As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING T/C 78233001 FOUND LEFTY AND RIGHT OVERWING ILLUMINATION LIGHTS TO BE OUT. GROUNDED - YES. REPLACED EMERGENCY LIGHT POWER SUPPLY BATTERY PACK ASSY M161 REF BOEING AMM TASK 33-51-06-960-805. OP TEST GOOD. EMERGENCY LIGHTS OPERATES AS REQUIRED. NO FURTHER DEFECTS.