As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: EMERGENCY LIGHTING ON SEATS AT ROWS 13 TO 25 BOTH AISLES, RIGHT HAND CEILING EMERGENCY LIGHTS ROWS 17 TO 25, AND DOOR 3R OVERHEAD EMERGENCY LIGHTS INOPERATIVE. REPLACED EMERGENCY LIGHTING BATTERY PACK POWER SUPPLY M33404 BATTERY PACK PER AMM 33-51-06.