BE58 PLT RETRACTED THE LNDG GEAR ON THE ROLLOUT AT TYS.

Narrative

THIS INCIDENT TOOK PLACE WITH A BARON 58. I HAD APCHED THE ARPT IN A L BASE FOR THE RWY. I TURNED INBOUND FOR A 2 MI FINAL; AT WHICH TIME THE ACFT WAS IN FULL LNDG CONFIGN (FULL FLAPS; LNDG GEAR DOWN WITH GREEN LIGHT INDICATED; AND AIRSPD AROUND 110-120 KTS). DUE TO LCL NOTAMS AT THE ARPT; I LANDED LONG TO MAKE THE FIRST AVAILABLE TXWY TO MY RAMP. AS I TOUCHED DOWN AND STARTED TO ROLLOUT FROM THE LNDG (GOING BTWN 60-80 KTS OR SO); I WAS GOING TO RETRACT THE FLAPS AND PERFORM A SHORT-FIELD LNDG TO MAKE THE A7 TXWY; AND INSTEAD I HAD REACHED AND RETRACTED THE GEAR SWITCH. AT THAT POINT; I STARTED TO SEE THE NOSE DROP PAST THE NORMAL HORIZON THAT I WAS USED TO SEEING WHEN ON THE GND. I IMMEDIATELY PUT THE GEAR SWITCH BACK IN THE 'GEAR DOWN' POS WHILE MAINTAINING BACK PRESSURE ON THE YOKE (RIDING ON THE MAIN GEAR ONLY) AND KEEPING THE NOSE OFF THE GND. AT THAT POINT; I SAW A GREEN INDICATOR LIGHT 'ON' AND ASSUMED THAT MY NOSE GEAR HAD RETURNED INTO THE EXTENDED POS; RELEASED THE BACK PRESSURE THAT WAS APPLIED AND CAME DOWN THIS TIME ON THE NOSE GEAR. I WAS THEN ABLE TO TURN OFF AT A7 TXWY AND MAKE MY WAY TO THE RAMP. AFTER SHUTDOWN; I DID A POSTFLT INSPECTION; ONLY TO FIND THAT ALL THE BLADE TIPS (6) WERE BENT INTO A 'U' SHAPE AND THAT THERE WERE NO SIGNS OF DAMAGE TO THE FUSELAGE; ANTENNAS; OR ANY VISIBLE PART OF THE ACFT. FINALLY; I CONTACTED DISPATCH AND RPTED THE INCIDENT. AS FAR AS HEARING ANY LOUD OR UNUSUAL NOISES AT THE TIME; I CAN HONESTLY SAY I DID NOT RECALL HEARING ANYTHING. ALSO; NO FOD OR OBJECTS DO I RECALL ON THE RWY; TXWYS; OR RAMP AREA.