As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION FOUND THE EXTERIOR WING LIGHTS INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 4 POWER SUPPL. ALSO REMOVED AND REPLACED NR 4 BATTERY IAW W/CD 33-700-19. THE AIRCRAFT WAS RETURNED TO SERVICE.