As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE GENERATOR DROPPED OFF LINE DURING TAKEOFF ROLL. ABORTED TAKEOFF AND RETURNED TO GATE. FOUND VOLTAGE REGULATOR FAULT SET ON LEFT GENERATOR CONTROL UNIT. REPLACED THE LEFT VOLTAGE REGULATOR. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.