Narrative:

Contributing factor was the fact that as a cfii, I was flying and explaining to the student my actions, as well as communicating and scanning for traffic. My normal extensive scan of the straight in approach path was briefer than usual because of the workload, and I missed seeing the other aircraft. I suspect that as well as being on the incorrect frequency, the small transport also flew either a straight in approach or a left hand pattern, which was not the proper pattern for this particular runway. Callback conversation with reporter revealed the following: with student on first primary flight and explaining pattern. Had called unicom on published frequency, 122.7 at this airport, for information which was runway 16 which is right hand pattern and so noted in publications. Reported turn to base and due to explaining to student did not get usual long look at final. Small transport was apparently on a very long final because when he saw small transport, was already in a go around with gear coming up below the small aircraft which was at 400' AGL. Asked if small transport was on frequency several times, and when no answer went to 122.8 and found small transport there on wrong frequency. Small transport said, 'didn't you see me on left base?', and small aircraft explained pattern was right base. Small transport said not familiar with area. When asked if looked on chart or sectional, said didn't carry them, used memory. FAA investigated incident and since small transport claimed had plenty of clearance and witness on ground that small transport produced at FBO 1 mi away said no near miss FAA has closed incident. They did give small transport pilot strong admonition for not being on right frequency and not flying proper pattern.

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Original NASA ASRS Text

Title: NMAC BETWEEN GA-SMA AND CORP-SMT ON FINAL AT UNCONTROLLED ARPT.

Narrative: CONTRIBUTING FACTOR WAS THE FACT THAT AS A CFII, I WAS FLYING AND EXPLAINING TO THE STUDENT MY ACTIONS, AS WELL AS COMMUNICATING AND SCANNING FOR TFC. MY NORMAL EXTENSIVE SCAN OF THE STRAIGHT IN APCH PATH WAS BRIEFER THAN USUAL BECAUSE OF THE WORKLOAD, AND I MISSED SEEING THE OTHER ACFT. I SUSPECT THAT AS WELL AS BEING ON THE INCORRECT FREQ, THE SMT ALSO FLEW EITHER A STRAIGHT IN APCH OR A LEFT HAND PATTERN, WHICH WAS NOT THE PROPER PATTERN FOR THIS PARTICULAR RWY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: WITH STUDENT ON FIRST PRIMARY FLT AND EXPLAINING PATTERN. HAD CALLED UNICOM ON PUBLISHED FREQ, 122.7 AT THIS ARPT, FOR INFO WHICH WAS RWY 16 WHICH IS RIGHT HAND PATTERN AND SO NOTED IN PUBLICATIONS. RPTED TURN TO BASE AND DUE TO EXPLAINING TO STUDENT DID NOT GET USUAL LONG LOOK AT FINAL. SMT WAS APPARENTLY ON A VERY LONG FINAL BECAUSE WHEN HE SAW SMT, WAS ALREADY IN A GO AROUND WITH GEAR COMING UP BELOW THE SMA WHICH WAS AT 400' AGL. ASKED IF SMT WAS ON FREQ SEVERAL TIMES, AND WHEN NO ANSWER WENT TO 122.8 AND FOUND SMT THERE ON WRONG FREQ. SMT SAID, 'DIDN'T YOU SEE ME ON LEFT BASE?', AND SMA EXPLAINED PATTERN WAS RIGHT BASE. SMT SAID NOT FAMILIAR WITH AREA. WHEN ASKED IF LOOKED ON CHART OR SECTIONAL, SAID DIDN'T CARRY THEM, USED MEMORY. FAA INVESTIGATED INCIDENT AND SINCE SMT CLAIMED HAD PLENTY OF CLRNC AND WITNESS ON GND THAT SMT PRODUCED AT FBO 1 MI AWAY SAID NO NEAR MISS FAA HAS CLOSED INCIDENT. THEY DID GIVE SMT PLT STRONG ADMONITION FOR NOT BEING ON RIGHT FREQ AND NOT FLYING PROPER PATTERN.

Data retrieved from NASA's ASRS site as of August 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.