As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING PS CHECK, EMERGENCY LIGHTS ON OVERHEAD CEILING PANELS, FROM STATION 871.5 TO STATION 1197+66, LEFT AISLE FAILED OT ILLUMINATE DURING VISUAL TEST. MAINTENANCE REPLACED EMERGENCY LIGHTING BATTERY PER STANDARD PRACTICES AND PERFORMED SATISFACTORY OPERATIONAL CHECK.