As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY EXIT AISLE OVERHEAD LIGHTS INOP (ROW 11 AND 15). R & R LIGHTS, NO HELP. CHECKED AND CONFIRMED ALL CONNECTIONS ARE SECURE. ON MEL WILL REQUIRE FURTHER TROUBLESHOOTING. REMOVED AND REPLACED BATTERY PACK ASSY IAW AMM 33-51 ALL CKD GOOD. (LOG 4799754 - AIRCRAFT WAS GROUNDED).