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A9252282400300 – Airbus OEM Lead-Based Electrical Bonding Strap
Available now on the Airparts.aero Marketplace.
The A9252282400300 is a high-performance electrical bonding strap manufactured to Airbus (A92) standards. This component is a critical element of the aircraft's Lightning Protection and Electromagnetic Interference (EMI) shielding system. Bonding straps, such as the A9252282400300, are designed to provide a low-impedance electrical path between isolated conductive parts of the airframe, ensuring that the entire aircraft remains at a uniform electrical potential.1 This "lead-based" variant is specifically engineered for applications requiring high malleability and superior corrosion resistance in environments where vibration and structural flexing are prevalent.
Fabricated as a flexible, braided or laminated conductor, the A9252282400300 facilitates the safe dissipation of static electricity and high-current lightning strikes to the aircraft's primary ground structure. In addition to lightning protection, this bonding strap plays a vital role in the "quiet" operation of avionics by grounding secondary structures and preventing the buildup of electrostatic charges that could lead to radio frequency interference (RFI). As an OEM Airbus part, it is built to withstand the rigorous thermal and mechanical stresses of the aerospace environment, ensuring long-term electrical continuity across the airframe's lifecycle.
Key Features
Lead-Based Composition: Formulated for maximum flexibility and chemical stability, providing excellent resistance to galvanic corrosion when mated with diverse airframe materials.
Low-Impedance Path: Engineered to provide a DC resistance typically below 0.0025 ohms, ensuring efficient current transfer during lightning events.
Vibration Fatigue Resistance: The flexible braid or laminate design allows the strap to endure millions of structural flex cycles without work-hardening or mechanical failure.
Precision Termination: Features high-integrity terminal lugs designed for a gas-tight interface with grounding studs, preventing the ingress of moisture and subsequent oxidation.
EMI/RFI Suppression: Effectively grounds shielding and secondary structures to maintain a robust electromagnetic environment for sensitive flight deck electronics.
Technical Specifications
Part Number: A9252282400300
Manufacturer: Various Airbus-Approved Suppliers
Component Type: Electrical Bonding Strap / Jumper
Material: Lead-based core or coating for enhanced malleability and corrosion resistance.
Configuration: Flexible flat braid or laminated strap.
Resistance: $\le 2.5\text{ m}\Omega$ (Nominal)
Length: Specifically defined by the A925228-series drawing.
Governing Specifications: ABS0913 (Airbus Bonding Standard), RTCA DO-160
Certification: EASA Form 1 / FAA-PMA / Airbus OEM Standard
Aircraft Compatibility
Airbus A318 / A319 / A320 / A321 (CEO & NEO)
Airbus A330 / A340 Series
Airbus A350 XWB (specific grounding applications)
Note: While a standard Airbus part, exact placement depends on the station and system. Always cross-reference the Aircraft Maintenance Manual (AMM) and Illustrated Parts Catalog (IPC) for correct effectivity.
Applications
Lightning Protection: Diverting high-current strikes from external fairings to the main airframe ground.
Fuel System Grounding: Ensuring all components within fuel tank zones are bonded to prevent electrostatic discharge (ESD) and sparking.
Control Surface Bonding: Providing electrical continuity between moving flight controls (ailerons, elevators) and the fixed wing/stabilizer structures.
Why Choose A9252282400300?
Choosing the OEM Airbus A9252282400300 is essential for maintaining the certified lightning protection envelope of the aircraft. Using "commercial grade" grounding wire or non-certified straps can introduce high electrical resistance at the joint, which, during a lightning strike, can cause localized heating, arcing, or catastrophic failure of the bond. The A9252282400300 is meticulously tested for its ability to handle high-amperage transients while remaining flexible enough to avoid fatigue cracking, ensuring the long-term safety and electronic integrity of the airframe.
The A9252282400300 functions through the principle of Equipotential Bonding. In a Faraday Cage system like an aircraft fuselage, it is imperative that no two conductive sections remain electrically isolated. Isolated sections can act as anisotropic capacitors, accumulating charge until a Dielectric Breakdown occurs, resulting in a spark. The lead-based construction of this strap is specifically utilized for its Work-Hardening Resistance; unlike pure copper, which becomes brittle under vibration, the lead-enriched matrix maintains a high degree of Ductility.
Furthermore, the strap is designed to mitigate the Skin Effect during high-frequency lightning discharges. By using a braided or flattened geometry, the surface-area-to-volume ratio is maximized, allowing the high-frequency components of a lightning strike to travel along the outer conductor path with minimal Inductive Reactance ($X_L$). This prevents the voltage from "stepping up" at the bond point, thereby protecting sensitive avionics from High-Intensity Radiated Fields (HIRF) and ensuring the structural integrity of the airframe under extreme electrical stress.
Note: The A9252282400300 is a flight-critical safety component. Maintenance must involve periodic bonding checks using a calibrated Milli-Ohmmeter (e.g., Aero-Check or similar) to ensure resistance remains within the limits specified in Airbus AMM Chapter 20 (Standard Practices). Surfaces must be cleaned to "bright metal" and treated with an approved conductive anti-corrosion compound prior to installation. Installation must be performed by a certified mechanic.
Documentation
FAA AC 43-13-1B - Chapter 11: Aircraft Electrical Systems (Bonding & Grounding)
No public-facing OEM drawing was located for this specific part number. Refer to the Airbus SRM (Structural Repair Manual) or the ESPM (Electrical Standard Practices Manual) for detailed installation and resistance limits.
