As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURN BACK - FLT 0496 - ON CLIMB OUT OF PHX EN ROUTE FOR DEN THE FIRST OFFICERS FORWARD PANEL LIGHTS AND CENTER CONSOLE LIGHTS DIMMED, THEN HEARD TRANSFORMER RECTIFIER CIRCUIT BREAKERS POP, AT THIS TIME THE NR 2 GENERATOR DROPPED OFF LINE. APU CONNECTED TO NR 2 GENERATOR BUS OK, TURNED BACK TO PHX AND LANDED WITHOUT FURTHER EVENT. MAINTENANCE TROUBLESHOT AND FOUND THE NR 2 GENERATOR FEEDER CABLE BADLY BURNED. REMOVED AND REPLACED NR 2 GENERATOR FEEDER CABLE PER BMM 20-61-19.