What was found
EPSU BATTERY AFT L FAILS DURING OPERATIONAL CHECK OF EMERGENCY POWER SUPPLY UNITS BY BITE CHECK. SUPPORT TASK NSA EMX N/R 00009. REMOVED PART NO AD 3214-31 SN 17434 AFT LEFT EMERGENCY POWER SUPPLY UNIT 13WL IAW AMM 33-51-38-000-002. DISPLACED LOWER PSU FOR ACCESS TO EPSU 13WL IAW A319 AMM AFT LEFT EMERGENCY POWER SUPPLY UNIT 13WL IAW AMM NOTED. REMOVED PART IAW 33-51-38-400-002-A. LIFTED AND ENGAGED PSU PANEL 13WL. LEFT EMERGENCY POWER SUPPLY UNIT 13WL IAW AMM AMM 35-21-41-400-001-A. PERFORMED OPS CHECK IAW AMM 33-51-38-000-002. INSTALLED PART NUMBER AD-3214-31 SN 293714 33-51-00-710-001-A AND A319 AMM 33-51-00-710-006-A. NO ISSUES INSPECTION COMPLETE