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115352-1 – Textron Aviation OEM APU Ignition Cable
Available now on the Airparts.aero Marketplace.
The Textron Aviation 115352-1 is a flight-critical, high-voltage OEM Auxiliary Power Unit (APU) ignition cable assembly engineered for high-reliability turbine starting cycles under extreme environmental parameters. Operating as the primary power conduit within the APU’s starting sub-system, this shielded high-tension lead transfers pulsed electrical energy from the ignition exciter box directly to the combustion chamber’s igniter plug. Optimized for demanding corporate and regional airframes—including the Hawker and Cessna Citation fleets—the 115352-1 provides immediate fuel-air mixture light-off during ground operations and high-altitude emergency inflight restarts.
Manufactured to rigid aerospace defense specifications under Honeywell / Hamilton Sundstrand design control and distributed under Textron Aviation oversight, this ignition cable incorporates comprehensive electromagnetic shielding and severe-duty thermal protection layers. The core conductor is insulated with high-dielectric fluoropolymer and silicone matrices, preventing voltage tracking and insulation breakdown when subjected to the intense heat spikes of the APU nacelle. The outer profile is encased in an aggressive nickel-plated copper braid that suppresses high-frequency Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI), isolating the high-energy ignition pulse from nearby digital avionics and flight-deck data streams.
The Textron 115352-1 represents the industry benchmark for starting sub-system endurance, ensuring reliable turbine ignition over thousands of thermal cycles. Its precision-machined, anti-seize coupling nuts provide a gas-tight, vibration-isolated connection at both the exciter and igniter terminals, mitigating the risk of micro-arcing and contact erosion. For corporate fleet directors, regional operators, and certified A&P technicians executing APU mid-life field inspections, selecting this genuine factory-original lead maintains the airframe’s certified type data baseline and preserves aircraft dispatch reliability.
Key Features
High-Energy Pulse Transmission: Engineered to handle high instantaneous voltage peaks from the exciter without suffering internal dielectric breakdown or energy attenuation.
Superior EMI/RFI Mitigation: Double-braided nickel-plated shielding forms an integrated Faraday cage to block transient RF bursts from compromising navigation and communication buses.
Advanced Multi-Layer Insulation: Formulated with high-purity silicone rubber and fluoropolymer matrices to resist carbon tracking and maintain insulation integrity at high operating altitudes.
Heavy-Duty Vibration Dampening: Mechanical termination geometry isolates the core conductor from the extreme harmonic frequencies typical of high-RPM APU operations.
Corrosion-Resistant Hardware: Precision coupling nuts feature specialized surface finishes to eliminate thread-binding and galvanic lockup inside tight APU compartments.
Technical Specifications
Part Number: 115352-1 (Cross-Reference: Hamilton Sundstrand / Pratt & Whitney Series Indices)
Component Type: Shielded Auxiliary Power Unit (APU) Ignition Lead Assembly
OEM Manufacturer / Design Control: Textron Aviation / Hamilton Sundstrand (Honeywell)
Primary System Match: Pratt & Whitney / Hamilton Sundstrand APS500 Series and associated T-62T APU powerplants
Outer Shielding Material: High-Coverage Nickel-Plated Copper Wire Braid
Dielectric Core: Extruded Polytetrafluoroethylene (PTFE) and High-Temperature Silicone
Voltage Capacity: Rated to withstand transient discharge bursts up to 20 kV+
Continuous Temperature Range: Operating parameters verified from $-55^{\circ}\text{C}$ to $+260^{\circ}\text{C}$ (Terminal well thresholds up to $+500^{\circ}\text{C}$)
Governing Specifications: RTCA DO-160 Environmental Categories, FAA-PMA / TSO standards
ECCN: 9A991.d
Certification Status: Airworthiness Release Eligible (FAA Form 8130-3 / EASA Form 1 Dual Release)
Aircraft & APU Compatibility
Textron Aviation / Hawker Fleet: Hawker 800XP, 850XP, 900XP, and 750 Series (utilizing auxiliary turbine assemblies).
Cessna Citation Family: Mid-size Citation platforms configured with standalone cabin climate and starting APU compartments.
Regional Platforms: Multi-engine regional configurations utilizing APS500 or T-62T auxiliary power infrastructure.
Note: The specific airframe Illustrated Parts Catalog (IPC), APU Component Maintenance Manual (CMM), or STC configuration paperwork must serve as the final authority for physical part effectivity and serial number control.
Applications
Auxiliary Power Unit Starting Loop: Establishes the safe high-voltage transit path routing spark energy from the capacitive exciter unit to the combustion igniter.
Inflight Emergency Power Restoration: Guarantees starting performance during high-altitude bleed-air or electrical network failures.
Why Choose 115352-1?
Installing a genuine OEM Textron 115352-1 ignition cable guards against the systemic start failures common to weathered or non-certified ignition leads. Over time, high thermal cycling causes minor micro-fracturing within sub-layer insulations. When an inferior or aged cable encounters a high-voltage pulse, the current cuts through the deteriorated core to find an alternate ground path against the airframe skin before reaching the igniter plug tip. This insulation leak results in a "no-spark" or weak-spark condition, causing hung starts, tailpipe unburnt fuel pooling, or total starting failure. Sourcing fully traceable factory hardware ensures exact impedance matching, preventing energy reflection back into the exciter box and safeguarding the entire electrical sub-system.
The performance mechanics of the Textron Aviation 115352-1 ignition cable turn on the principles of high-voltage pulse-power stabilization and electromagnetic compatibility (EMC) attenuation. When the ignition exciter discharges its stored energy bank, a high-frequency, transient current wavefront passes down the conductor core. To transfer this energy without suffering from skin-effect losses or localized inductive heating, the inner conductor configuration relies on high-purity metals with a smooth surface finish. The surrounding extruded polytetrafluoroethylene (PTFE) insulation acts as an isotropic dielectric barrier that prevents high-altitude corona discharge and dielectric tracking across deep pressure drops.
Concurrently, the dual-layered, nickel-plated grounding braid operates via the laws of Faraday cage shielding. It collects and grounds the high-amplitude radio frequency noise generated by the fast rise-time of the spark discharge, preventing capacitive and inductive cross-talk from leaking into nearby low-voltage avionics lines. This shielding preserves signal-to-noise ratios across the airframe data bus while the gas-tight terminal seals eliminate the entry of vaporized aviation fluids and atmospheric moisture into the connection well, maintaining precise impedance match metrics under heavy thermal variations.
Note: The Textron Aviation 115352-1 is a high-voltage, flight-critical power plant starting component. Dropping the cable, bending it below its minimum specified bend radius, or contaminated terminal contacts can induce internal core fractures or rapid flashover tracking, leading to catastrophic APU start failures or internal nacelle fires. Cable routing, thread inspection, and final torque matching must be executed exclusively by a certified A&P mechanic or authorized MRO facility in strict compliance with the target airframe’s Aircraft Maintenance Manual (AMM) and APU Line Maintenance Manual (Chapter 49). Always apply specified dry thread limits and check terminal ceramic inserts for micro-cracks before final installation.
Documentation
Honeywell / Hamilton Sundstrand Commercial Auxiliary Power Unit Product Support Reference
No public-facing standalone engineering blueprint or dimensional production print is available for this proprietary part sequence due to strict international aviation security and intellectual property restrictions; all dimensional routing paths must be cross-referenced via a licensed Textron Aviation Technical Publications portal.
