As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 307 - LAS - EEL - EMERGENCY POWER SUPPLY FOR EMERGENCY LIGHTS MID RT CABIN, BASE MISSING FASTENER FOR BATTERY. MAINTENANCE REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT MID RT CABIN IAW AIRBUS MAINTENANCE MANUAL 33-51-38-000-001.