As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT CENTER IIDS DISPLAY BEGAN FLASHING. DC ELECTRICAL POWER PULSING ON NR 2 SYSTEM FROM 0 TO 11 AMPS OUTPUT ONLY (NORMALLY 140AMPS). ESS VOLTS LOW LIGHT ILLUMINATED ON SHORT FINAL. RADIOS WERE SWITCHED TO EMERGENCY SETTING SO COMMUNICATION WAS LOST.