As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DSM - FLIGHT 6008 OMA-ORD DIVERTED TO DSM DUE TO AN ELECTRICAL EMERGENCY ABNORMAL MESSAGE IN FLIGHT. THE AIRCRAFT LANDED AT DSM WITHOUT INCIDENT WHERE MAINTENANCE INSPECTED THE AIRCRAFT. REMOVED AND REPLACED THE NR 1 AND NR 2 MAIN BATTERY SELECTOR SWITCHES, OPERATIONALLY TESTED WITH NO DEFECTS. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.