29435-002 – Cirrus Aircraft OEM Field Control Module
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Overview
The Cirrus Aircraft 29435-002 is a genuine OEM Field Control Module (FCM), a sophisticated electronic unit that serves as the dedicated voltage regulator and controller for Alternator 2 in Cirrus SR20 and SR22 aircraft. This solid-state module is a flight-critical component of Cirrus's redundant electrical architecture, ensuring the stability and health of the secondary power generation system. It precisely modulates the field current supplied to Alternator 2, thereby regulating its output voltage, while also providing essential over-voltage protection for the entire electrical bus and all connected avionics.
Key Features
- Precise Voltage Regulation: Continuously monitors the aircraft's main bus voltage and precisely adjusts the field current to Alternator 2. This maintains a stable and consistent system voltage (typically 28.0 - 28.5 VDC) under varying electrical loads.
- Over-Voltage Protection: Features an integrated over-voltage protection circuit. If the module detects a voltage spike exceeding a safe threshold, it will automatically shut down the alternator's field, taking the alternator offline to protect all sensitive avionics and electronic components from damage.
- Solid-State Reliability: Engineered with modern, solid-state electronics, providing exceptional reliability and a long service life with no moving parts to wear out or fail. The unit is fully encapsulated for resistance to vibration and moisture.
- System Integration: Designed to work seamlessly within the Cirrus electrical system, interfacing with the cockpit alternator annunciation lights and circuit breakers to provide clear status indications to the pilot.
- Genuine Cirrus OEM Part: As a genuine factory component, it guarantees perfect compatibility with the Cirrus electrical architecture, correct set points for voltage and over-voltage protection, and full airworthiness certification.
Technical Specifications
- Part Number: 29435-002
- Component Type: Alternator Field Control Module / Voltage Regulator
- Primary Application: Controller for Alternator #2
- Input Voltage: Aircraft Bus Voltage (Nominal 28 VDC)
- Output: Modulated Field Current to Alternator #2
- Protective Functions: Over-Voltage Protection, Field Control
- Certification: FAA Production Approval
Aircraft Compatibility
The 29435-002 Field Control Module is the specific OEM controller for the secondary alternator on a wide range of Cirrus aircraft. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification of applicability for your aircraft's serial number.
- Primary Aircraft Models:
- Cirrus SR20 (G2, G3 and later models with dual alternators)
- Cirrus SR22 & SR22T (G2, G3 and later models)
Applications
The 29435-002 is a flight-critical component of the electrical power generation system:
- Secondary Power Generation: Its primary function is to control Alternator 2, which serves as a redundant power source in the event of a failure of the primary alternator (Alternator 1).
- Electrical System Protection: Safeguards the entire suite of avionics, lighting, and electronic systems from damage due to voltage spikes or alternator faults.
- Electrical System Troubleshooting: A key component to inspect and test when diagnosing issues such as an inoperative Alternator 2, voltage fluctuations, or "ALT 2" annunciations in the cockpit.
Why Choose 29435-002?
The health of an aircraft's electrical system is paramount, especially in a modern, all-glass cockpit aircraft like a Cirrus. An over-voltage event can destroy tens of thousands of dollars worth of avionics in an instant. The 29435-002 is the genuine, factory-specified component designed to prevent this. Using a genuine Cirrus OEM part ensures that the voltage set points and protection logic are perfectly calibrated for the aircraft's systems. For a component this critical to the safety and reliability of your aircraft, there is no substitute for a fully traceable, certified OEM part.
Order Your 29435-002 Field Control Module Now
Ensure the stability and protection of your aircraft's advanced electrical system with a genuine Cirrus OEM component. Visit Airparts.aero to order your 29435-002 Field Control Module today.
The 29435-002 Field Control Module is a key element in Cirrus's design philosophy of system redundancy. In the dual-bus electrical system, Alternator 1 (controlled by the MCU) is the primary power source. The 29435-002 and Alternator 2 provide a completely independent, secondary source of power generation. The FCM constantly monitors system voltage. Under normal conditions, it may allow Alternator 2 to share the load or simply stand by. If it senses a voltage drop indicating the failure of Alternator 1, it will instantly bring Alternator 2 online to full capacity to power the essential bus, ensuring that primary flight instruments and avionics remain operational. This seamless redundancy is critical for IFR flight and overall system safety.
Note: This is a flight-critical electrical system component. Installation and testing must be performed by a certified A&P mechanic or avionics technician with experience in Cirrus aircraft systems, in accordance with the current Cirrus Aircraft maintenance manual. All electrical troubleshooting and replacement should be performed with the battery disconnected.
