Narrative:

I was giving instrument instruction to an ATP candidate in an small aircraft. We were on the ILS approach to runway 5 edf when the final controller called traffic at 6 O'clock 1 mi converging. I looked behind us and called no contact. The controller called traffic less then 1 mi 6 O'clock still converging. At this point I took control of the plane and turned right off the final approach course. We returned to merrill field for landing. The frequency of the final controller was 134.9. My student called for edf after landing and was told that the plane behind us was an FAA light transport doing flight checks on the ILS system. He was not in radio contact with the edf controller.

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Original NASA ASRS Text

Title: SMA ON ILS APCH TAKES EVASIVE ACTION TO AVOID LTT APCHING FROM 6 O'CLOCK POSITION ON ILS ALSO.

Narrative: I WAS GIVING INSTRUMENT INSTRUCTION TO AN ATP CANDIDATE IN AN SMA. WE WERE ON THE ILS APCH TO RWY 5 EDF WHEN THE FINAL CTLR CALLED TFC AT 6 O'CLOCK 1 MI CONVERGING. I LOOKED BEHIND US AND CALLED NO CONTACT. THE CTLR CALLED TFC LESS THEN 1 MI 6 O'CLOCK STILL CONVERGING. AT THIS POINT I TOOK CTL OF THE PLANE AND TURNED R OFF THE FINAL APCH COURSE. WE RETURNED TO MERRILL FIELD FOR LNDG. THE FREQ OF THE FINAL CTLR WAS 134.9. MY STUDENT CALLED FOR EDF AFTER LNDG AND WAS TOLD THAT THE PLANE BEHIND US WAS AN FAA LTT DOING FLT CHKS ON THE ILS SYS. HE WAS NOT IN RADIO CONTACT WITH THE EDF CTLR.

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.