BE99 PLT LANDS GEAR UP.

Narrative

I WAS LNDG AT THE ZZZ ARPT ON RWY 36 AFTER TAKING A LOAD OF 12 SKYDIVERS TO 13500 FT MSL. I WAS OPERATING A BEECH B99. I WAS WAITING FOR THE ACFT TO TOUCH DOWN AND WAS IN THE FLAIR WHEN THE AIRPLANE STRUCK THE RWY. IT WAS AT THAT TIME I REALIZED THAT I DID NOT HAVE THE LNDG GEAR DOWN. AS I WAS ENTERING THE TFC PATTERN I WATCHED A JUMPER LAND OFF THE ARPT. ENSURING THE JUMPER'S SAFETY IS ONE OF MY TOP PRIORITIES AS A JUMP PLT. ON THE DAY IN QUESTION; I FLEW A NORMAL TFC PATTERN; TURNING DOWNWIND AT 1500 FT AGL. I BEGAN TO GO THROUGH MY FLOW PATTERN CHKLIST; BUT CONTINUED TO WATCH THE JUMPER (AND THE OTHER SKYDIVERS WHO WERE LNDG NEAR THE RWY) TO MAKE SURE THEY WERE SAFE WHILE I PERFORMED MY FINAL CHKLIST. FATIGUE MAY HAVE PLAYED A ROLE IN THE INCIDENT. I HAD ONLY SLEPT FOR 3 HRS THE MORNING OF THE INCIDENT AND I HAD WORKED ALL NIGHT DOING FLT STANDBY DUTY. HOWEVER; I DIDN'T MENTION IN THE STATEMENT THAT I HAD SLEPT APPROX 4 HRS THE PRIOR EVENING. I ARRIVED AT THE ARPT MID MORNING ON THE DAY OF THE INCIDENT.