markejackson02 Posted March 10, 2011 Report Posted March 10, 2011 I have had intermittent mag problems for a couple months now. Got to the point we could start the plane then the left mag would fail after a little while. The mechanic thought coil or condensor. It turned out that the bushing through the center of the distributor block was loose. Why would that cause the mag to fail, especially only after it was warm? I could see the coil or condensor failing after they got hot. Quote
airfoill Posted March 16, 2011 Report Posted March 16, 2011 Quote: markejackson02 I have had intermittent mag problems for a couple months now. Quote
Kwixdraw Posted March 19, 2011 Report Posted March 19, 2011 The reason for your intermittant mag problem is probably internal arcing on the distributor block. You didn't say what kind of mags you have but basically the center bushing being loose suggests that the insulating packing in there is bad and allowing the spark to jump to ground internally. Mags have to be pretty much perfect to do what they must. Quote
rbridges Posted March 19, 2011 Report Posted March 19, 2011 maybe not applicable to your situation, but the current MAPA has an article about mag problems. Quote
richardheitzman Posted March 20, 2011 Report Posted March 20, 2011 You didn't say how many hours on the mag. Recommended 500 hour overhauls. They do wear out. Don't try and troubleshoot unless they are "new". There are many ways they fail and a couple have been mentioned. Quote
Shadrach Posted March 20, 2011 Report Posted March 20, 2011 Quote: markejackson02 I have had intermittent mag problems for a couple months now. Got to the point we could start the plane then the left mag would fail after a little while. The mechanic thought coil or condensor. It turned out that the bushing through the center of the distributor block was loose. Why would that cause the mag to fail, especially only after it was warm? I could see the coil or condensor failing after they got hot. Quote
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