Understanding the Role of Magnetos in Aircraft Engines

When it comes to keeping an aircraft engine running smoothly and safely, magnetos play a critical role. But what exactly are they, and why are they so important?

🔧 What Is a Magneto?

A magneto is a self-contained electrical generator that uses magnets and coils to produce high-voltage electricity. This power is used to create the spark needed to ignite the air-fuel mixture inside the engine’s cylinders — which is what keeps the engine running.

Unlike modern cars that rely on batteries, magnetos are completely independent of the aircraft's electrical system, making them essential for reliability and safety in flight.

⚙️ How Do Magnetos Work?

Aircraft engines typically use two magnetos per engine — a left and a right — each connected to its own set of spark plugs. This dual system provides:

• ✅ Redundancy: If one magneto fails, the other can keep the engine running.

  
  

• ✅ Improved performance: Dual spark plugs create more efficient combustion.

  
  

• ✅ Increased safety: Independent operation ensures power generation even if the battery or alternator fails.

🛠️ Why Are Inspections Important?

Magnetos operate under high stress and high temperatures, making regular maintenance essential. A typical recommendation is a 500-hour inspection, where the magneto is disassembled, cleaned, checked for wear, and tested according to FAA guidelines and manufacturer manuals.

Failing to inspect and maintain your magnetos can lead to:

• Misfiring or hard starting

• Power loss during flight

• Non-compliance with Airworthiness Directives (ADs) or Service Bulletins (SBs)

🛩 Let’s Get You Flying Again

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📞 Need help diagnosing a magneto issue? Reach out today or visit: 👉 www.crossfiremagneto.com