As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GENERATOR FAILED IN FLIGHT DURING APPROACH. THE LEFT IDG WAS ON DEFERRAL, THE AIRCRAFT DECLARED AN EMERGENCY BECAUSE THE AIRCRAFT ONLY HAD (1) OPERATING ELECTRICAL POWER SOURCE. AIRCRAFT LANDED AND WAS GROUNDED BY MAINTENANCE. MAINTENANCE REPLACED THE APU GENERATOR CONTROL PANEL. AIRCRAFT WAS RELEASED.