What was found
OPERATIONAL CHECK OF CABIN EMERGENCY LIGHTS {A3NB-33-3-6012} - EPSU BITE FAIL UNIT EMER R SEE PHOTO. LOCATION R/H OVERWING EXIT. SLAVED NEW EPSU AT R/H EMERGENCY OVERWING EXIT, REF AMM 33-51-38-400-001-A. NO GO. RE-INSTALLED EPSU REF AMM 33-51-38-400-001-A. SWAPPED BATTERY FROM L/H SIDE REF AMM 33-51-38-400-002-A. BITE TEST ON EPSU SYSTEM OK. RE-INSTALLED BATTERY TO L/H SIDE. INSTALLED NEW BATTERY REF AMM 33-51-38-400-002-A. EPSU BITE CHECKPARTS USED: 18-3351-3-0001,QTY :1