As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE SEAT EMERGENCY LIGHT AT ROW 15, 19 AND 23 FOUND INOPERATIVE. PERFORMED EPSU BITE TEST ON 11WL. GOT A SYSTEM FAULT INDICATION. R & R EPSU AND BATTERY ON 11WL. ALL SEATS EMERGENCY LIGHTS, OPS CHECK NORMAL IAW AMM 33-51-38.