CORP ACFT FAILS TO COM WITH TWR ON APCH. HELI ON RWY; CORP ACFT EXECUTES GAR.

Narrative

I WAS FLYING R SEAT ON A DEAD HEAD LEG ALLOWING MY FO TO GET SOME L SEAT TIME. NEW ORLEANS APCH HANDED US OFF TO HOUMA TWR. AS IT WAS THE FIRST TIME THAT MY FO HAD EVER FLOWN THE PLANE; I WAS CAREFULLY MONITORING HIS ACTIONS AND THE ACFT SYS. I REALLY THOUGHT; AND STILL THINK; THAT TWR CLRED US TO LAND BEHIND A LTT. I SAW THE LTT LAND AS WE TURNED IN ON A 3 MI L BASE. ON A 1 MI FINAL; I SAW SOMETHING ON THE RWY AND QUERIED THE TWR AS TO WHAT IT WAS. THE TWR IMMEDIATELY CONTACTED THE HELI TAXIING DOWN THE RWY. THIS WAS THE FIRST COM THAT I HEARD BTWN TWR AND THIS HELI. WHAT PUZZLES ME IS THAT THE TWR ASKED THE HELI HIS INTENTIONS AND INFORMED HIM THAT THERE WAS A PLANE ON SHORT FINAL WHO HE WAS NOT TALKING TO. I INITIATED A GAR JUST AS THE TWR ASKED US TO GAR. WE WERE CLRED FOR A L PATTERN AND THAT WAS FOLLOWED BY AN UNEVENTFUL LNDG. UNFORTUNATELY; OUR COMPANY EMPLOYEES WERE WAITING FOR US; WHICH PRECLUDED MY TALKING TO THE CTLR. IT IS POSSIBLE THAT I MISSED A RADIO CALL WHILE I WAS WATCHING THE FO PREPARE TO LAND; THEREFORE; IN THE FUTURE; I WILL BE AWARE OF DIVIDING MY ATTN BETTER. ONE LAST FACT IS I REMEMBER THE HELI RPTING THAT HE HAD JUST HAD A BIRD STRIKE BUT NEEDED NO ASSISTANCE. I DON'T KNOW WHERE THE HELI CAME FROM - WHETHER HE WAS LNDG OR TAKING OFF; BUT THE COM I HEARD BTWN THE HELI AND THE TWR WAS THE FIRST TIME I HEARD HIM ON THE RADIO.