What was found
CREW REPORTED THE AFT SECTION, ROW 12, FLOOR PROXIMITY, OVERHEAD EXIT LIGHT, AND SEVERAL FORWARD EMERGENCY LIGHTS TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE NR 2 POWER SUPPLY TO CORRECT THE PROBLEM. THE NR 1,3, AND 4 POWER SUPPLY UNITS AND ALL 4 BATTERIES WERE ALSO CHANGED AS A PRECAUTION. ALL WORK AND OPERATIONAL CHECKS WERE DONE IAW THE MM. (SW21200500265)