What was found
AIR TURN BACK DUE TO FUMES AND SMOKE IN CABIN. ACCOMPLISHED VISUAL INSPECTION OF COCKPIT, CABIN AND E AND E COMPARTMENTS, NO DEECTS NOTED. ACCOMPLISHED VISUAL CHECK OF LT AND RT ENGINES AND APU. NO DEFECTS NOTED. ACCOMPLISHED FIM 71-08, TREE 814, UP TO STEP D. NO DEFECTS NOTED. RAN ENGINES AND APU WITH RT PACK OFF. NO DEFECTS NOTED. ALL EIGHT EMERGENCY ESCAPE SLIDES WERE DEPLOYED.