As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU - FLT 3956 - CREW REPORTED THE FORWARD AND AFT EMERGENCY LIGHTS TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE FORWARD BATTERY PACK AND RECONNECTED THE BATTERY PACK IN THE AFT POWER SUPPLY UNIT. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)