As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 716 LAN/SFB - CABIN CREW REPORTED THAT THE FORWARD CABIN EXIT SIGNS FLICKERED ON AND OFF THROUGHOUT THE FLT. SANFORD MAINTENANCE REMOVED AND REPLACED THE APPROPRIATE POWER SUPPLY BATTERY PACK (POSITION AND PART NUMBER NOT REPORTED). A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-53-00. THE AIRPLANE HAS RETURNED TO SERVICE.