ATX HELI PLT MISTAKENLY CROSSED OVER ARPT AT THE WRONG POINT IN TRANSIT TO ANOTHER HELIPORT.

Narrative

I DEPARTED THE HELIPAD IN DURHAM; NC; NC92 TO FLY TO A FOOTBALL STADIUM IN RALEIGH; NC; WHICH WAS ON THE OTHER SIDE OF RDU ARPT. AFTER TKOF I HEADED S CLBING TO 1500 FT MSL AND CONTACTED RDU APCH CTL ON 125.3. THE INSTRUCTED SQUAWK XXXX AND CONTACT APCH CTL ON 132.35. I CALLED ON THIS FREQ AND AGAIN WAS TOLD TO SQUAWK XXXX. I CHKED THE TRANSPONDER AND IT WAS SET TO XXXX. AT 5 NM NW OF RDU I ASKED APCH CTL IF I WAS RADAR CONTACT. THEY REPLIED SQUAWK XXXX. I SAID I WAS AND WHAT WERE THEY RECEIVING. THEY SAID THEY WERE RECEIVING XXXY. I RECYCLED THE LAST DIGIT AND THEY GAVE ME RADAR CONTACT FLY HDG 100 DEG AND CROSS THE DEP END OF RWY 23R. AT THIS POINT I THOUGHT AND PERCEIVED I HEARD 'TURN TO 100 DEG AND CROSS THE DEP END OF RWY 23R.' I TURNED TO 100 DEG AND WHEN I REACHED THE DEP END OF RWY 23R I TURNED TO CROSS. AS I CROSSED THE CTRLINE I SAW AN ACR WDB ACFT LEAVE THE RWY MAKING A CLBING R TURN TO PASS BEHIND ME. I WAS EXPECTING TO CROSS BTWN DEPS AS I HAD DONE ON PREVIOUS XINGS ON THE DEP END OF THE ARPT. I THEN REALIZED I WAS XING AT THE WRONG END OF THE ARPT AND SHOULD HAVE CROSSED AT THE APCH END. AT THIS POINT APCH CALLED AND SAID THAT HE HAD NEEDED ME OVER THE APCH END OF RWY 23 AND CONTACT APCH ON 125.3. I CONTACTED THEM AND CONTINUED TO LAND AT THE STADIUM. I BELIEVE BECAUSE I HAD BEEN EXPECTING TO CROSS SW OF THE ARPT BELOW DEPARTING TFC WHEN I RECEIVED THE CLRNC. I WAS STILL THINKING SW SIDE (DEP END) I HEARD WHAT I WAS THINKING AND EXPECTING; DEP END; I BELIEVED THIS WAS CAUSED IN PART BY THE DISTR OF THE TRANSPONDER PROBLEM AND THE RAPID PACE OF RADIO TFC ON APCH CTL. I THINK IT WOULD HAVE HELPED IF DUE TO LOW ALT 1500 FT XING TO HAVE BEEN SWITCHED TO TWR FREQ FROM APCH CTL UNTIL OVER THE ARPT. I ALSO BELIEVED I ALLOWED MYSELF TO BE DISTR BY OTHER EVENTS LEADING TO THE WRONG INTERRUPTION OF THE CLRNC.