What was found
SMOKE IN COCKPIT ON TAKEOFF. LOST TOP ENGINE EICAS DISPLAY AND LEFT FMC. EMERGENCY RETURN TO OVERWIEGHT LANDING. CHECKED MAIN CARGO FOR SMOKE/FIRE, NONE FOUND. CHECKED MAIN ELECTRICAL COMPARTMENT FOR SMOKE/FIRE, NONE FOUND. CHECKED CAPTAINS AND COPILOTS FMC CDU. FOUND CAPTAINS CDU BURNED. REPLACED IAW 34-61-02. CHECKED OK. REPLACED UPPER EICAS SCREEN IAW 31-40-01, CHECKED OK. RAN BOTH ENGINES SEPARATELY IAW AMM CHECKING FOR EVIDENCE OF SMOKE, CHECKED ALL COCKPIT INSTRUMENTS IAW AMM 20-60-04 ALL CHECKED OK. OVERWEIGHT INSPECTION PERFORMED PHASE I OPTION A NO DEFECTS NOTED IAW 5-51-35 PG 202.