As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN THE VENTRAL STAIRWAY WERE INOPERATIVE. MAINTENANCE ATTEMPTED CORRECTION BY RELAMPING BUT ENDED UP REPLACING THE BATTERIES IN THE BATTERY PACK B5-28. THE LIGHTS RETURNED TO AN OPERATIONAL CONDITION. (A)