What was found
POP - INFLIGHT T2058 ENROUTE DFW TO SJU AT FL370, DETECTED SMOKE IN COCKPIT AND CABIN. SMOKE APPEARS TO COME FROM AIR CONDITIONING SYSTEM. COMPLETED EMERGENCY CHECKLIST AND LANDED WITHOUT INCIDENT AT POP. FOUND INSULATION BLANKET CONTACTING PNEUMATIC DUCTS AT AIR MIX MANIFOLD COMPARTMENT. REMOVED INSULATION BLANKET FROM CONTACT WITH PNEUMATIC DUCTS AT AIR MIX MANIFOLD COMPARTMENT. SYSTEM GROUND CHECKED NORMAL OPERATION.