Hey - new intermittent issue developed today.
When I was cruising at high power settings, the RPM started flicking from say 2300 to some fictitious higher value like 2560 for a second or a few seconds, and then back to the right value for just a moment, and so on.
Engine is an IO-540 with dual Bendix S6 mags, with L and R P-lead pick-ups at the ignition switich with the 30kOhm resistors wired in-line with each RPM pick-up, right at the P-lead.
I have had no issues with this so far. It only seemed to happen at high power settings. In particular, running over-square, but I doubt if that is related.
It has just come off a 100hr inspection, so the P-lead to magneto connections have been removed / reinstated once, some wires have been handled, and the plugs have been cleaned properly / tested etc.
Any suggestions?
Oh - EMS is D120, all Dynon harnesses/parts.
When I was cruising at high power settings, the RPM started flicking from say 2300 to some fictitious higher value like 2560 for a second or a few seconds, and then back to the right value for just a moment, and so on.
Engine is an IO-540 with dual Bendix S6 mags, with L and R P-lead pick-ups at the ignition switich with the 30kOhm resistors wired in-line with each RPM pick-up, right at the P-lead.
I have had no issues with this so far. It only seemed to happen at high power settings. In particular, running over-square, but I doubt if that is related.
It has just come off a 100hr inspection, so the P-lead to magneto connections have been removed / reinstated once, some wires have been handled, and the plugs have been cleaned properly / tested etc.
Any suggestions?
Oh - EMS is D120, all Dynon harnesses/parts.