As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE THE EMERGENCY EXIT SIGN OVER THE SERVICE DOOR, EXIT SIGN AT SEAT 3BC, AND THE EXIT SIGN AT THE LEFT ESCAPE HATCH WERE ALL INOPERATIVE. MAINTENANCE INSPECTED AND REPLACED THE NR 3 EMERGENCY LIGHT INVERTER. OPERATIONAL CHECKS WERE GOOD.