As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED A CIDS 1 MESSAGE. EMERGENCY LIGHT/EMERGENCY POWER SUPPLY UNIT 14WL MID R. CLASS 1. PERFORMED TROUBLESHOOTING IAW TSM 33-51-00-810-868A. LIGHTS WORK, FAULT STILL EXISTS. REPLACED THE EPSU 14WL IAW AMM 33-51-38. OPS CHECKED GOOD.