Narrative:

Air carrier X established on the 31R localizer. Air carrier Y on base leg vectors. I had turned air carrier Y on the base leg to join the localizer in front of air carrier X, then realized both aircraft were at the same altitude. I issued turns to get them apart. At the time I was working both the dfw runway 31R final and both finals into dal. At dal I had to pull 1 aircraft out as the aircraft wasn't slowing quickly enough and catching the aircraft ahead. At the same time, an aircraft at dfw on a mi final could not complete his approach due to being too high. I had to pull him out, another air carrier at dal stated he wasn't going to be able to complete the approach, another aircraft being vectored to the dal final was negative transponder so I was having to update the track constantly, and then another aircraft had departed a satellite airport (rbd) and encountered IMC on a VFR flight plan. There were thunderstorms in the area with some deviations, ILS approachs at both airports, I was really busy with everything going on. I asked for help (handoff, opened another final position for dal) when the situation occurred. The final position for dal should have been open. If this had been, this would have reduced my workload greatly, the gars, pullouts may not have occurred, and the loss of separation probably never would have happened.

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Original NASA ASRS Text

Title: ACR Y HAD LTSS FROM ACR X. SYS ERROR.

Narrative: ACR X ESTABLISHED ON THE 31R LOC. ACR Y ON BASE LEG VECTORS. I HAD TURNED ACR Y ON THE BASE LEG TO JOIN THE LOC IN FRONT OF ACR X, THEN REALIZED BOTH ACFT WERE AT THE SAME ALT. I ISSUED TURNS TO GET THEM APART. AT THE TIME I WAS WORKING BOTH THE DFW RWY 31R FINAL AND BOTH FINALS INTO DAL. AT DAL I HAD TO PULL 1 ACFT OUT AS THE ACFT WASN'T SLOWING QUICKLY ENOUGH AND CATCHING THE ACFT AHEAD. AT THE SAME TIME, AN ACFT AT DFW ON A MI FINAL COULD NOT COMPLETE HIS APCH DUE TO BEING TOO HIGH. I HAD TO PULL HIM OUT, ANOTHER ACR AT DAL STATED HE WASN'T GOING TO BE ABLE TO COMPLETE THE APCH, ANOTHER ACFT BEING VECTORED TO THE DAL FINAL WAS NEGATIVE XPONDER SO I WAS HAVING TO UPDATE THE TRACK CONSTANTLY, AND THEN ANOTHER ACFT HAD DEPARTED A SATELLITE ARPT (RBD) AND ENCOUNTERED IMC ON A VFR FLT PLAN. THERE WERE TSTMS IN THE AREA WITH SOME DEVS, ILS APCHS AT BOTH ARPTS, I WAS REALLY BUSY WITH EVERYTHING GOING ON. I ASKED FOR HELP (HDOF, OPENED ANOTHER FINAL POS FOR DAL) WHEN THE SIT OCCURRED. THE FINAL POS FOR DAL SHOULD HAVE BEEN OPEN. IF THIS HAD BEEN, THIS WOULD HAVE REDUCED MY WORKLOAD GREATLY, THE GARS, PULLOUTS MAY NOT HAVE OCCURRED, AND THE LOSS OF SEPARATION PROBABLY NEVER WOULD HAVE HAPPENED.

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.