Narrative:

I was working the mem hi sector, trainers, when I asked to hold mem inbnds. I had about 4 in holding and I had an aircraft landing nashville that I needed to des. I vectored an arrival (air carrier X) to mem (that was not yet holding) behind the nashville inbound, and descended the nashville inbound. I received word that the arrs to mem could be accepted by low altitude sector. I gave all my attention to the inbnds to mem (holding) and forgot to turn back air carrier X, the mem inbound, on the vector behind the nashville arrival. I then was told by my trainer to do something with my mem arrival (X) on a vector, who was now headed toward air carrier Y, an overflt down J29. I turned both aircraft and descended air carrier X. Callback conversation with reporter revealed the following: reporter gave yrs in ATC. Described the aircraft involved in less than standard separation. She told me the location of conflict. Facility did review as operational error and called it a 'minor/minor' with 4.8 latitude and 200' vertical sep. Flight crews did not report seeing other aircraft. After conflict alert activated, reporter turned both aircraft and gave air carrier X des. Had to call aircraft about 3 times before air carrier X received avoidance instructions. Thinks flight conditions were VMC at FL310.

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Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN 2 ACR. OPERATIONAL ERROR.

Narrative: I WAS WORKING THE MEM HI SECTOR, TRAINERS, WHEN I ASKED TO HOLD MEM INBNDS. I HAD ABOUT 4 IN HOLDING AND I HAD AN ACFT LNDG NASHVILLE THAT I NEEDED TO DES. I VECTORED AN ARR (ACR X) TO MEM (THAT WAS NOT YET HOLDING) BEHIND THE NASHVILLE INBND, AND DESCENDED THE NASHVILLE INBND. I RECEIVED WORD THAT THE ARRS TO MEM COULD BE ACCEPTED BY LOW ALT SECTOR. I GAVE ALL MY ATTN TO THE INBNDS TO MEM (HOLDING) AND FORGOT TO TURN BACK ACR X, THE MEM INBND, ON THE VECTOR BEHIND THE NASHVILLE ARR. I THEN WAS TOLD BY MY TRAINER TO DO SOMETHING WITH MY MEM ARR (X) ON A VECTOR, WHO WAS NOW HEADED TOWARD ACR Y, AN OVERFLT DOWN J29. I TURNED BOTH ACFT AND DESCENDED ACR X. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: REPORTER GAVE YRS IN ATC. DESCRIBED THE ACFT INVOLVED IN LTSS. SHE TOLD ME THE LOCATION OF CONFLICT. FAC DID REVIEW AS OPERROR AND CALLED IT A 'MINOR/MINOR' WITH 4.8 LAT AND 200' VERT SEP. FLT CREWS DID NOT RPT SEEING OTHER ACFT. AFTER CONFLICT ALERT ACTIVATED, RPTR TURNED BOTH ACFT AND GAVE ACR X DES. HAD TO CALL ACFT ABOUT 3 TIMES BEFORE ACR X RECEIVED AVOIDANCE INSTRUCTIONS. THINKS FLT CONDITIONS WERE VMC AT FL310.

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.