As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B INSPECTION FOUND THE FORWARD GROUND PROXIMITY EMERGENCY AISLE LIGHT INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 2 BATTERY POWER SUPPLY AND BATTERY PACK IAW WORK CARD 33-700-19. THE OPERATIONAL CHECK WAS GOOD, NO DEFECTS NOTED AT THIS TIME END. THE AIRCRAFT WAS RETURNED TO SERVICE.