As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT WITH NR 2 GEN. ON MEL, UNDER EXCITED SYSTEM 3 LIGHT ILLUMINATED & COULD NOT RESET. CLEARED MEL ON NR 2 GEN BY CHANGING GEN. FREQUENCY CONTROL PANEL. PLACED NR 3 SYSTEM ON MEL LATER CLEARED NR 3 MEL BY REPLACING GENERATOR CONTROL PANEL.