As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER TAKEOFF, GOT ECAM ELEC DC ESS BUS SHED. CLEARED ON ITS OWN. LATER FLIGHT ATTENDANT CALLS AND SAYS EMERGENCY EXIT LIGHTS ARE ON. TRIED TO RESET LIGHTS BUT COULD NOT. ACCOMPLISHED TSM TASKS 24-60-00-810-810-A AND 24-60-00-810-801-A WITH NO FAULTS FOUND. REPLACED 28 VDC SHED ESS BUS CONTACTOR 8PH AS PRECAUTIONARY PER AMM 24-62-55.