Are magnetos part of the aircraft electrical system?

• A. Yes, integrated
• B. No, completely independent
• C. Partially integrated
• D. They power avionics as primary source

Answer: (B)

Magnetos are independent ignition sources. They are engine-driven devices that generate the spark for the spark plugs without needing power from the aircraft’s battery or generators. Because they don’t rely on the electrical system for operation, they can continue to provide ignition even if the electrical system fails, which is why they’re described as completely independent from the airplane’s electrical distribution. The electrical system powers avionics and other loads, not the magnetos. That’s why the best choice is that magnetos are entirely independent, not integrated with or powered by the rest of the electrical system.