What was found
DURING CRUISE FLIGHT AT 12,000 PILOT NOTICED HAZE & SMOKE WAS PRESENT IN COCKPIT ALONG WITH SMOKE ODOR. PILOT DONNED OXYGEN MASK & SMOKE GOGGLES IAW GOM PROCEDURES. PILOT FOLLOWING PILOT QRH TURNED OFF BLEED AIR, DUMPED CABIN PRESSURIZATION & TURNED FAN ON OVERRIDE IN THE APPROPRIATE ORDER. NOTED ACTIONS SEEM TO SOLVE THE ISSUE, PILOT DECIDED TO DIVERT TO THE NEAREST SUITABLE AIRPORT. PILOT LANDED WITHOUT FURTHER INCIDENT. TROUBLESHOOTING REVEALED LOOSE BLEED AIR DUCT IN CABIN UNDER FLOOR, BLEED AIR DUCT WAS BLOWING HOT AIR ON CARGO BOXES & LABELS CAUSING SMOKE IN COCKPIT. INSPECTED SURROUNDING AREA FOR DAMAGE & SECURED DUCT & PERFORMED ENG RUNNING OPERATIONAL CHECK OF SYSTEM. OPERATIONAL CHECKS WERE NORMAL.