What was found
AIR TURN BACK. FLIGHT CREW REPORTED SMOKE IN CABIN, LT WING/BODY OVERHEAT ILLUMINATED AND RT PACK TRIPPED OFF. DECLARED AN EMERGENCY AND RETURNED TO DEN. AIRCRAFT LANDED WITHOUT INCIDENT. ON APPROACH, AILERONS WERE DIFFICULT TO MOVE AND HAD A SHUDDER BELOW 180 KNOTS. REPOSITIONED DETECTION LINE FOUND TOUCHING BLEED DUCT IN FWD LT AFT CARGO COMPARTMENT. PLACARDED RT PACK PER MEL 21-1. PERFORMED A FLIGHT CONTROL MOVEMENT CHECK WITH NO DISCREPANCIES NOTED. PERFORMED VISUAL INSPECTION OF AILERON CONTROL SYSTEM, WITH NO DEFECTS NOTED. COMPLIED WITH FLAP MOVEMENT CHECK, WITH NO DEFECTS NOTED.