What was found
DURING HEAVY MAINTENANCE: DURING AN OPERATIONAL TEST OF THE PASSENGER CREW DOOR SHOWED A FAULT MESSAGE BAT/ EPSU(14WL) IN THE PASSENGER CABIN; REF NR 2022-631496 WO 2022-410/1 REMOVED AND REPLACED BATTERY OF EPSU FIN 14WL IN PASSENGER CABIN IAW AMM 33-51-38-000-002-A. AND AMM 33-51-38-400-002-A AND PERFORMED AN OPERATIONAL CHECK OF THE EMERGENCY POWER SUPPLY UNIT BY BITE - CHECK IAW AMM 33-51-00-710-001. AND THE TEST IS GOOD.