?unique=1b9a778)
649304 – Aerotech Overhauled Alternator Assembly (100A/24V)
Available now on the Airparts.aero Marketplace.
Overview
The Aerotech 649304 is a flight-critical, overhauled aircraft alternator assembly, rated for 100 Amps at 24 Volts (for 28VDC systems). This high-output unit serves as the primary source of electrical power for a wide range of twin-engine piston and turboprop aircraft, or high-demand single-engine applications. As an overhauled component, it offers a reliable and cost-effective alternative to a factory-new unit, having been meticulously rebuilt and tested to meet or exceed original equipment manufacturer (OEM) specifications under an FAA-approved process. Its function is essential for powering all avionics, lighting, and electrical systems while simultaneously charging the aircraft's battery. ⚡
Aerotech, a reputable FAA-certified repair station, performs the overhaul, which typically involves complete disassembly, rigorous inspection (including non-destructive testing), replacement of all wear-limited components (such as bearings, brushes, and seals), and precision reassembly. The unit is then subjected to comprehensive performance testing to ensure it delivers the full 100 Amp output reliably across the operational envelope. This alternator provides the robust power generation required for modern, well-equipped aircraft.
Key Features
Professionally Overhauled: Rebuilt by Aerotech under an FAA-approved process, ensuring quality and conformity.
FAA Certified (8130-3 Tag): Typically supplied with an FAA Form 8130-3 Airworthiness Approval Tag, certifying its return to service.
High Output - 100 Amps: Provides ample power for complex avionics suites, anti-ice systems, and other high-demand electrical loads.
Cost-Effective Solution: Offers significant cost savings compared to purchasing a factory-new alternator, without compromising safety or reliability.
Meets or Exceeds OEM Specifications: Overhauled and tested to ensure performance is equivalent to or better than the original component.
Core Exchange Program: Often available on an exchange basis, requiring the return of a repairable core unit.
Technical Specifications
Part Number: 649304 (Aerotech Overhauled Unit)
Component Type: Engine-Driven Alternator Assembly
Overhauler: Aerotech (FAA Certified Repair Station)
Voltage Rating: 24 VDC (for 28V nominal aircraft systems)
Maximum Continuous Output: 100 Amps
Drive Type: Typically Gear Driven (verify based on core P/N)
Cooling: Typically Forced Air (Blast Tube) Cooling
Certification: FAA Form 8130-3 (Airworthiness Approval Tag)
Aircraft Compatibility
This high-output alternator is commonly found on a variety of twin-engine piston and turboprop aircraft, as well as some high-performance single-engine models. Potential applications include aircraft equipped with:
Engine Series: Lycoming (T)IO-540, Continental (T)SIO-520, IO-550, and potentially some P&WC PT6A turboprops.
Common Aircraft Families: Beechcraft Baron/Duke, Cessna 300/400 series, Piper Seneca/Navajo/Cheyenne, and others requiring 100A/28V power.
Note: This compatibility list is for general reference only. The specific aircraft Illustrated Parts Catalog (IPC), maintenance manual, or applicable STC documentation is the final and absolute authority for determining part applicability.
Applications
Primary Electrical Power Generation: Supplies all electrical power for aircraft systems during flight.
Battery Charging: Maintains the charge state of the aircraft's battery.
Direct Replacement: Used to replace time-expired or failed original equipment alternators.
Why Choose 649304 (Overhauled)?
Choosing an overhauled alternator like the Aerotech 649304 is a smart decision for cost-conscious operators who demand certified reliability. It provides the same essential function and meets the same performance standards as a new unit but at a substantially lower price point. The rigorous FAA-regulated overhaul process ensures that all critical components are inspected and replaced as necessary, resulting in a component that is often just as reliable as new. Backed by the reputation of Aerotech and an FAA 8130-3 tag, this overhauled alternator offers a safe, airworthy, and economical solution for maintaining your aircraft's electrical system. 💰
The overhaul process for an alternator like the 649304 is a meticulous, multi-step procedure governed by FAA regulations and the component's original maintenance manual (CMM). It begins with complete disassembly and thorough cleaning. All components are then visually and dimensionally inspected. Critical parts like the rotor and stator undergo non-destructive testing (NDT) such as magnetic particle or fluorescent penetrant inspection to detect microscopic cracks. All wear-limited items—typically including bearings, brushes (if applicable), seals, and often the rectifier diodes and voltage regulator (if internal)—are replaced with new, certified parts regardless of their apparent condition. The unit is then carefully reassembled, lubricated per specification, and subjected to a full functional test on a calibrated test bench. This test verifies output voltage, current regulation, stability under load, and proper operation across the specified RPM range, ensuring the overhauled unit meets or exceeds the performance of the original.
Note: The 649304 is a flight-critical component. Installation must be performed by a certified A&P/IA mechanic. All electrical connections must be clean, secure, and torqued to specified values. Ensure the cooling blast tube (if required) is properly installed and unobstructed. A core charge typically applies, and the returned core must meet the overhauler's criteria for acceptance.
Documentation
Authoritative documentation consists of the FAA Form 8130-3 provided with the unit, the overhauler's release certificate, and potentially a reference to the original Component Maintenance Manual (CMM) used during the overhaul process. Installation procedures are found in the specific aircraft maintenance manual.
Core Deposit - $550.00
Applicable Aircraft
- Baron Series B55, E55, 58 or G58
- Bonanza 36
