As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OMA - FLT 4079 - DURING PREFLIGHT, CREW REPORTED THAT SOME CABIN FLOOR PROXIMITY EMERGENCY LIGHTS AFT OF OVERWING EXITS DID NOT ILLUMINATE. AIRCRAFT WAS FERRIED TO ORD FOR MAINTENANCE. MAINTENANCE REMOVED AND REPLACED THE NR 4 BATTERY AND INVERTER ASSEMBLY P/N 67343 IAW EMB MM. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)