What was found
INTERIOR EMER LIGHTS ABOVE OVERWING EXIT AND SEVERAL ROWS AFT OF 20ABC ILLUMINATES FOR A SHORT PERIOD AND THEN DIES OUT. REMOVED DADO PANELS FOR BATTERY PACKS AT ROWS 20ABC/EF AND 27ABC/DEF FOR T/S. REPLACED CHARGER AND BATTERY PACK, NO HELP. UPON FURTHER TROUBLESHOOTING, FOUND RED EMERGENCY LIGHT ON SEAT 20C MISSING LENS AND BOTH BULBS DAMAGED CAUSING SHORT TO CIRCUIT, REPLACED LAMP ASSEMBLY IAW AMM 33-51-11. OPS CHECK GOOD, OK TO COMTNUE SERVICE.