D10 controller described a loss of separation event when the facility 'pre-arranged' coordination pr...

Attributes
ACN	883277
Time
Date	201004
Local Time Of Day	1201-1800
Place
Locale Reference	DFW.Airport
State Reference	TX
Aircraft 1
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Aircraft 2
Make Model Name	Eclipse 500
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Approach
Events
Anomaly	ATC Issue All Types Airspace Violation All Types Deviation - Procedural Published Material / Policy

Narrative:

Air carrier X was on downwind to runway 17C at dfw. Aircraft Y was being worked by dallas north. I 'quick looked' dallas north sector to scan for traffic. I descended air carrier X from 6000 to 4000 in prearranged coordination airspace. About a minute later I observed aircraft Y over ads airport at 4000 on a converging course when the aircraft were approximately 4 miles apart. I immediately turned air carrier X to a heading of 260 and advised air carrier X about aircraft Y. Conflict alert activated. Air carrier X didn't see aircraft Y. Separation was lost for about 10 seconds and then reestablished on diverging courses. Recommendation; I recommend making point outs instead of using prearranged coordination airspace.

Original NASA ASRS Text

Title: D10 Controller described a loss of separation event when the facility 'pre-arranged' coordination procedure failed and a conflict developed between two DFW arrivals; the reporter suggests point outs should be used in lieu of the existing procedure.

Narrative: Air Carrier X was on downwind to Runway 17C at DFW. Aircraft Y was being worked by Dallas North. I 'quick looked' Dallas North sector to scan for traffic. I descended Air Carrier X from 6000 to 4000 in prearranged coordination airspace. About a minute later I observed Aircraft Y over ADS airport at 4000 on a converging course when the aircraft were approximately 4 miles apart. I immediately turned Air Carrier X to a heading of 260 and advised Air Carrier X about Aircraft Y. Conflict Alert activated. Air Carrier X didn't see Aircraft Y. Separation was lost for about 10 seconds and then reestablished on diverging courses. Recommendation; I recommend making point outs instead of using prearranged coordination airspace.

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.

D10 controller described a loss of separation event when the facility 'pre-arranged' coordination procedure failed and a conflict developed between two dfw arrivals; the reporter suggests point outs should be used in lieu of the existing procedure.