As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, POWER WAS LOST TO AVIONICS CAUSING AMP GAUGE FLUCTUATIONS. UPON INSPECTION WIRES WERE FOUND TO BE LOOSE ON MASTER SWITCH FOR AVIONICS AND SOME ARCING WAS NOTICED. REPLACED TERMINAL ENDS AND SCREWS AND LOCKWASHERS. OPS CHECKED SYSTEM.