As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION, THE AFT CABIN EMERGENCY EXIT SIGN AND LT AND RT OVERWING EMERGENCY EXIT LIGHTS WOULD NOT ILLUMINATE. MX R & R THE NR 4 EMERGENCY LIGHT BATTERY PACK WITH OPS CHECK GOOD. ACFT WAS APPROVED FOR RETURN TO SERVICE.