Anticept Posted August 4, 2016 Report Share Posted August 4, 2016 I'm tracing out an ignition system issue on one of our aircraft. Never seen this happen before. To be quite honest, I was lucky to find this. I was poking the spark plug with my ohmmeter to make sure they were correct (they should be around 3-5k ohms). I touched the ceramic barrel and saw it move... My gapping tool is this style. This allows me, without touching the center electrode or ceramic at all, to move the ground electrode. The only pressure on the center is from the sliding of the feeler gauges, that's it. CSIR report sent! EDIT: I just found another one like this??? I'm pulling all of them to check. This is odd. I replace the plugs every 200 hours, and these are about 150. EDIT 2: I found four of them like this out of the 8. I'm going to keep a close eye on things in the future to see what might be causing this. I just double checked with my gapper tool and the tooth doesn't come anywhere near the ceramic while gapping... Link to comment Share on other sites More sharing options...
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