As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSTALLATION OF PASSENGER SEATS EMERGENCY LIGHTS FAILED SYSTEM TEST. MAINTENANCE REMOVED AND REPLACED THE LEFT AFT EMERGENCY POWER SUPPLY. ALSO REPLACED THE RT EMERGENCY DOOR POWER SUPPLY. WORK WAS PERFORMED IAW AIRBUS 320 AMM 33-51-38. OPERATIONAL TEST WERE GOOD IAW AIRBUS 320 AMM 33-51-00. VENDOR CONFIRMED FAULT. VENDOR REPLACED FUSE F2. VENDOR REPAIRED AND TESTED UNIT IAW CMM 33-51-12 REV 2