What Are Safran Modules?
Safran modules are the building blocks of Arriel engines, commonly found in aircraft such as the Airbus H125, AS350 B2/B3, and EC130 models. These modules are engineered for modular servicing, meaning each section of the engine can be inspected, serviced, or replaced without needing to overhaul the entire engine.
Here’s a breakdown of the five primary Safran modules:
- Module 1: Axial Compressor – Initiates air intake and compression.
- Module 2: Gas Generator Turbine – Powers the compressor through exhaust gases.
- Module 3: Power Turbine – Converts exhaust gas into mechanical energy.
- Module 4: Reduction Gearbox – Lowers engine output speed to drive the main rotor.
- Module 5: Accessories Gearbox – Supports secondary systems like pumps and generators.
This modular architecture reduces time, labor, and cost when performing inspections or part replacements.
Understanding Safran Accessories
Safran accessories support the primary operation of Arriel engines and ensure the seamless functioning of auxiliary systems. Though smaller in size, these components are just as vital as the main engine modules.
Key
Safran accessories include:
- Fuel Control Units (FCUs)
- Overspeed Drain Valves
- Start Drain Valves
- Sensors for temperature, pressure, and RPM
- Free Wheel Shaft Assemblies
- Actuators and couplings
Without properly functioning accessories, an aircraft may experience slow startups, inaccurate readings, fuel flow interruptions, or even engine failure.
Why OEM-Certified Parts Matter
At Black Mountain Aviation, we use only
OEM-certified Safran engine parts, modules, and accessories. Here’s why that matters:
- FAA Compliance – All parts are traceable and meet FAA Part 145 requirements.
- Guaranteed Compatibility – Designed specifically for Arriel 1D1, 2B, 2B1, and 2D engine families.
- Durability & Performance – OEM parts are built to last under real-world flying conditions.
- Safety Assurance – OEM accessories include factory testing and documentation.
We never cut corners with aftermarket or questionable components. Every installation comes with full traceability and airworthiness documentation.
Common Part Numbers We Carry
Some of the frequently serviced or stocked
Safran engine parts at our Boulder City facility include:
- 70BM015420 – 1D1 Module 1
- 70BM035420 – 1D1 Module 3
- 70BM052000 – 2B Module 5
- 0292907680 – Free Wheel Shaft Assembly
- 0164851320 – Fuel Control Unit
- 0174120180 – Overspeed Drain Valve
- 0174078030 – Start Drain Valve
These parts are ready for installation, testing, or exchange at our facility or in the field.
Our Process: From Diagnosis to Delivery
At Black Mountain Aviation, your maintenance experience is as important as the components we install. Our FAA-certified process includes:
- Initial Inspection – Includes borescope analysis, performance testing, and logbook review.
- Part Identification – Cross-reference part numbers, time-before-overhaul (TBO) status, and technical directives.
- Safran Module or Accessory Replacement – Install certified OEM parts with full traceability.
- Engine Testing & Dynamic Balancing – Ensure performance meets or exceeds standards.
- Documentation – Update logbooks, FAA 8130 forms, and inspection reports.
Who We Serve
Black Mountain Aviation supports a wide range of clients in the helicopter community:
- Tour operators flying AS350 or EC130s over Hoover Dam and Lake Mead
- Firefighting and search & rescue teams needing rapid engine support
- Law enforcement agencies flying Airbus H125 helicopters
- Private fleet managers and aviation companies across the Southwest
- Government contractors operating under mission-critical deadlines
Whether it's a single aircraft or a multi-platform fleet, we ensure each helicopter receives precise, safety-focused service with rapid turnaround.
Field Service & Regional Reach
Based at Boulder City Municipal Airport, we offer mobile engine diagnostics and repair services across:
- Las Vegas & Henderson
- Southern Utah & Northern Arizona
- Pahrump, Laughlin & Searchlight, NV
- Lake Havasu & Grand Canyon Region
When your aircraft can’t come to us, we bring certified
Safran accessories and
Safran modules to you—with no compromise on service or compliance.
Why Black Mountain Aviation?
- FAA Part 145 Certified (LVBR789X)
- Over 200 years of combined technician experience
- Factory-trained A&P mechanics specializing in Arriel platforms
- Extensive on-site inventory of Safran engine parts
- Proximity to key operations in Southern Nevada
We don't just install parts—we deliver peace of mind backed by safety, service, and expertise.
Conclusion
When performance, compliance, and speed matter most, trust
Black Mountain Aviation for your
Safran modules and
Safran accessories needs. From modular repairs to certified part replacements, we ensure your helicopter fleet remains mission-ready—on time, every time.
