What was found
A3NB-33-3-6012 MAIN CABIN EMERGENCY LIGHT SYSTEM FAILS EPSU BATTERY FWD L33-51-38. (SDR) REF TO PEMCO/AIRBORNE NR 10261.0031. REMOVED AND REPLACED EPSU BATTERY PACK (10WL) (AERO DESIGN,INC), IAW A319 AMM 33-51-38-000-002-A, 33-51-38-400-002-A. OPERATIONS CHECK GOOD, IAW A319 AMM 33-51-00-710-001-A.