As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTING FAILS SYSTEM CHECK - INDICATES EPSU 10WL FAILURE. FOUND SEAT ROW 1L EMERGENCY LIGHT WIRING SHORTED. REMOVED AND REPLACED TWO DEFECTIVE SPLICES AT ROW 1L. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT (EPSU) AND BATTERY IAW AIRBUS MAINTENANCE MANUAL 33-51-38.