As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THE EMERGENCY LIGHTING BREAKER POPS OUT. DURING TROUBLESHOOTING MAINTENANCE FOUND THE NR 1 EMERGENCY BATTERY WOULD NOT TEST. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)