Narrative:

While doing touch-and-goes in my small aircraft a, I was midway downwind for runway 5 at pattern altitude when an aircraft came directly toward me at the same altitude doing a right upwind for runway 23. The unknown aircraft did a diving turn to the left and passed under and away from me to my right -- distance was approximately 100 ft. I noted the last 2 numbers and the type as small aircraft B. After landing and taxiing off the runway 5, this unknown aircraft landed behind me and I was able to note the full tall number. After tying down my aircraft I went into FBO office at north central and related the incident to personnel. An acquaintance in the office asked if I got the tail number? Replying XXXY, he said 'oh, that's other FBO's plane!' 'mr. X seated over there has been talking to that plane all along on portable communication radio.' the intentions were unknown from this aircraft -- at the time of entry into the upwind landing for runway 23. The aircraft did not seem to be on north central unicom.

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Original NASA ASRS Text

Title: SMA ON DOWNWIND AT UNCTLED FIELD HAS NMAC WITH SMA DOWNWIND OPPOSITE DIRECTION.

Narrative: WHILE DOING TOUCH-AND-GOES IN MY SMA A, I WAS MIDWAY DOWNWIND FOR RWY 5 AT PATTERN ALT WHEN AN ACFT CAME DIRECTLY TOWARD ME AT THE SAME ALT DOING A R UPWIND FOR RWY 23. THE UNKNOWN ACFT DID A DIVING TURN TO THE L AND PASSED UNDER AND AWAY FROM ME TO MY R -- DISTANCE WAS APPROX 100 FT. I NOTED THE LAST 2 NUMBERS AND THE TYPE AS SMA B. AFTER LNDG AND TAXIING OFF THE RWY 5, THIS UNKNOWN ACFT LANDED BEHIND ME AND I WAS ABLE TO NOTE THE FULL TALL NUMBER. AFTER TYING DOWN MY ACFT I WENT INTO FBO OFFICE AT N CENTRAL AND RELATED THE INCIDENT TO PERSONNEL. AN ACQUAINTANCE IN THE OFFICE ASKED IF I GOT THE TAIL NUMBER? REPLYING XXXY, HE SAID 'OH, THAT'S OTHER FBO'S PLANE!' 'MR. X SEATED OVER THERE HAS BEEN TALKING TO THAT PLANE ALL ALONG ON PORTABLE COM RADIO.' THE INTENTIONS WERE UNKNOWN FROM THIS ACFT -- AT THE TIME OF ENTRY INTO THE UPWIND LNDG FOR RWY 23. THE ACFT DID NOT SEEM TO BE ON N CENTRAL UNICOM.

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.