As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 GENERATOR OFF LIGHT ILLUMINATED AND NR 1 GENERATOR DROPPED OFF LINE. ON TAKEOFF ROLL, THE NR 1 GENERATOR OFF LIGHT ILLUMINATED AGAIN. RETURNED TO THE GATE. MAINTENANCE REPLACED THE NR 1 GENERATOR CONTROL, OPERATIONAL CHECK NORMAL.