As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
During preflight inspection for the flight from RDU to IAD, the crew reported that the rear emergency exit lights were inoperative. The aircraft was inspected, determined capable of safe flight, and ferried to IAD for maintenance. At IAd, maintenance personnel removed and replaced the aft emergency exit lighting battery pack. An operational check was satisfactory and the aircraft was returned to service.