What was found
WITH APU RUNNING ON GROUND AFTER FLIGHT EMERGENCY LIGHTS IN CABIN AND OVER WING FLICKER OR GO OUT AND THEN COME BACK ON. COMPLIED WITH OPERATIONAL CHECKS OF THE EMERGENCY LIGHTING SYSTEM FOR 10 MINUTES. ATTEMPTED TO DUPLICATE ITEM WITH BATTERIES, APU, AND EXTERNAL POWER. NO FURTHER DEFECTS NOTED. COULD NOT DUPLICATE. TECHS WILL COMPLETE TC-FLT-33-1001 AS REQUESTED BY MCC. ALL WORK COMPLETED IN REFERENCE WITH MAINTENANCE MANUAL CHAPTER 33-50-00. COMPLIED WITH TC-FLT-33-1001 EMERGENCY LIGHTING POWER SUPPLY BATTERY EXERCISE PROCEDURE). NO DEFECTS NOTED. REFERENCE TC-FLT-33-1001 REV 2 DATED 20OCT2022.