Narrative:

Flying an small aircraft VFR x-c en route from scottsbluff, northeast to redwood falls, mn, contacted sioux falls approach control for traffic advisories through area. Although non transponder, radar contact was established after turn for identify about 20 mn southwest of fsd. Radar service was terminated about 20 NM ene and frequency change approved. About 2 mins later, I observed an medium large transport coming right to left in a right turn. I broke right as he passed in front and slightly below me. He appeared to turn back left after passing. I feel I would have been able to be more alert to situation by staying on approach control frequency if radar contact could have been maintained for a longer time. I had not been advised of the medium large transport and do not know if he had been advised of my presence.

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Original NASA ASRS Text

Title: POTENTIAL CONFLICT BETWEEN DESCENDING ACR-MLG AND GA-SMA.

Narrative: FLYING AN SMA VFR X-C ENRTE FROM SCOTTSBLUFF, NE TO REDWOOD FALLS, MN, CONTACTED SIOUX FALLS APCH CTL FOR TFC ADVISORIES THROUGH AREA. ALTHOUGH NON TRANSPONDER, RADAR CONTACT WAS ESTABLISHED AFTER TURN FOR IDENT ABOUT 20 MN SW OF FSD. RADAR SVC WAS TERMINATED ABOUT 20 NM ENE AND FREQ CHANGE APPROVED. ABOUT 2 MINS LATER, I OBSERVED AN MLG COMING RIGHT TO LEFT IN A RIGHT TURN. I BROKE RIGHT AS HE PASSED IN FRONT AND SLIGHTLY BELOW ME. HE APPEARED TO TURN BACK LEFT AFTER PASSING. I FEEL I WOULD HAVE BEEN ABLE TO BE MORE ALERT TO SITUATION BY STAYING ON APCH CTL FREQ IF RADAR CONTACT COULD HAVE BEEN MAINTAINED FOR A LONGER TIME. I HAD NOT BEEN ADVISED OF THE MLG AND DO NOT KNOW IF HE HAD BEEN ADVISED OF MY PRESENCE.

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.