What was found
LEFT AFT LAV SMOKE DETECTOR SOUNDED ON APPROACH FOLLOWED BY HOT SMELL FUMES IN CABIN AND COCKPIT. NO VISIBLE SMOKE AND SMELL DISSIPATED ON TAXI. CROSSFEEDS CLOSED, AIRFOIL ANTI ICE OFF, ENGINE ANTI ICE ON, APU OFF, LEFT TEMP CONTROL COLD, RIGHT TEMP CONTROL WARM. SMELL DESCRIBED AS PACK OVERHEAT. NO PACK TRIP. PERFORMED DUCT BURNOUT.