As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY EXIT LIGHTS AT RT NR 4 DOOR & ALL ROWS AFT OF RT NR 4 DOOR CAME ON IN FLIGHT. CYCLED EMERGENCY LIGHTS SWITCH BUT NO HELP. AFTER LANDING ALL EMERGENCY LIGHTS CAME ON BUT WENT OUT WHEN EMERGENCY LIGHTS SWITCH WAS CYCLED. REPLACED BATTERY PACK AT M33401. SYSTEM GROUND CHECKED NORMAL.