Narrative:

As I passed 1900 ft MSL, I spotted a light twin climbing in a right bank off my right wing in what appeared to be an intersecting course at the same altitude. I promptly dove in order to pass under and continued descending to pattern altitude of 1542 ft MSL (1000 ft AGL). The other act continued the right turn and departed to the ssw at approximately 2000 ft MSL. I doubt that the other pilot saw me. This would probably have been a miss even without the evasive action. There were at least 2 other airplanes in the traffic pattern for runway 35. The sun was low in the sky, creating quite a bit of glare. The light twin probably took off on runway 5, but I did not see this. I did not hear any radio call from an airplane departing runway 5. Also I had not yet made a call when the incident occurred. There was quite a bit of radio traffic from the other airplanes in the pattern and from other fields in the area which use the same frequency (122.8). I think that a major factor in this incident is the difficulty in getting out a position report on the unicom frequency when there is so much radio traffic congestion in the area.

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Original NASA ASRS Text

Title: AN ARRIVING SMA PLT RPTS AN NMAC WITH A DEPARTING SMT AT AN UNCTLED ARPT.

Narrative: AS I PASSED 1900 FT MSL, I SPOTTED A LIGHT TWIN CLBING IN A R BANK OFF MY R WING IN WHAT APPEARED TO BE AN INTERSECTING COURSE AT THE SAME ALT. I PROMPTLY DOVE IN ORDER TO PASS UNDER AND CONTINUED DSNDING TO PATTERN ALT OF 1542 FT MSL (1000 FT AGL). THE OTHER ACT CONTINUED THE R TURN AND DEPARTED TO THE SSW AT APPROX 2000 FT MSL. I DOUBT THAT THE OTHER PLT SAW ME. THIS WOULD PROBABLY HAVE BEEN A MISS EVEN WITHOUT THE EVASIVE ACTION. THERE WERE AT LEAST 2 OTHER AIRPLANES IN THE TFC PATTERN FOR RWY 35. THE SUN WAS LOW IN THE SKY, CREATING QUITE A BIT OF GLARE. THE LIGHT TWIN PROBABLY TOOK OFF ON RWY 5, BUT I DID NOT SEE THIS. I DID NOT HEAR ANY RADIO CALL FROM AN AIRPLANE DEPARTING RWY 5. ALSO I HAD NOT YET MADE A CALL WHEN THE INCIDENT OCCURRED. THERE WAS QUITE A BIT OF RADIO TFC FROM THE OTHER AIRPLANES IN THE PATTERN AND FROM OTHER FIELDS IN THE AREA WHICH USE THE SAME FREQ (122.8). I THINK THAT A MAJOR FACTOR IN THIS INCIDENT IS THE DIFFICULTY IN GETTING OUT A POS RPT ON THE UNICOM FREQ WHEN THERE IS SO MUCH RADIO TFC CONGESTION IN THE AREA.

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.