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Magnetos with serial number after June 2015 need to be overhauled “only“ after 12 years in service. Older magnetos must be overhauled after 4 years in service. In case of factory overhauled magnetos, the serial number stays the same, therefore this change only applies for factory new TCM magnetos.
Magnetos must be overhauled after a lightning strike on the aircraft, a sudden stoppage, prop strike, overspeed or immersion. TCM Continental also specify a 4 year calendar time overhaul for Bendix magnetos irrespective of operational time.
There are two ways to tell if your magnetos require overhaul or repair: by identifying mag-related problems with engine performance, and by diagnosing damage and wear through routine maintenance and inspection. How to Know When Your Magnetos Are Performing Poorly.
When do I have to Overhaul my Bendix Magnetos? The Bendix Magneto overhaul manual states: “Magnetos are subject to the same environmental conditions and wear as the engine and must be overhauled when the engine is overhauled.
Aircraft magneto overhaul simply involves disassembling the magneto and replacing parts as necessary, whereas a magneto must be brought to factory-new standards as determined by the manufacturer in order to be considered factory overhauled.
Jun 7, 2017 · The correct magneto configuration should be verified against the approved technical data. Their essential simplicity means magnetos can be overhauled and refurbished many times but some of the components have inherently limited lives.
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Jan 20, 2022 · A permanent magnet in a magneto isn’t permanent, just as the hairstyle labeled a permanent doesn’t last forever. However, the magnet does retain its magnetism for years, and is re-magnetized when the mag is opened for overhaul or repair. That’s one reason a mag won’t last until engine TBO.
