What was found
FLIGHT CREW EXPERIENCED VOLTAGE SPIKES, TURNED OFF ALL GENERATORS, STILL HAD VOLTAGE SPIKES AND THE TURNED OFF ALL ELECTRICAL SYS.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT CREW EXPERIENCED VOLTAGE SPIKES, TURNED OFF ALL GENERATORS, STILL HAD VOLTAGE SPIKES AND THE TURNED OFF ALL ELECTRICAL SYS.