As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: MAINTENANCE MESSAGE 33-11723 OCCURRED DURING GROUND TEST. LT AND RT AFT CENTER AREA BUSINESS CLASS SEAT EMERGENCY LIGHTS EFFECTED. REMOVED AND REPLACED WELS CONTROL UNIT IAW AMM 33-51-07, CLEANED CONNECTOR AT WCU 23 AND CLEANED CONTACTS BETWEEN WCU 23 AND WBU 23 IAW SWPM 20-60-01. SOFTWARE LOADED TO WCU 23 AND WBU 23 IAW AMM 33-51-07. FAULT CLEARED.