Hey David,

I had a very similar problem only more intermittent.  The ground wire to the main alternator broke as it entered the connector at the alternator.  It looked OK but was broken internally, probably due to the air blast from the inlet.  That took a while to find.  I replaced it with a much heavier wire. 

Steve Colwell  Legacy

Any ideas about what would cause my amperage to start fluctuating wildly about 5 minutes into a flight?

It starts out fine after takeoff at 15 amps and then goes to -50 amps for 30 seconds, and then gyrates between 5 amps and -50 amps for a minute and then goes back to normal. It repeats this sequence every 5 minutes.

My fuel gages also go down to zero during this episode and then back to normal.

Is my B&C LR3C Linear Regulator going bad?

(I'm getting these readings from my Grand Rapids EIS engine monitor. It's hooked up to a Grand Rapids EFIS Sport.)

Thanks for the help!

David T.
Legacy RG