What was found
AIRCRAFT WAS GROUNDED: FORWARD LEFT SLIDE IS FAILING THE EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. MAINTENANCE REPLACED THE L1 DOOR SLIDE ASSEMBLY PER TASK CARD 26L00025010 (AALA202507025869). IN ADDITION MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AALA202507020810) AND THE EMERGENCY POWER SUPPLY UNIT BATTERIES FOR POSITIONS 10WL (AALA202507027102), 11WL (AALA202507029906), 12WL (AALA202507023178) AND 13WL (AALA202507022962) PER AMM 33-51-38. A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY POWER SUPPLY SYSTEM WAS ACCOMPLISHED WITH NO FAULTS NOTED.