As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW COMPLIED WITH AN EMERGENCY DESCENT DUE TO ELECTRICAL LOSS AFTER BATTERY EXCEEDANCE MESSAGE DISPLAYED. STARTER GENERATOR & GCU WERE REPLACED. PHASE 3 OVERSPEED INSPECTION WAS COMPLIED WITH & NO DEFECTS NOTED. THE ACFT WAS RETURNED TO SERVICE.