As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLATION TEST - SEAT CENTER EMERGENCY LIGHTS FROM 33L/R TO 38L/R DON'T WORK, WHEN "EMERGENCY LIGHT" SWITCH IS TURN ON. REMOVED AND REPLACED WCU26 AND WBU26 IAW AMM B787-A-33-51-07-01B-720A-A. EMERGENCY FLOOR LIGHTING AT ROWS 33 TO 38 OPS CHECK GOOD.