As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY EXIT SIGN AT SEAT 3B INOPERATIVE. TROUBLESHOT THE EMERGENCY EXIT SIGN IAW WIRING MANUAL 33-50-50-005. FOUND THE NR 3 INVERTER TO BE AT FAULT. REMOVED AND REPLACED THE INVERTER IAW AMM 33-50-11-000-801-A, AND 33-50-11-400-801-A, OPS CHECKED GOOD.