What was found
DURING EMERGENCY LIGHT TEST, EXTERIOR LOAD AFT AND INTERIOR LOAD AFT 13WLP LIGHTS FLASHING. REPLACED EMERGENCY LIGHTS 32WL, 90WL7, 90WL8, 44WL AND EMERGENCY POWER SUPPLY UNIT 13WL PER AMM 33-51-00. THIS SDR IS FOR EMERGENCY POWER SUPPLY UNIT 13WL.