As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE F/A REPORTED THE EMERGENCY LIGHTS STAYED ON DURING BATTERY SELECTION THROUGH ENTIRE FLIGHT ROW 14-17. THE ACFT WAS REMOVED FROM SERVICE. R & R THE POWER SUPPLY UNIT 73WL AND 62WL IAW JIC 33-51-21 RAI 10000. OPS CHECKED GOOD. THE ACFT WAS RETURNED TO SERVICE.