ALU8521LS – Hartzell Engine Technologies 24V/70A BD Alternator Assembly (Replaces ALU-8421LS)
Available now on the Airparts.aero Marketplace.
Overview
The ALU8521LS Alternator Assembly by Hartzell Engine Technologies is a 24-volt, 70-amp belt-driven alternator designed as a direct replacement for the ALU-8421LS, offering improved reliability, performance, and FAA-PMA certified airworthiness. Specifically engineered for piston-powered general aviation aircraft, this alternator supports modern avionics, electrical accessories, and battery charging systems with stable voltage output and high current capacity.
Built to withstand harsh engine compartment conditions, the ALU8521LS features a rugged rotor-stator system, integrated voltage regulation compatibility, and precision-balanced internal components for smooth, efficient operation under all flight regimes. Whether you’re upgrading your electrical system or replacing a worn OEM unit, this alternator ensures OEM-equivalent fitment with enhanced durability.
Key Features
- 24V, 70A Output: Supports advanced avionics, lighting systems, and charging functions in high-demand aircraft.
- FAA-PMA Certified: Approved for use in certificated aircraft, ensuring airworthiness and compliance.
- Direct Replacement for ALU-8421LS: Matches OEM mounting dimensions and electrical specifications.
- Durable Construction: Sealed bearings and heat-resistant windings extend service life.
- Low Vibration Design: Internal balancing minimizes noise and mechanical stress.
- Enhanced Electrical Stability: Delivers steady voltage and current across all RPM ranges.
Technical Specifications
- Part Number: ALU8521LS
- Manufacturer: Hartzell Engine Technologies
- System Type: Belt-driven alternator
- Voltage: 24 Volts DC
- Amperage: 70 Amps
- Mounting: OEM-standard direct replacement
- Certification: FAA-PMA
- Replacement For: ALU-8421LS
- Cooling: Air-cooled via engine compartment airflow
- Applications: Aircraft electrical generation, battery charging, avionics support
Aircraft Compatibility
Commonly used in:
- Beechcraft Bonanza / Baron
- Cessna 210, 310, 421
- Piper PA-46 / Malibu / Mirage
- Other general aviation aircraft using ALU-8421LS or equivalent
Always confirm compatibility with IPC or OEM documentation. Installation by certified technician required.
Applications
- Electrical System Rebuilds
- Avionics Upgrade Support
- Battery Charging Solutions
- Replacement for Failed or Aging Alternators
Why Choose the ALU8521LS Alternator?
- Higher Reliability: Built to outperform and outlast the ALU-8421LS with modern materials and processes.
- Plug-and-Play Replacement: Avoids modification and simplifies installation.
- Airworthiness Assured: PMA certification guarantees safe, legal operation in certified aircraft.
- Fleet-Proven Performance: Used by flight schools, charter fleets, and private owners worldwide.
Order Your ALU8521LS Alternator Today
Power your aircraft with FAA-approved, reliable alternator performance.
Order the ALU8521LS Hartzell Alternator from Airparts.aero today — offering fast shipping, expert support, and trusted electrical performance for your aircraft.
The ALU8521LS 24V/70A alternator by Hartzell Engine Technologies is a robust, PMA-approved solution for replacing aging alternators like the ALU-8421LS. Designed for general aviation piston aircraft, it supports demanding electrical systems including glass cockpit upgrades, EFIS, autopilot systems, and more. With Hartzell’s reputation for excellence in aircraft power systems and Airparts.aero’s rapid order fulfillment, pilots and maintenance teams can trust this alternator for long-term, airworthy performance.
Ensure proper pulley alignment and belt tension during installation. Use only certified maintenance personnel.
