CH34595 - Champion Aerospace Turbine Engine Igniter ARRIEL 1B

CH34595 – Champion Aerospace High-Energy Turbine Igniter for Safran Arriel 1B

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The Champion Aerospace CH34595 is a flight-critical, high-energy turbine engine igniter plug, engineered with exacting precision for the Safran (formerly Turbomeca) Arriel 1B turboshaft engine. As a core component of the engine's ignition system, the CH34595 is responsible for delivering the powerful, high-temperature spark required to reliably initiate combustion of the fuel-air mixture within the engine's combustor. Its performance is paramount for successful engine starts on the ground and for the critical capability of in-flight relighting in the event of a flameout.

Constructed from advanced materials designed to withstand the extreme thermal, corrosive, and vibratory stresses of a turbine engine environment, this igniter represents the pinnacle of ignition technology. Its design ensures a long service life and consistent, high-energy discharge, providing the reliability demanded by helicopter operations. The CH34595 is not merely a spark plug; it is an engineered solution integral to the safety and operational readiness of the aircraft.

Key Features

• Engine-Specific Design: Precisely engineered for the unique combustion dynamics and physical interface of the Safran Arriel 1B engine.

• High-Purity Alumina Insulator: Utilizes a high-dielectric strength aluminum oxide (Al2​O3​) ceramic to prevent voltage flashover under the high-pressure conditions of the combustor.

• Superalloy Construction: The igniter shell is fabricated from a nickel-based superalloy, providing exceptional resistance to oxidation, corrosion, and thermal stress at extreme operating temperatures.

• Constrained-Gap Firing Tip: Features a semi-conductor/surface gap design that provides a self-cleaning action with each spark, offering superior resistance to carbon fouling and fuel coking.

• High-Reliability Sealing: Designed to create a positive seal in the igniter boss, preventing the escape of high-pressure combustion gases.

• Long Service Life: Engineered for durability and wear resistance, ensuring reliable performance throughout its mandated service life as specified by the engine manufacturer.

Technical Specifications

• Part Number: CH34595

• Component Type: High-Energy Turbine Engine Igniter Plug

• OEM Manufacturer: Champion Aerospace

• Primary Engine Application: Safran (Turbomeca) Arriel 1B

• Materials:

  • Insulator: High-Purity Aluminum Oxide Ceramic

  • Shell: Nickel-Based Superalloy (Material must be confirmed via OEM documentation).

  • Center Electrode: Platinum or Iridium alloy tip for maximum erosion resistance (Material must be confirmed via OEM documentation).

• Ignition System Type: Designed for use with High-Energy (HE) Capacitor-Discharge exciter systems.

• Electrical Connection: Standard threaded terminal for secure connection to the ignition lead.

Aircraft Compatibility

The CH34595 igniter is the specified component for the Safran Arriel 1B turboshaft engine, which is the primary powerplant for the following helicopter model:

• Airbus Helicopters (Eurocopter): AS350B2 Ecureuil / AStar

Crucial Note: Verification against the specific engine's current Illustrated Parts Catalog (IPC) and maintenance manual is mandatory to ensure correct part number applicability and installation eligibility.

Applications

The sole function of the CH34595 is to provide the initial ignition source within the combustion chamber of the Arriel 1B engine. It is energized by the ignition exciter only during the following operations:

• Ground Starting Sequence

• In-Flight Engine Relight Procedures

Why Choose CH34595?

Choosing the OEM-specified Champion CH34595 is a direct investment in flight safety and engine reliability. The ability to start an engine is critical, but the ability to relight it in flight is a non-negotiable safety function. This igniter is the result of extensive research and development, tailored to the unique operating characteristics of the Arriel 1B. Using unapproved or non-OEM parts introduces unacceptable risk, including poor ignitability, premature fouling, or catastrophic component failure, all of which could prevent a successful engine start or relight. The Champion CH34595 ensures performance that is certified and trusted by the engine manufacturer.

The operational superiority of the CH34595 igniter is rooted in the physics of its constrained-gap design and its synergy with a high-energy, capacitor-discharge exciter. Unlike a simple air gap, the spark channel is forced to propagate across the face of a proprietary semiconductor pellet fused into the insulator tip. When the exciter releases its stored energy (typically 3-12 joules) as a high-current pulse, the resulting plasma channel ablates a microscopic layer of carbon or fuel deposits from the semiconductor surface. This self-cleaning or "shunting" effect provides exceptional resistance to fouling. Furthermore, the high-current discharge creates a significantly larger and more energetic ignition kernel compared to lower-energy systems. This large, high-temperature plasma front is capable of reliably igniting atomized fuel droplets even under sub-optimal conditions, such as cold-soaked fuel, low atmospheric density at altitude, or high-velocity airflow during an in-flight relight attempt.

Note: The CH34595 is a flight-critical component with a service life defined by the engine manufacturer's maintenance program, typically measured in flight hours or start cycles. This component is part of a high-voltage system; extreme caution must be exercised during inspection and maintenance. Installation and removal must be performed by a certified A&P mechanic in strict accordance with the engine maintenance manual and all applicable safety procedures.

Documentation

No public-facing OEM or regulatory documentation was located for this part. All technical data, service life information, and installation procedures must be sourced from the Safran Arriel 1B engine maintenance and parts manuals.