Narrative:

At 10 NM from the airport, I contacted unicom, and was told the active runway was 35. I was entering from the east, so I announced entering right downwind for 36 at a 45 degree. I listened as a helicopter turned right base to final, and landed. Because the helicopter was on the threshold, I extended my downwind approximately 1 mi, and proceeded to descend. I announced while turning right base, and was told by another aircraft that traffic was l-hand and I was to 'go around.' I lifted my wing to clear before starting my climb out, when I saw another high wing on final, approximately 150 ft to my left and 50 ft above. This aircraft had not called his position, except to scream at me over the radio. After I began evasives. I believe that this situation could have been avoided if the other aircraft would have not only announced his intentions and position but also using sound judgement in allowing space between us. I also feel that, if unicom gives active runway information, they should state whether right or l-hand traffic is being used, or if there is a preference. I also believe that this could have been avoided by more accurate scanning methods on my part.

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Original NASA ASRS Text

Title: SMA IN UNCTLED ARPT TFC PATTERN HAS NMAC WITH SECOND ACFT.

Narrative: AT 10 NM FROM THE ARPT, I CONTACTED UNICOM, AND WAS TOLD THE ACTIVE RWY WAS 35. I WAS ENTERING FROM THE E, SO I ANNOUNCED ENTERING R DOWNWIND FOR 36 AT A 45 DEG. I LISTENED AS A HELI TURNED R BASE TO FINAL, AND LANDED. BECAUSE THE HELI WAS ON THE THRESHOLD, I EXTENDED MY DOWNWIND APPROX 1 MI, AND PROCEEDED TO DSND. I ANNOUNCED WHILE TURNING R BASE, AND WAS TOLD BY ANOTHER ACFT THAT TFC WAS L-HAND AND I WAS TO 'GAR.' I LIFTED MY WING TO CLR BEFORE STARTING MY CLBOUT, WHEN I SAW ANOTHER HIGH WING ON FINAL, APPROX 150 FT TO MY L AND 50 FT ABOVE. THIS ACFT HAD NOT CALLED HIS POS, EXCEPT TO SCREAM AT ME OVER THE RADIO. AFTER I BEGAN EVASIVES. I BELIEVE THAT THIS SITUATION COULD HAVE BEEN AVOIDED IF THE OTHER ACFT WOULD HAVE NOT ONLY ANNOUNCED HIS INTENTIONS AND POS BUT ALSO USING SOUND JUDGEMENT IN ALLOWING SPACE BTWN US. I ALSO FEEL THAT, IF UNICOM GIVES ACTIVE RWY INFO, THEY SHOULD STATE WHETHER R OR L-HAND TFC IS BEING USED, OR IF THERE IS A PREFERENCE. I ALSO BELIEVE THAT THIS COULD HAVE BEEN AVOIDED BY MORE ACCURATE SCANNING METHODS ON MY PART.

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.