As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE VISIT LEFT AFT FUSELAGE EMERGENCY LIGHTS FOUND INOPERATIVE. SYSTEM WAS TROUBLESHOT AND LEFT EMERGENCY LIGHTING POWER SUPPLY BOX FOUND AT FAULT. BOX WAS REPLACED. OPERATIONAL CHECK WAS GOOD. AIRCRAFT RETURNED TO SERVICE.