355A76-6374-00 – Airbus Helicopter OEM Bleed Assembly
Available now on the Airparts.aero Marketplace.
Overview
The 355A76-6374-00 is a genuine OEM bleed air pipe assembly, a flight-critical component engineered by Airbus Helicopters for the twin-engine AS355 "TwinStar" series helicopter. This precision-fabricated assembly is a key part of the aircraft's bleed air system, designed to safely channel extremely hot, high-pressure air tapped from the turbine engine's compressor stage. This bleed air is then used for vital onboard systems, including cabin heating and environmental controls. Manufactured from high-temperature superalloys, this assembly is built to withstand extreme thermal and pressure stresses, ensuring the reliability and safety of the aircraft.
Key Features
- High-Temperature Superalloy Construction: Fabricated from a high-strength, temperature-resistant stainless steel or nickel-based superalloy (such as Inconel). This material is chosen for its ability to maintain its structural integrity and resist oxidation and fatigue at the extreme temperatures of turbine bleed air, which can exceed 500°C (930°F).
- Precision Welds & Flanges: The assembly features precision TIG-welded joints and machined mounting flanges. These are manufactured to exacting tolerances to ensure a perfect, leak-proof fit with the engine bleed air port and the downstream ducting, preventing any leakage of superheated air into the engine bay.
- Engineered for Thermal Expansion: The specific bends and geometry of the pipe assembly are engineered to accommodate the significant thermal expansion and contraction that occurs between a cold start and normal operating temperatures, preventing stress from being imparted on the engine or airframe.
- Flight-Critical System Component: As part of the bleed air system, this component is essential for the proper functioning of the aircraft's heating and environmental control system (ECS), which is critical for crew and passenger comfort and for demisting the canopy.
- Genuine Airbus OEM Part: As a genuine factory component from Airbus Helicopters, it guarantees perfect fitment, certified material composition, and adherence to the stringent quality control standards required for a flight-critical, high-pressure system.
Technical Specifications
- Part Number: 355A76-6374-00
- Component Type: Bleed Air Pipe Assembly
- Material: High-Temperature Stainless Steel or Nickel-Based Superalloy
- Primary Function: Ducts high-pressure, high-temperature air from the engine compressor.
- Features: Precision-welded construction with machined mounting flanges.
- Certification: EASA / FAA Production Approval
Aircraft Compatibility
The 355A76-6374-00 is a specific factory part for the Airbus Helicopters AS355 series. It is imperative to consult the specific helicopter's Illustrated Parts Catalog (IPC) for final verification.
- Primary Helicopter Model:
- Airbus Helicopters AS355 TwinStar (Ecureuil 2)
Applications
The 355A76-6374-00 is a key component of the aircraft's essential systems:
- Cabin Heating & Environmental Control: Provides the source of hot air for the aircraft's environmental control system (ECS), which regulates cabin temperature.
- Component Replacement: Replaced when found to have cracks, corrosion, or damaged flanges during detailed inspections, as a leak in this system can be catastrophic.
- System Overhauls: A key component to inspect and replace as required during major inspections or overhauls of the engines or airframe systems.
Why Choose 355A76-6374-00?
A leak in the high-pressure bleed air system is a major safety-of-flight event. The escaping superheated air can cause severe damage to surrounding wiring, composite structures, and other critical components, potentially leading to an in-flight fire. Using a genuine Airbus Helicopters 355A76-6374-00 OEM part is the only way to ensure the assembly is made from the correct, certified alloy and has passed the rigorous welding inspections and pressure tests required to safely contain these extreme temperatures and pressures. For a system this critical, there is no substitute for the guaranteed quality and airworthiness of a genuine OEM component.
Order Your 355A76-6374-00 Bleed Assembly Now
Ensure the safety and integrity of your aircraft's critical bleed air system with a genuine OEM component. Visit Airparts.aero to order your Airbus Helicopter 355A76-6374-00 bleed air assembly today.
The 355A76-6374-00 is designed to handle bleed air sourced from the P2.5 or P3 stages of the turbine engine's compressor section. This air is at a significant fraction of the engine's overall compression ratio, resulting in both high pressure and high temperature due to adiabatic heating. The design of the pipe assembly, including its wall thickness and bend radii, is carefully calculated using finite element analysis (FEA) to manage hoop stress from the internal pressure and bending stress from thermal expansion and engine vibration, ensuring it does not rupture or crack over its service life. The integrity of this ducting is fundamental to the aircraft's certified performance.
Note: This is a flight-critical component. Installation must be performed by a certified A&P or AME mechanic with experience on the AS355 helicopter, in strict accordance with the current Airbus Helicopters maintenance manual. All associated clamps and seals must be replaced at the time of installation. A thorough leak check must be performed after installation and engine run-up.
