What was found
MULTIPLE FWD GALLEY AREA AND FORWARD PASSENGER AREA EMERGENCY LIGHTS INOP. DURING TROUBLESHOOTING, BORROWED KNOWN GOOD BATTERY CHARGER ASSY FROM 15153. ONCE KNOWN GOOD BATTERY CHARGER ASSY WAS INSTALLED IN THE #1 POSITION (CRJ 900 AMM 33-51-17-400--802-A02), ALL EMERGENCY LIGHTS FOR BATTERY #1 WORKED. REMOVED BORROWED CHARGER ASSY (CRJ 900 AMM 33-51-17-000-802-A02) REPLACEMENT OF THE BATTERY CHARGER ASSY FOR BATTERY #1 POSITION REQUIRED. REMOVED FAULTY EMERGENCY POWER SUPPLY UNIT IAW AMM 33-51-17-000-802-A02 AND INSTALLED SERVICEABLE EMERGENCY POWER SUPPLY UNIT IAW AMM 33-51-17-400-802-A02. OPS TESTS PASSED. REMOVED FAULTY EMERGENCY POWER SUPPLY UNIT IAW AMM 33-51-17-- 000-802-A02 AND INSTALLED SERVICEABLE EMERGENCY POWER SUPPLY UNIT IAW AMM 33-51-17-400-802-A02.