SF340 EXPERIENCES INFLT SMOKE IN COCKPIT AND CABIN RESULTING FROM A CARGO COMPARTMENT FIRE WARNING. DECLARE EMER AND DIVERT FOR A SAFE AND SUCCESSFUL LNDG AND EVAC.

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AT APPROX XA10; A CARGO SMOKE WARNING OCCURRED. AFTER IDENTING THE MESSAGE; THE CAPT CALLED FOR CARGO SMOKE MEMORY ITEMS PER AOM PROCS. THE CARGO EXTINGUISHER WAS ACTIVATED BY THE CAPT AND THE FO COMPLETED THE QRH ITEMS THEN CALLED THE FLT ATTENDANT VIA INTERPHONE TO CHK THE AFT CABIN. THE FLT ATTENDANT RETURNED SHORTLY AFTER; AND CLAIMED THAT THERE WAS SMOKE AROUND HER JUMPSEAT. DURING THIS CONVERSATION WITH THE FO; THE CAPT DECLARED AN EMER. THE CREW WAS ADVISED BY ATC TO SQUAWK 7500 FOR IDENT. AT THIS TIME; THE FO NOTICES SMOKE IN THE COCKPIT FLOOR AND INITIATES EMER DSCNT AND TURNS TOWARD APPROX 030 DEG BEARING. SMOKE VERIFIED BY ADDITIONAL CREW MEMBER. CAPT THEN MAKES A PA TO INFORM PAX OF SITUATION AND BRIEFS THE FLT ATTENDANT OF SITUATION AND ADVISES HER TO PREPARE FOR POSSIBLE EMER EVAC. CAPT NOTICES INCREASE IN COCKPIT SMOKE AT ABOUT 5000 FT ON R BASE TO RWY 6. AT THIS TIME; DUE TO A CONTINUOUS CARGO SMOKE MESSAGE AND INCREASE IN SMOKE; THE DECISION WAS MADE BY THE CREW TO EXPEDITE LNDG BY INCREASING AIRSPD. AT 3000 FT THE FO DUMPS THE CABIN TO CLR COCKPIT SMOKE AND ADVISED ADDITIONAL CREW MEMBER TO VENT COCKPIT VIA OVERHEAD ESCAPE HATCH. TWR CLRS THE ACFT TO LAND RWY 24. THE CAPT THEN ADVISES THAT HE WOULD LIKE RWY 6 TO EXPEDITE LNDG AS WINDS WERE RPTED 280 DEGS AT 8 KTS. THE TWR RECLRED ACFT TO LAND RWY 6. CFR WAS REQUESTED TO STAND BY BY THE CAPT. THE SMOKE BEGINS TO CLR AND THE FO SLOWS TO GEAR AND FLAP SPD. FO LOWERS GEAR AND THE CAPT SELECTS FLAPS ON SPD. ON ROLLOUT; SMOKE IS ALMOST GONE. THE ACFT IS PARKED ON THE RWY AND SECURED PER PROCS. DUE TO THE FACT THAT EVIDENCE OF SMOKE AND FIRE IS GONE; THE CAPT THEN ORDERS AN ORDERLY DEPLANEMENT THROUGH THE MAIN CABIN DOOR VIA USE OF THE STAIRS. AT THIS TIME; THE ADDITIONAL CREW MEMBER IS ORDERED TO LEAVE FIRST AND THE PAX TO FOLLOW ALONG WITH THE FLT ATTENDANT. PAX ESCORTED TO SAFE POS AT RWY EDGE AND SUPERVISED BY ADDITIONAL CREW MEMBER AND FLT ATTENDANT. CAPT AND FO SECURE ACFT AND CAPT CHKS CABIN AREA AND CONFIRMS CLR. CARGO SMOKE ANNUNCIATOR REMAINED ILLUMINATED UNTIL ALL PWR REMOVED FROM ACFT AND AT NO TIME DURING THE EVENT DID THE LIGHT EXTINGUISH.