Narrative:

I was working the feeder east position. I had literally just took over the position about a minute or two ago. Before leaving the other controller had issue traffic to an A319 on a VFR that had been operating with the departure position level at 11;600 (C182). The A319 had been level at 11;000 ft on the arrival. These aircraft were separated by 500-700 ft. This aircraft was showing 11;600 ft. I made a few transmissions to other aircraft when the A319 said he was descending due to an RA with the VFR aircraft. At this time there was a departure at his 2 o'clock 2 miles level at 10;000 ft. I issued traffic and told him he was at 10;000 ft. The A319 descended to approximately 10;600 ft before returning to his altitude later. I do not know if traffic was issued to the other aircraft involved (I was only talking to the A319. The pilot reported that this was a dangerous situation and that the other aircraft should not have been allowed to be operating right over the main arrival path like that. I advised the supervisor of the pilots' comments and he said that there was nothing we could do because the C182 was outside of the class bravo. Expand the bravo 1;000 ft above the arrival routes (ie. The top would be 12;000 ft if the arrivals were at 11;000 ft.) this would give control to the FAA to approve or disapprove an operation such as this over a busy arrival route.

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Original NASA ASRS Text

Title: An A319 on the DFW BYP6 Arrival at 11;000 FT in Class B took evasive action following a TCAS RA DESCEND from a single engine aircraft at 11;500 FT outside of Class B and during the descent came with 700 FT of an another Air Carrier below him also in Class B.

Narrative: I was working the feeder east position. I had literally just took over the position about a minute or two ago. Before leaving the other controller had issue traffic to an A319 on a VFR that had been operating with the Departure position level at 11;600 (C182). The A319 had been level at 11;000 FT on the arrival. These aircraft were separated by 500-700 FT. This aircraft was showing 11;600 FT. I made a few transmissions to other aircraft when the A319 said he was descending due to an RA with the VFR aircraft. At this time there was a departure at his 2 o'clock 2 miles level at 10;000 FT. I issued traffic and told him he was at 10;000 FT. The A319 descended to approximately 10;600 FT before returning to his altitude later. I do not know if traffic was issued to the other aircraft involved (I was only talking to the A319. The pilot reported that this was a dangerous situation and that the other aircraft should not have been allowed to be operating right over the main arrival path like that. I advised the supervisor of the pilots' comments and he said that there was nothing we could do because the C182 was outside of the class bravo. Expand the Bravo 1;000 FT above the arrival routes (IE. the top would be 12;000 FT if the arrivals were at 11;000 FT.) This would give control to the FAA to approve or disapprove an operation such as this over a busy arrival route.

Data retrieved from NASA's ASRS site 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.