As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTING SYSTEM OPERATIONAL CHECK. FOUND EMERGENCY AISLE LIGHT AT ROWS 5DEF, 9DEF AND 14DEF. FOLLOWED FIM 33-50 TASK 801, FOUND BATTERY PACK DEFECTIVE. REPLACED BATTERY BACK (M1676) IN REFERENCE AMM 33-51-06-960-805. OPS CHECK GOOD.