Narrative:

I was on an IFR flight to I77 (blue ash airport). The WX dictated an approach. Cvg approach cleared me for the VOR 24 approach and cleared me to contact unicom, which I switched to, and proceeded on the approach as well as calling unicom for advisory and telling them I was on the VOR 24 approach. I never received a reply. I proceeded on the approach and again tried to get a reply from unicom with no reply. I broke out underneath the overcast and started looking for the airport. After I spotted the airport, I decided to make a circling approach and switched back to approach frequency and advised him of my intentions and also cancelled my IFR. Approach acknowledged and I concentrated on circling and getting on the ground. Upon parking, some irate person said I was very lucky to be there because I just about collided with a traffic helicopter. I must add, while circling, I did not see any movement on the ground or in the air. I did broadcast my intentions and that I was on the IFR approach on the unicom frequency. I will next time wait until I'm on the ground to cancel the IFR and will make a double effort to continue on unicom frequency.

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Original NASA ASRS Text

Title: AN SMT HAD AN NMAC WITH A TFC WATCH HELI WHILE CIRCLING TO LAND AFTER AN INST APCH.

Narrative: I WAS ON AN IFR FLT TO I77 (BLUE ASH ARPT). THE WX DICTATED AN APCH. CVG APCH CLRED ME FOR THE VOR 24 APCH AND CLRED ME TO CONTACT UNICOM, WHICH I SWITCHED TO, AND PROCEEDED ON THE APCH AS WELL AS CALLING UNICOM FOR ADVISORY AND TELLING THEM I WAS ON THE VOR 24 APCH. I NEVER RECEIVED A REPLY. I PROCEEDED ON THE APCH AND AGAIN TRIED TO GET A REPLY FROM UNICOM WITH NO REPLY. I BROKE OUT UNDERNEATH THE OVCST AND STARTED LOOKING FOR THE ARPT. AFTER I SPOTTED THE ARPT, I DECIDED TO MAKE A CIRCLING APCH AND SWITCHED BACK TO APCH FREQ AND ADVISED HIM OF MY INTENTIONS AND ALSO CANCELLED MY IFR. APCH ACKNOWLEDGED AND I CONCENTRATED ON CIRCLING AND GETTING ON THE GND. UPON PARKING, SOME IRATE PERSON SAID I WAS VERY LUCKY TO BE THERE BECAUSE I JUST ABOUT COLLIDED WITH A TFC HELI. I MUST ADD, WHILE CIRCLING, I DID NOT SEE ANY MOVEMENT ON THE GND OR IN THE AIR. I DID BROADCAST MY INTENTIONS AND THAT I WAS ON THE IFR APCH ON THE UNICOM FREQ. I WILL NEXT TIME WAIT UNTIL I'M ON THE GND TO CANCEL THE IFR AND WILL MAKE A DOUBLE EFFORT TO CONTINUE ON UNICOM FREQ.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.