Introduction

In the world of rotorcraft aviation, reliability isn’t optional—it’s essential. Whether you're managing a firefighting fleet, conducting aerial tours, or operating law enforcement helicopters, engine performance is critical. At the heart of many aircraft across the globe are Safran engine parts, designed to withstand extreme conditions and deliver consistent, powerful output.

At Black Mountain Aviation, located at Boulder City Municipal Airport and certified as an FAA Part 145 Repair Station (LVBR789X), we specialize in the inspection, repair, and replacement of Safran engine parts, Safran modules, and Safran accessories for Arriel-powered aircraft.

What Are Safran Engine Parts?

Safran engine parts refer to the OEM-manufactured components specifically designed for Arriel turbine engines, such as the 1D1, 2B, 2B1, and 2D models. These engines are widely used in Airbus helicopters like the AS350, H125, EC130, and other platforms. Parts include modules, control units, sensors, shafts, valves, and accessories that support combustion, torque transfer, and operational control.

Each part is engineered with precision, tested under strict tolerances, and certified for aviation-grade performance. Using genuine parts from Safran ensures optimal compatibility, longevity, and safety.

Overview of Arriel Engine Safran Modules

One of the most recognized features of the Safran Arriel design is its modular structure. Each engine contains five major Safran modules, which can be individually inspected, serviced, or replaced. These modules simplify repairs and reduce long-term maintenance costs.

Module 1: Axial Compressor

Draws air into the engine and begins the compression process.

Module 2: Gas Generator Turbine

Drives the high-pressure compressor using exhaust gases.

Module 3: Power Turbine

Converts hot gases into mechanical energy to rotate the output shaft.

Module 4: Reduction Gearbox

Reduces turbine speed to usable RPM for the helicopter rotor.

Module 5: Accessories Gearbox

Drives auxiliary systems such as pumps and fuel metering.

Key Safran Engine Parts We Stock

At Black Mountain Aviation, we maintain an inventory of frequently used and hard-to-find Safran parts, including:

• Fuel Control Unit (FCU) – Regulates fuel flow across altitude and load variations.
  
  
• Overspeed Drain Valve – Prevents engine overspeed and ensures safe shutdowns.
  
  
• Start Drain Valve – Supports fuel ignition during cold starts.
  
  
• Free Wheel Shaft Assembly – Enables rotor rotation without engine engagement.
  
  

We also support part numbers like:

• 70BM015420 – Arriel 1D1 Module 1
  
  
• 70BM052000 – Arriel 2B Module 5
  
  
• 0292907680 – 1D1 Free Wheel Shaft Assembly
  
  

Every part is traceable, certified, and installed according to FAA regulations.

The Role of Safran Accessories

While Safran modules and primary parts are critical to engine function, Safran accessories ensure systems like fuel regulation, ignition, monitoring, and cooling work in harmony. Accessories may include:

• Pressure sensors and wiring harnesses
  
  
• Fuel and oil lines
  
  
• Brackets and seals
  
  
• Temperature probes
  
  
• RPM sensors and control actuators
  
  

We stock and install a wide selection of Safran accessories to keep your aircraft’s subsystems in peak operational order.

FAA-Certified Maintenance You Can Trust

At Black Mountain Aviation, our Part 145 Repair Station status allows us to:

• Perform module exchanges and repairs
  
  
• Install and certify Safran engine parts
  
  
• Conduct dynamic balancing of turbines and gearboxes
  
  
• Deliver airworthiness documentation
  
  
• Offer field support for on-site servicing across Nevada and Arizona
  
  

Our team is composed of seasoned A&P mechanics, many of whom are former directors of maintenance, U.S. Forest Service technicians, and OEM-trained specialists.

When Should You Replace Safran Engine Parts?

Some common signs that your aircraft may need Safran engine service include:

• Sluggish starts or no starts
  
  
• Excessive fuel consumption
  
  
• Increased vibration levels
  
  
• Fluctuating RPM or torque
  
  
• Engine fault messages or system alerts
  
  

Routine inspections can detect wear before it results in downtime or safety issues. Our team will review service history, cycle counts, and diagnostic outputs to determine if a Safran module or accessory replacement is needed.

Why Choose OEM Safran Parts Over Aftermarket?

OEM Safran engine parts offer:

• FAA and EASA traceability
  
  
• Manufacturer-backed performance standards
  
  
• Full compatibility with Arriel systems
  
  
• Lower risk of premature failure
  
  

Counterfeit or aftermarket parts may look similar but often fail to meet tolerances, leading to costly repairs or potential grounding.

Our Service Area

We proudly support aircraft owners and operators across:

• Boulder City, NV
  
  
• Las Vegas & Henderson
  
  
• Southern Utah & Arizona
  
  
• Hoover Dam & Lake Mead tour operators
  
  
• Firefighting and law enforcement fleets throughout the Southwest
  
  

With a satellite support team and same-day field deployments, we keep your fleet flying with minimal disruption.



Final Thoughts

When engine performance is the difference between a successful mission and a grounded aircraft, don't leave it to chance. Choose Safran engine parts, Safran modules, and Safran accessories from a trusted FAA-certified provider. Black Mountain Aviation delivers expert service, quick turnaround, and parts you can rely on.