ensures rapid and secure hook-ups, reducing time between maintenance tasks and simplifying the entire ground support process.
4.2 High Flow and Pressure Capability
Flow Rates: Capable of delivering up to 16 GPM at 3000 PSI per system (up to 32 GPM combined) and 11 GPM at 5000 PSI per system (up to 22 GPM combined).
Operational Efficiency: With these flow and pressure capabilities, the AW139’s hydraulic systems can be serviced swiftly, ensuring minimal aircraft downtime.
4.3 Sealed Hydraulic Circuit
A sealed hydraulic circuit keeps both moisture and particulate contaminants at bay. In environments prone to dust or humidity—like desert-based operations—this feature is indispensable. A sealed circuit ensures hydraulic fluid integrity, prolongs component life, and maintains maximum performance.
4.4 Comprehensive Filtration
To protect the delicate components of the AW139 helicopter:
3-Micron Absolute Filter: Purifies hydraulic fluid for the supply and fill systems.
10-Micron Nominal Boost System Filter: Maintains cleanliness in the boost system, safeguarding the entire hydraulic chain.
4.5 Environmental Resilience
With an operating temperature range from -40°F to +120°F and an altitude performance ceiling of 6000 feet, this diesel-powered unit is built to handle extremes—from winter operations in subzero climates to scorching desert conditions typical in the Middle East.
4.6 Mobility and Compact Design
Dimensions: 48” H × 51” W × 97” L
Road Clearance: 8 inches
Tow Speed: 20 mph
Designed for easy transport, the unit’s streamlined size and ground clearance make it highly maneuverable. Additionally, an impressive tow speed capability further expands deployment options, so it can be promptly moved between hangars or on the tarmac.
4.7 Diesel Engine Performance
Powered by a 110 HP turbocharged diesel engine, this PHPU meets EPA emission standards, keeping environmental impact low without compromising on performance. This compliance not only caters to global environmental regulations but also supports an operator’s corporate sustainability goals.
5. Electric-Driven Portable Hydraulic Power Unit (P/N 201358-100)
For operators who seek an emissions-free or low-noise alternative, the electric-driven Portable Hydraulic Power Unit (P/N 201358-100) proves to be an outstanding solution. Here’s why:
5.1 High-Efficiency Electric Motor
Equipped with a 75 HP Open Drip Proof (ODP) motor, the electric-driven PHPU offers the same robust hydraulic performance as its diesel-driven counterpart. It is especially suited for indoor environments where noise and exhaust emissions need to be minimized.
5.2 Comparable Hydraulic Performance
Mirroring the diesel version, the electric-driven model delivers:
16 GPM at 3000 PSI per system (up to 32 GPM combined)
11 GPM at 5000 PSI per system (up to 22 GPM combined)
Operators can confidently choose between diesel or electric based on their specific operational environment without worrying about sacrificing performance.
5.3 Reduced Noise Emissions
Noise-sensitive operations—such as hangars located in densely populated areas or near strict noise regulation zones—benefit immensely from this electric-driven unit’s quieter operation. Maintenance crews can communicate more effectively, improving safety and collaboration.
5.4 Durability and Corrosion Resistance
Constructed with painted steel, the unit is designed to resist corrosion and typical wear and tear. With fewer moving parts in the powertrain compared to a diesel engine, the electric model can also offer longer service intervals and lower lifecycle maintenance costs.
6. AW139 Pressure Test Unit and AW139 Transmission Hydraulic Test Unit
Beyond the Portable Hydraulic Power Units, certain specialized ground support equipment—like the AW139 Pressure Test Unit and the AW139 Transmission Hydraulic Test Unit—are crucial for in-depth diagnostic testing and specific maintenance tasks. These dedicated units are invaluable when it comes to ensuring the AW139’s flight control servoactuators, feed lines, and transmission systems perform flawlessly under pressure.
6.1 AW139 Pressure Test Unit
The AW139 Pressure Test Unit is engineered to perform critical checks on:
Main Rotor Flight Control Servoactuators
Tail Rotor Flight Control Servoactuators
Hydraulic Feed Lines
Dynamic Sealing Performance
By simulating the range of motion and pressure levels the rotor control systems experience in real flight conditions, this specialized test unit allows engineers to pinpoint any anomalies or wear issues early—preventing more significant problems down the line. Operators gain the confidence that every servoactuator and feed line is up to spec before flight.
6.2 AW139 Transmission Hydraulic Test Unit
Similarly, the AW139 Transmission Hydraulic Test Unit focuses on verifying the integrity and performance of the helicopter’s transmission-related hydraulic systems. Proper lubrication and hydraulic pressure are vital for the AW139’s transmission components, ensuring smooth power transfer from the engines to the rotors. This test unit:
Confirms that hydraulic pressures are within manufacturer-recommended thresholds.
Ensures feed lines and lubrication channels are unobstructed and free of contaminants.
Verifies there are no leaks or weak points in the system under operational load conditions.
These specialized units go beyond routine checks, giving operators the data they need to carry out predictive and preventative maintenance. Early detection of issues not only improves safety but also significantly reduces unplanned downtime, saving both time and money.
6.3 Helicopter Fluid Servicing Equipment
Please check our fluid servicing Units. Click Here
6.4 Helicopter Nitrogen and Oxygen Carts
Please check our Nitrogen servicing Units. Click Here
7. Key Advanced Functionalities for AW139 Maintenance
Both the diesel-driven (P/N 201357-100) and electric-driven (P/N 201358-100) AW139 hydraulic carts, as well as the specialized test units, come equipped with advanced features that address the complexities of modern-day helicopter maintenance:
Aircraft Reservoir Service System: Enables the easy filling or draining of the AW139’s hydraulic reservoir through the return lines or an external port. This feature streamlines the process of changing or replenishing hydraulic fluid, reducing spillage and contamination risks.
Heat Management:
Oil-to-Air Radiator-Type Heat Exchangers: Ensure the hydraulic fluid remains within optimal temperature ranges, even in sweltering desert conditions.
Thermal Sensors: Continuously monitor fluid temperature, triggering alarms or system shutdowns if thresholds are exceeded.
Sample Port Integration:
Fluid Health Monitoring: Built-in sample ports allow maintenance teams to obtain fluid samples quickly for lab analysis. Early detection of contamination or degradation can prevent costly system failures.
Fault Detection and Safety Protocols:
Visual Fault Indicators: Beacon lights immediately alert crews to issues like low boost pressure, high system temperatures, or engine malfunctions.
Automatic Shutdown Systems: Protect valuable components (e.g., the diesel engine or electric motor) from severe damage in the event of anomalies.
8. Operational Versatility of AW139 Hydraulic Carts
One of the greatest advantages of these AW139 Hydraulic Power Units is their versatility in different operational scenarios:
Hangar Maintenance: With compact dimensions and maneuverability, the equipment can be positioned effortlessly around an AW139 helicopter in a busy maintenance hangar.
Remote Airfield Operations: Both the diesel and electric versions can be towed and transported easily, ensuring ground crews have immediate hydraulic support even at remote or makeshift landing zones.
Extreme Climates: Whether dealing with the Middle East’s scorching heat, a cold northern climate, or high-altitude operations, the robust design of these PHPUs ensures minimal performance degradation across a wide temperature and altitude range.
Closed-Loop and Open-Loop Operations: The ability to adapt between different reservoir or test stand configurations further cements the AW139 hydraulic carts as an all-in-one solution for helicopter ground support.
9. Compliance and Safety Features for AW139 Ground Support
Strict aviation standards mandate that ground support equipment align with regulatory requirements. When using specialized AW139 hydraulic carts—like those offered by HII and supported by AVA AERO—you benefit from:
EPA Emission Standards: The diesel engine’s compliance ensures environmentally conscious operation and straightforward import/export processes where emission regulations are enforced.
Design Certification and Testing: These units undergo rigorous testing to guarantee that they meet or exceed the demands of AW139’s technical requirements, ensuring both reliability and safety.
Spill Containment Measures: Drip trays, sealed circuits, and fail-safe valves reduce the risk of environmental contamination and align with best practices in hazardous material handling.
A comprehensive approach to compliance and safety not only protects your ground crew and aircraft but also upholds your organization’s reputation in the industry.
10. Maintenance, Training, and Support for AW139 Hydraulic Equipment
Even the best equipment requires proper care. AVA AERO, as a regional partner, provides:
Comprehensive Training Programs: Maintenance personnel receive hands-on instruction on using hydraulic carts, performing pressure tests, and troubleshooting. Well-trained technicians are more efficient, safer, and better equipped to maintain AW139 helicopters to the highest standards.
Spare Parts Availability: Rapid access to replacement filters, seals, hoses, and other key components ensures minimal downtime in the event of a malfunction.
Ongoing Product Support: Customer service teams and field engineers can guide you in diagnosing issues, scheduling preventative maintenance, and implementing best practices.
By integrating these solutions into your existing maintenance infrastructure, you lay the groundwork for a fully optimized AW139 ground support system.
11. Best Practices for Using AW139 Hydraulic Power Units
To maximize the lifespan and efficiency of your AW139 Hydraulic Power Units, consider incorporating the following best practices:
Regular Filter Replacements
Filters, especially the 3-micron and 10-micron variants, are critical for maintaining fluid cleanliness. Regularly scheduled filter replacements prevent contamination and extend component life.
Routine Fluid Analysis
Use the sample ports to periodically check hydraulic fluid quality. If samples show signs of metal particulates, moisture, or chemical breakdown, address the root cause immediately.
Check for Leaks or Loose Connections
Before every operation, perform a visual inspection to confirm that hoses and couplings are properly seated and free of cracks. Catching leaks early prevents larger issues.
Monitor Engine or Motor Health
Diesel-Driven Units: Keep an eye on engine oil levels, coolant levels, and look out for unusual vibrations or sounds.
Electric-Driven Units: Listen for excessive motor noise or check for overheating to spot potential issues.
Adhere to Recommended Tow Speeds
While the units can be towed at up to 20 mph, driving at safe, controlled speeds reduces wear on tires and chassis components, prolonging unit life.
Store Units in Appropriate Conditions
Whenever possible, store hydraulic carts indoors or under cover to protect them from extreme weather. Regular cleaning removes dust, sand, or debris that could negatively affect performance.
By implementing these maintenance and operational best practices, you guarantee safer and more reliable ground support for your AW139 helicopter.
12. Future-Proofing Your AW139 Fleet with High-Performance GSE
With the aviation industry poised for continued growth—particularly in utility and VIP helicopter segments—future-proofing your operations becomes essential. The AW139 remains one of the most sought-after platforms due to its advanced avionics, robust airframe, and versatility. As new technologies emerge and regulations evolve, having reliable, well-supported ground support equipment ensures you can quickly adapt to:
Tighter Emission Regulations: Electric-driven units offer a head start for operators in regions where emissions standards may tighten in the coming years.
Longer Maintenance Intervals: With improved fluid filtration and sample monitoring, hydraulic systems can be maintained less frequently, saving time and reducing costs.
Data-Driven Maintenance: As digital solutions integrate more deeply with physical equipment, advanced sensors on hydraulic carts and test units can feed data to predictive maintenance software, providing real-time insights and alerts.
Staying ahead of these changes ensures your AW139 fleet remains competitive, compliant, and operationally efficient.
13. Conclusion: Elevating AW139 Ground Support Standards
The AW139 helicopter has set a high bar for performance, safety, and versatility in the rotorcraft market. To maintain that standard, specialized ground support equipment—particularly AW139 hydraulic carts like the diesel-driven (P/N 201357-100) and electric-driven (P/N 201358-100) Portable Hydraulic Power Units, along with the AW139 Pressure Test Unit and AW139 Transmission Hydraulic Test Unit—plays a pivotal role. These solutions not only streamline maintenance tasks but also enhance safety, reduce downtime, and protect your aircraft’s hydraulic systems from contamination or premature wear.
By partnering with AVA AERO for deployment, support, and training across the Middle East (and beyond), operators can ensure they have the right tools and expertise to keep their AW139 helicopter fleets in peak condition, no matter the environment. Whether you prioritize lower emissions, less noise, or maximized portability, these high-performance units cater to a range of operational demands.
Key Benefits Recap:
High Flow and Pressure: Accelerate maintenance tasks with up to 16 GPM at 3000 PSI per system.
Advanced Filtration: Maintain fluid cleanliness with 3-micron supply filters and 10-micron boost filters.
Reliability in Extreme Climates: Trusted operation from -40°F to +120°F, up to 6000 feet altitude.
Adaptability and Safety: Seamless integration with AW139 quick-disconnect couplings, back-pressure regulators, beacon fault indicators, and auto-shutdown protocols.
Emission and Noise Control: Diesel-driven model meets EPA standards, and the electric-driven model offers near-silent operation.
As operators continue to look for ways to optimize their helicopter fleets—minimizing costs and maximizing aircraft-on-wing time—investing in the right ground support equipment becomes a crucial piece of the puzzle. For those searching for the ultimate solution for AW139 maintenance and upkeep, these hydraulic carts and test units stand out as industry-leading choices.
Ready to Take the Next Step?
If you’re aiming to elevate your AW139 helicopter ground support capabilities to world-class standards, consider integrating HII’s diesel-driven and electric-driven Portable Hydraulic Power Units, as well as the specialized AW139 Pressure Test Unit and Transmission Hydraulic Test Unit, into your maintenance regimen. Combined with AVA AERO’s regional expertise, you’ll be equipped to handle all aspects of hydraulic maintenance, ensuring the continued success of your AW139 missions—onshore, offshore, and everywhere in between.
About AVA AERO
AVA AERO is a leading aviation support specialist dedicated to delivering top-tier ground support solutions and customer support across the Middle East and beyond. By collaborating with global manufacturers like Hydraulics International, Inc. (HII), AVA AERO provides operators with cutting-edge hydraulic equipment, expert training, spare parts, and 24/7 technical assistance—everything you need to keep your AW139 helicopter in optimal flight-ready condition.
Further Inquiries
If you’re interested in learning more about these AW139 hydraulic power units, or if you have questions about their compatibility with your specific operational environment, reach out to AVA AERO for personalized guidance. Our team of experts will consult with you on the best configuration, whether you prioritize emissions, mobility, or cost-efficiency, and help you streamline your AW139 ground support strategy from day one.
Final Thoughts
In an industry driven by precision, reliability, and speed, specialized AW139 Ground Support Equipment can make a transformative difference in daily operations. The diesel-driven (P/N 201357-100) and electric-driven (P/N 201358-100) Portable Hydraulic Power Units, complemented by the AW139 Pressure Test Unit and AW139 Transmission Hydraulic Test Unit, represent the pinnacle of hydraulic technology tailored for the AW139 helicopter. By choosing equipment that aligns with both current and future regulatory and operational demands, you set your operation on a trajectory for continued success.
Whether you’re a seasoned operator seeking to upgrade your fleet’s ground support capabilities or a new entrant looking to establish a robust maintenance foundation, these solutions offer a dependable path forward. Embrace the next evolution in AW139 maintenance and discover how high-performance hydraulic carts and test units can revolutionize your ground operations—keeping your helicopters safe, efficient, and always ready for the next mission.
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