As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMER LIGHTS OFF POSITION, THEN BATTERIES OFF WITH GPU CONNECTED STRIP OF EMERGENCY LIGHTS ILLUMIMNATING AT ROWS 7 - 11 . F/A PANEL ALSO HAS EMERGENCY LIGHTS TURNED OFF. C/A-REPLACED BATTERY HOLDER ASSY #3 IAW AMM 33-50-04. OPS CHECK GOOD PER AMM 33-50-00.