As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AIR RETURNED TO MIA ACCOUNT GENERATOR ISSUE/STANDBY POWER LIGHT ILLUMINATED MESSAGE. EMERGENCY WAS DECLARED. FLIGHT WAS OVERWEIGHT FOR LANDING. ACCOMPLISHED FIN CHECKS IAW 24-34-00. REPLACED STANDBY POWER CONTROL UNIT PER AMM 24-34-11.