As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4084 - FLOOR EMERGENCY LIGHTING NEAR SEAT 12/13A FAILS TO ILUMINATE. MAINTENANCE REMOVED AND REPLACED NR 4 BATTERY AND CHARGER IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. REFERENCE SIMA2131. (M)