As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, CREW NOTICED 90 PERCENT LOAD ON LEFT GENERATOR AND RIGHT GENERATOR LOAD ZERO PERCENT. TRIED TO RESET RIGHT GENERATOR, BUT COULD NOT RESET. TURNED OFF LEFT GENERATOR AND AIRCRAFT GEN-TIES OPENED AND BATTERY BUS TIES OPENED. COULD NOT RESET LEFT GENERATOR. RETURNED TO HANGAR. SUBMITTER SUSPECTED RIGHT START RELAY CONTACTS WELDED CLOSED. REPLACED DC POWER PANEL AND SYSTEMS RETURNED TO NORMAL.