As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PASSING 13,500 BAT DISCHARGE LIGHT ILLUMINATED . AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO ORF WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. REPLACED BATTERY CHARGER PER AMM 24-31-21,(AALA202007199006) REPLACED STATIC INVERTER PER AMM 24-34-21, REPLACED BATTERY PER AMM 24-31-11, AND REPLACED STANDBY POWER CONTOL UNIT(SPCU) PER AMM 24-34-11. A SATISFACTORY OPERATIONAL CHECK OF ALL REPLACED ITEMS WAS ACCOMPLISHED.