As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A LINE MAINTENANCE CHECK, THE LEFT HAND OVERWING EMERGENCY EXIT SIGNS WERE FOUND TO FLASH THEN EXTINGUISH AFTER 30 SECONDS. THE EMERGENCY EXIT SIGNS ON THE LEFT HAND SIDE BATTERY CARTRIDGES WERE REMOVED AND REPLACED. OPERATIONAL CHECK IS GOOD.