What was found
BTV - FLT 4201 - CRWE REPORTED, 'LAV SMOKE INDICATION FOLLOWED BY BAG SMOKE IN INDICATION AFTER TAKEOFF, BOTH INDICATIONS EXTINGUISHED ON GROUND AFTER AREA RETURN. CAUSED OVERWEIGHT LANDING'. PRESENTLY MAINTENANCE IS TROUBLESHOOTING CAUSE OF INDICATIONS. PERFORMED OVERWEIGHT LANDING INSPECTION AND NO DEFECTS WERE NOTED. FOUND NR 1 ENGINE FAN SEAL LEAKING MAINTENANCE REMOVED AND REPLACED THE ENGINE OPS CHECKED AND LEAKED CHECKED ENGINE OK. RETURNED TO SERVICE. (M)