As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION, THE EMERGENCY LIGHTS WERE FOUND TO BE INOPERATIVE AT ROWS THREE AND FOUR. MAINTENANCE REPLACED THE NUMBER 2 EMERGENCY LIGHT BATTERY. OPERATIONAL CHECKS FAILED. MAINTENANCE THEN REPLACED THE NUMBER 3 INVERTER. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED. ****THE FINAL CORRECTIVE ACTION IS BEING SUBMITTED AS A SUPPLEMENT TO THE ORIGINAL REPORT FILED ON 12/17/21. PART INFORMATION HAS ALSO BEEN UPDATED.