As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY LIGHTS TEST FAILED BATTERY, EMERGENCY POWER SUPPLY UNIT LEFT EXIT. DISCONNECTED AND RECONNECTED THE ELECTRICAL CONNECTOR ON EMERGENCY POWER SUPPLY UNIT L (16WL). INSTALL TEST GOOD PER A321 AMM 33-51-38-001-400-001-A.