What was found
DURING EMERGENCY LIGHTS, OPS TEST WITH THE TEST SWITCHES, ALL EMERGENCY LIGHTS SUPPLIED BY POWER SUPPLY M33404 FAILED AFTER APPROXIMATELY 2 MINUTES OF OPS. SUSPECT BATTERY PACK AT M33404 OVER 3R DOOR. REPLACED THE POWER SUPPLY CHARGER ASSY IAW AMM 33-51-06-960-803 AND PERFORMED POWER SUPPLY, BATTERY PACK DEEP-CYCLE PROCEDURE IAW TASK 33-51-06-600-801, CONDITION SAME, REPLACED POWER SUPPY ASSY IAW AMM 33-51-06-960-803, TESTED OK.