What was found
AIR TURNBACK TO RSW DUE TO F/A REPORTED SMOKE IN AFT CABIN AND FLIGHT CREW SENSED BURNING SMELL FROM DUCTING. LANDING WAS UNEVENTFUL. MCO MTC TO DRIVE OVER AND WORK. NO ABNORMAL INDICATIONS FROM ENGINES OR PACKS. CHECKED ALL PANELS FOR EVIDENCE OF SMOKE OR DAMAGE, NONE FOUND. PRESSURIZED AIRCRAFT AND RAN BOTH ENG, ALL FOUND OK. REPLACED BOTH COALESCER BAGS AND CHECKED GASPAR FAN. CHECKS GOOD.