As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PREFLIGHTING THE AIRCRAFT, IT WAS DISCOVERED THAT THE FLIGHT ATTENDANT HAD LEFT THE EMERGENCY LIGHTING SWITCH ON. ALL OF THE EMERGENCY LIGHTS WERE NOT ILLUMINATING. THE AIRCRAFT WAS FERRIED TO PIT. MAINTENANCE INSPECTED AND REPLACED THE EMERGENCY BATTERIES AT THE 4LK, 5LK, 6LK, AND THE 7LK POSITIONS IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-51-01. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.