As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7801, ENROUTE HII-PHX: DISCREPANCY: GENERATOR OFF LIGHT ILLUMINATED INBOUND TO PHX . WOULD NOT RESET. DECLARED AN EMERGENCY. CONTINUED FLIGHT USING STANDBY POWER. LANDED WITH NO FURTHER ISSUES. CORRECTIVE ACTION: MAINTENANCE REPLACED THE GENERATOR CONTROL UNIT. OPS CHECK GOOD.