From time to time, upon landing, our Garim 430 reboots. We have been able to recreate it at the ramp by reducing power to idle. Battery always has enough charge. The aircraft has a generator and fairly new voltage regulator. Our guess is that some how the voltage regulator is not picking up the drop off of the generator when the RPM's are reduced. Any other thoughts? Any way to test the regulator without replacing it and seeing if the issue goes away?