What was found
DURING MAINTENANCE INSPECTION FOUND THE LEFT EMERGENCY LIGHT INOPERABLE. THE CEILING LIGHT AT ROW 3 WAS ALSO INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE LEFT EMERGENCY LIGHT IAW EMB AMM 33-50-10 STEPS 2L1-4 AND 3K1-4. PART NUMBER 1317. REMOVED AND REPLACED THE CEILING EMERGENCY LIGHT AT ROW 3 IAW EMB AMM 33-50-08 STEPS 2J1-2 AND 3(I)1-2. PART NUMBER 1317. REMOVED AND REPLACED THE NR 1 BATTERY AND EMERGENCY POWER SUPPLY UNIT IAW WORK J CARD 33-700-19. THE OPERATIONAL CHECK WAS GOOD IAW WORK CARD 33-700-17. THE AIRCRAFT WAS RETURNED TO SERVICE.