SH33 LANDS WITH GEAR UP WHEN FLT CREW FAIL TO RECOGNIZE LNDG GEAR WARNING HORN.

Narrative

AS WE BEGAN THE APCH AND WERE CLRED FOR THE VISUAL TO RWY 18 BY APCH; THE CAPT BEGAN TO REDUCE PWR. I ASKED HIM TO DEMONSTRATE A ZERO FLAP LNDG. HE STATED THAT WAS FINE AND THAT HE HAD NO PROB WITH IT. I BEGAN TO NOTICE THAT OUR AIRSPD WAS BELOW THE GEAR SPD. HE WAS TALKING TO ME WHILE I WAS LISTENING TO INSTRUCTIONS FROM MYRTLE BEACH APCH WHO WANTED ME TO SWITCH OVER TO TWR FREQ. THEN I TOLD HIM WE WERE CLRED TO LAND RWY 18. I THEN TURNED ON THE TAXI LIGHTS. A COMPANY SHORTS 330 WANTED TWR TO RELAY A MESSAGE THAT THEY LOST 10 KTS OF AIRSPD ON SHORT FINAL. I RESPONDED TO THE CTL TWR BY SAYING ROGER. I ASSUMED THE CAPT CALLED FOR THE APCH CHKLIST WHILE I WAS RESPONDING TO THE TWR. AS I LOOKED OVER; I THOUGHT I SAW WHAT APPEARED TO BE 3 DIM GREEN LIGHTS. I THINK THE SUNLIGHT MAY HAVE CAUSED THE LIGHTS TO FALSELY APPEAR ILLUMINATED FROM MY POS. THE CAPT DISTR ME WHEN HE ASKED FOR VREF SPD CONFIRMATION. I TOLD HIM THAT MY V-SPD CALLOUTS WERE WHAT WAS BEING INDICATED. THEN I CHKED THE BRAKE GAUGES FOR PRESSURE AND NO RESIDUAL AND SET THE RADAR TO STANDBY. I CONTINUED TO CONSTANTLY CALL HIS VREF SPDS. HE BROUGHT THE PROPS FULL FORWARD BECAUSE WE WERE ON SHORT FINAL. WHEN WE TOUCHED DOWN ON THE RWY I HEARD THE HORN BUT THOUGHT IT WAS THE STALL WARNING HORN. THE MAINS TOUCHED DOWN SMOOTHLY. THE HORN CONTINUED TO SOUND WHILE WAITING FOR THE NOSE GEAR TO TOUCH DOWN. I LOOKED UP TOWARDS THE STALL LIGHT ABOVE MY HEAD AND TO R AND NOTICED THAT IT WASN'T ACTIVATED. THE STALL WARNING HORN AND THE GEAR WARNING HORN HAVE THE SAME SOUND BUT THE STALL IS ACCOMPANIED WITH A STICK SHAKER. HE MAINTAINED THE RWY CTRLINE. IT FELT LIKE THE NOSEWHEEL TOUCHED DOWN THEN I HEARD A LOUD BANG AND METAL SCRAPING. MY SIDE VIEW WINDOW SHATTERED WHEN THE NOSE GEAR SETTLED ONTO THE RWY. I LOOKED AT THE GEAR LEVER AND NOTICED IT WAS IN THE DOWN POS. I TESTED THE GREEN LNDG GEAR LIGHTS AND NOTICED THAT THEY WERE NOT LIGHTING UP. THE GEAR WARNING HORN CONTINUED TO SOUND UNTIL I CANCELED IT. WE SHUT DOWN THE ENGS; CONTACTED THE TWR AND TOLD THEM WHAT HAPPENED AND THAT WE NEEDED EMER ASSISTANCE. I WAS DISTR BY CTLR'S QUERIES WHICH WERE HAPPENING WHILE BEING QUERIED BY THE CAPT ABOUT THE V-SPDS AND CALLOUTS. I DO NOT REMEMBER PUTTING THE GEAR DOWN AS THE PNF DURING THE APCH PHASE OF THE FLT. THE HYDS WERE SVCED SEVERAL TIMES FOR LOW CONTENT LAST WK. CAPT MOVED THE GEAR LEVER TO THE DOWN POS AFTER TOUCHDOWN. I DID NOT SEE HIM PHYSICALLY SELECT THAT POS BECAUSE MY ATTN WAS DIVERTED TO THE STALL WARNING INDICATOR WHICH IS POSITIONED ABOVE AND SLIGHTLY BEHIND ME. AFTER LOOKING AT THE STALL WARNING INDICATION I DIRECTED MY ATTN BACK TO THE FORWARD INST PANEL. AT THAT POINT I NOTICED THE LNDG GEAR LEVER POS; WHICH AGAIN WAS SELECTED DOWN.