What was found
REPORTED SMOKE IN COCKPIT UPON TAKEOFF. A/C RETURNED IMMEDIATELY AND PERFORMED NORMAL LANDING. INSP REVEALED A CRACKED V-BRAND CLAMP CONNECTING BLEED AIR SUPPLY LINES IN RT WING ROOT AREA ADJACENT TO SURFACE DEICE PRESSURE REGULATORS. SMOKE WAS DETERMINED TO ORIGINATE FROM A PLASTIC/VINYL HOSE INSIDE CABIN ADJACENT TO FUSELAGE SKIN WHICH HAD BURNED AND MELTED. SUSPECT HEAT FROM BLEED AIR SUPPLY LINES CAUSED LOCAL AREA TO CONDUCT HEAT THROUGH THE SKIN TO THE EXTENT NECESSARY TO MELT THE TUBING. INSP REVEALED NO OTHER APPARENT HEAT RELATED DAMAGE. SUBMITTER NOTES THAT THE CRACK IN THE V-BAND CLAMP OCCURRED AT JUNCTION OF BARREL BOLT, AND NO SAFETY DEVICES WERE INCORPORATED ON ANY OF CLAMPS IN AREA.