What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT EXT LOAD AFT LEFT AND EMERGENCY POWER SUPPLY UNIT COMMUNICATION FORWARD LEFT IS SHOWN. PERFORMED TROUBLE SHOOTING PROCEDURE PER TSM 33-51-00-810-808-A, AND REPLACED EMERGENCY POWER SUPPLY UNIT FIN 10WL (AALA202110241758), EMERGENCY POWER SUPPLY UNIT FIN 13WL (AALA202110257875) PER AMM 33-51-38-400-001-A, REPLACED LEFT ESCAPE-SLIDE PACK ASSEMBLY FIN 7502MM PER AMM 25-62-44-400-006-A.