What was found
AFT EMERGENCY LIGHT ISSUE. FA REPORTS AFT EMERGENCY EXIT LIGHTS + MID EMERG EXIT LIGHTS DO NOT ILLUMINATE DURING T/O BUT WORK ON LANDING -- CORRECTIVE ACTION --- AFTER TROUBLESHOOTING FOUND BATTERIES FOR EPSU WILL NOT HOLD A CHARGE. REPLACED BATTERIES OF THE EPSU AFT L/H EMER EXIT AND REPLACED EPSU UNIT ON R/H EMER EXIT PER AMM 33-51-33-080-001-A/ 400-001- /000-002-A /400-002-A OPS CHECKS GOOD. MID AND AFT CABIN EMERGENCY LIGHTS INOP ON T/O. AFTER TROUBLESHOOTING IT WAS DETERMINED THAT THE L1 DOOR ESCAPE SLIDE WAS AT FAULT. REMOVED AND REPLACED SLIDE ASSY AND ALL OPS CKS NML.