ZFW controller described a near loss of separation event when failing to note a developing conflict ...

Attributes
ACN	869067
Time
Date	201001
Local Time Of Day	1201-1800
Place
Locale Reference	ZFW.ARTCC
State Reference	TX
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	None
Flight Plan	IFR
Aircraft 2
Make Model Name	Global Express (BD700)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Person 1
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict
Miss Distance	Horizontal 32160 Vertical 300

Narrative:

Air carrier X said he received a TCAS alert and asked for traffic. At that point I saw aircraft Y approaching air carrier X at FL372 and about 5 miles. I immediately turned aircraft Y to the right. Air carrier X did not respond to any TCAS RA's. The closest the 2 airplanes got was 5.36 miles and 300 ft. Workload was complex; we had a trl lander cutting through all the departures. Conflict alert did not go off on the scope. Uret (user request evaluation tool) was not showing conflict. Recommendation; reset parameters of conflict alert. Uret tends to not show conflicts when you only have the hand off on one of the two airplanes.

Original NASA ASRS Text

Title: ZFW Controller described a near loss of separation event when failing to note a developing conflict reported by one of the aircraft involved; reporter alleged URET did not indicate conflict.

Narrative: Air Carrier X said he received a TCAS Alert and asked for traffic. At that point I saw Aircraft Y approaching Air Carrier X at FL372 and about 5 miles. I immediately turned Aircraft Y to the right. Air Carrier X did not respond to any TCAS RA's. The closest the 2 airplanes got was 5.36 miles and 300 FT. Workload was complex; we had a TRL lander cutting through all the departures. Conflict Alert did not go off on the scope. URET (User Request Evaluation Tool) was not showing conflict. Recommendation; reset parameters of conflict alert. URET tends to not show conflicts when you only have the hand off on one of the two airplanes.

Data retrieved from NASA's ASRS site as of April 2012 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.

ZFW controller described a near loss of separation event when failing to note a developing conflict reported by one of the aircraft involved; reporter alleged uret did not indicate conflict.