10-682555-14R - Kelly Aerospace Bendix Dual Magneto D4RN-3000

10-682555-14R - Kelly Aerospace Bendix Dual Magneto D4RN-3000

Genuine OEM Part

Description:   BENDIX DUAL MAGNETO
Part number:   10-682555-14R

** CORE DEPOSIT $1,000.00 **

The 10-682555-14R is a flight-critical, factory-overhauled Bendix-type D4RN-3000 Series dual ignition magneto assembly engineered by Kelly Aerospace Energy Systems. This high-performance component provides self-contained, engine-driven high-voltage electrical energy directly to an aircraft engine's combustion chambers via twin sets of spark plugs. Designed specifically for high-utilization piston powerplants, the dual magneto configuration integrates two completely independent magneto electrical circuits—housing distinct primary/secondary coils, breakers, and capacitors—within a single physical housing driven by a single engine accessory shaft. This layout dramatically reduces weight and accessory pad space while adhering strictly to the safety redundancy mandates required for civil aircraft operations.

The "R" suffix designates a factory-remanufactured or overhauled-exchange component built to meet or exceed original OEM specifications. The D4RN-3000 model utilizes a right-hand (clockwise) rotation configuration, a 3000 Series distribution matrix, and an integrated impulse coupling system. This mechanic-preferred ignition unit acts as an autonomous power generator, remaining entirely independent of the aircraft's primary electrical bus, battery, and alternator systems. This ensures continuous, uninterruptible engine operation and ignition safety margins even during a catastrophic total electrical failure in flight.

The Kelly Aerospace 10-682555-14R is essential for maintaining fleet airworthiness, engine starting reliability, and regulatory compliance under FAA and EASA standards. Its precision internal timing gears and high-dielectric distribution blocks eliminate high-altitude misfires and arc-tracking, which reduces carbon fouling and stabilizes power output. For power plant mechanics, flight schools, and commercial general aviation operators, sourcing this dual-release overhauled magneto guarantees predictable performance across challenging operating profiles, short-field departures, and continuous high-altitude cruise segments.

Key Features

• Integrated Dual-Circuit Housing: Consolidates left and right magneto electrical circuits onto a single drive shaft, optimizing accessory pad footprint while providing full redundant ignition safety.

• Mechanical Impulse Coupling System: Delivers a spring-loaded, retarded hot spark during the engine starting cycle to maximize cold-start efficiency and eliminate engine kick-back.

• Advanced Dielectric Distributor Block: Molded from high-performance thermo-setting plastics to prevent high-voltage leakage, carbon tracking, and arc-over at elevated service altitudes.

• Premium Fine-Wire Breaker Points: Engineered with heavy-duty contact metallurgy to minimize point erosion, preserve dwell angle accuracy, and extend intervals between internal timing checks.

• Autonomous Low-Impedance Coil Windings: Uses heavy-gauge copper primaries and high-density secondary wraps to achieve a high voltage step-up ratio and consistent spark energy delivery.

Technical Specifications

• Part Number: 10-682555-14R (Cross-Reference: S100D1-15, 66E21567-70)

• Component Type: Series D3000 Aircraft Dual Ignition Magneto

• OEM Manufacturer / Overhauler: Kelly Aerospace Energy Systems / Bendix (TCM)

• Model Series: D4RN-3000

• Rotation Direction: Right-Hand (Clockwise) from Drive End

• Cylinder Accommodation: 4-Cylinder Aircraft Engines

• Starting Assist: Mechanical Impulse Coupling (Left & Right retarded spark control)

• Housing Material: High-Strength Die-Cast Aluminum Alloy

• Primary Voltage Output: ~200V to 300V across primary circuit breaking points

• Secondary Voltage Output: Up to 20,000V+ delivered to spark plug terminals

• Certification Status: Dual Release Eligible (FAA Form 8130-3 / EASA Form 1)

• Governing Specifications: FAA FAR Part 21/33 Type Certificate Standards

Aircraft & Engine Compatibility

• Lycoming Engines: O-360-A1D, O-360-A1G6, IO-360 Series, LIO-360 Series, O-540 Series (Verify specific model variants using a single dual-mag drive pad layout).

• Airframe Applications: Piper PA-28-201T Turbo Dakota, Mooney M20 Series, Beechcraft Duchess 76, Robinson R22/R44 Helicopters (subject to engine model match).

• Note: The engine and airframe Illustrated Parts Catalog (IPC) or specific Supplemental Type Certificate (STC) paperwork remains the final authority for physical model effectivity and configuration control.

Applications

• Primary Powerplant Ignition: Functions as the standalone electrical generator delivering synchronized spark impulses to ignite the compressed fuel-air mixture.

• All-Weather Flight Operations: Maintaining steady internal engine combustion metrics during high-moisture, icing, or heavy precipitation profiles.

Why Choose 10-682555-14R?

Installing a factory-overhauled Kelly Aerospace 10-682555-14R ensures that your aircraft's ignition profile conforms precisely to its original certified engine type data sheet. Substandard field-overhauled magnetos or units utilizing aged, non-destructive testing (NDT) non-compliant rotables often exhibit primary capacitor breakdown, internal bearing seizure, or oil seal deformation. When an internal drive seal perishes, engine oil enters the dry breaker compartment, coating the points and causing immediate point-burn, tracking failure, or total dual-system dropout. Because both ignition lines rely on a shared single rotor shaft, using an unverified, poorly built dual magneto exposes the operator to complete engine stoppage from a single mechanical failure point. Kelly's precision assembly tolerances and dual-release certifications protect against unexpected internal gear shear, securing complete dispatch safety.

The operational execution of the 10-682555-14R relies on the fundamental physics of electromagnetic induction and Lenz's Law, combined with a unique mechanical delay mechanism to modify timing constraints. As the engine accessory drive rotates the internal anisotropic permanent magnet rotor, its moving magnetic field cuts across the core of the primary coil, inducing an alternating current (AC) wave. When this primary current reaches its maximum value, the mechanical breaker points are physically pried open by the internal cam lobe. This sudden open-circuit condition halts primary current flow, collapsing the electromagnetic field instantly. This collapse cuts across the multi-turn secondary winding, generating an immediate high-voltage step-up spike (up to 20,000 Volts) through mutual induction.

To prevent internal arcing across the opening points, a primary capacitor is wired in parallel to absorb transient energy surges. During low-RPM engine cranking, standard advance timing would cause premature combustion and engine kick-back. The integrated impulse coupling prevents this via a spring-loaded latching system that catches the magneto rotor, pausing its rotation while the engine crankshaft continues to turn. At the exact top-dead-center position, a mechanical body ramp trips the latch, releasing the wound spring. This drives the internal magnet rotor forward at high angular acceleration, generating a hot, retarded spark that guarantees reliable engine starting regardless of low starter-cranking speeds.

Note: The Kelly Aerospace 10-682555-14R is a flight-critical engine component subject to mandatory maintenance cycles. Dual magnetos require an extensive internal timing and inspection verification ("500-hour inspection") every 500 hours of operational service, along with strict adherence to any applicable Airworthiness Directives (ADs). Installation, engine timing adjustments (internal and external), and P-lead ground circuit verification must be executed exclusively by a certified A&P/IA mechanic or authorized engine repair facility in strict accordance with the Kelly Aerospace Service Support Manual and the engine manufacturer's Maintenance Manual. Incorrect external timing can lead to catastrophic engine detonation, pre-ignition, severe cylinder damage, or total loss of engine power.

Documentation

• Continental / Bendix Ignition Application Data Service Support Manual (X44001 Reference)

• FAA Advisory Circular AC 43.13-1B: Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair (Chapter 11: Electrical & Ignition Systems)

• No public-facing OEM dimensional blueprint download is available for this specific proprietary rotable magneto assembly; all technical wiring matrices and internal timing clearances must be cross-referenced via an authorized Kelly Aerospace technical publications subscription portal.