jjconstant
Well Known Member
I have a question about the best methodical touble shooting procedure for a ignition system failure. I didn't have time to decowl and start the process so I thought I would put the request out there before I get back to the hangar.
The current ignition is dual PMags, engine is an IO-360 with Whirlwind prop, Grand Rapids EIS driving a Horizon EFIS. Prop has been dynamically balanced.
I started the engine and my EIS rpm showed 0. Engine was running smoothly at approx 1000rpm. I have verified previously that the PMags would keep the engine running down to approximately 800rpm before the rpm was too low to keep the mags energized. I cycled the switchable circuit breakers for each mag and then did an idle rpm mag check. During the left mag check I heard no discernable difference in rpm. Right mag check would kill the engine.
So the symptoms are: 0 rpm indication on EIS engine monitor, non-functioning Right mag on approx 1000 rpm mag test. When I decowl the engine what would be the best order to test/look at things?
I'm a bit spooked because the last time something like this happened I had to pull the left mag on my Lasar installation only to find the gear shaft sheared
. That prompted the change to PMags...
Thanks.
Jeremy Constant
The current ignition is dual PMags, engine is an IO-360 with Whirlwind prop, Grand Rapids EIS driving a Horizon EFIS. Prop has been dynamically balanced.
I started the engine and my EIS rpm showed 0. Engine was running smoothly at approx 1000rpm. I have verified previously that the PMags would keep the engine running down to approximately 800rpm before the rpm was too low to keep the mags energized. I cycled the switchable circuit breakers for each mag and then did an idle rpm mag check. During the left mag check I heard no discernable difference in rpm. Right mag check would kill the engine.
So the symptoms are: 0 rpm indication on EIS engine monitor, non-functioning Right mag on approx 1000 rpm mag test. When I decowl the engine what would be the best order to test/look at things?
I'm a bit spooked because the last time something like this happened I had to pull the left mag on my Lasar installation only to find the gear shaft sheared
Thanks.
Jeremy Constant