As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: EMERGENCY OVERHEAD LIGHT EXIT INOPERATIVE AT SEAT ROW 11. MAINTENANCE FOUND CONNECTOR ON EMERGENCY POWER SUPPLY UNIT 15WL LOOSE, SECURED CONNECTOR AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-00.