What was found
SMOKE DETECTED IN CABIN ON LANDING. PERFORMED ENGINE RUN, PRESSURIZATION SYSTEM ON, CABIN HEAT FULL HOT, SUPPLEMENTAL HEATER ON, AND COMPLETED ENVIRONMENTAL SYSTEM TEST. NO SMOKE DETECTED, ALL SYSTEMS OPERATE NORMAL. VISUAL INSPECTION OF ENGINE DRIVEN COMPRESSOR OUTLET DUCT PERFORMED, NO OIL DETECTED AIRCRAFT RELEASED.