As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B-INSPECTION, FOUND BOTH AFT EMERGENCY WING LIGHTS INOPERATIVE. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 4 EMERGENCY POWER SUPPLY BATTERY AND CHARGER IAW W/C 33-700-19. THE OPS CHECKED GOOD IAW W/C 33-700-17. AIRCRAFT RETURNED TO SERVICE.