As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED WHEN EMERGENCY LIGHTS ARE TURNED OFF WITH BATTRIES ON. CENTER FLOOR STRIP AND WITH BATTERIES OFF AS WELL LIGHTS ONLY, GO OFF WITH EMERGENCY LIGHTS IN ARM. THE ACFT WAS REMOVED FROM SERVICE. R & R THE NR 3 EMERGENCY BATTERY AND POWER SUPPLY IAW AMM 33-50-04. THE OPS CHECK WAS GOOD IAW AMM 33-50-00. THE ACFT WAS RETURNED TO SERVICE.