Narrative:

We were on a flight from xna to dfw. ZFW gave us a clearance to cross 30 mi north of byp at 11000 ft. After we descended through 12000 ft, center gave us another clearance to 10000 ft and then cross karla intersection at 8000 ft. As we neared 10000 ft, we got a traffic warning from the TCASII. TCASII showed traffic at our 12 O'clock position and 1 mi, 300 ft below us. We got the aircraft (a single engine cessna) in sight and stopped our descent. We passed 200 ft above and about 100 ft to the west of the cessna. We asked center about the traffic and he said he did not see him on his radar. This near midair collision could have been prevented if ATC had not required us to be at that low altitude 70 mi from dfw. It is standard procedure for ATC to have high performance turboprop aircraft at low altitudes mixing with light single engine aircraft. This is caused by dfw TRACON -- they require all propeller driven aircraft to be at low altitudes. If this procedure is not changed soon, there is going to be a midair that kills people.

Google
 

Original NASA ASRS Text

Title: NMAC BTWN AN EMBRAER 120 DSNDING ON A STAR ARR TO DFW AT 10000 FT, 80 MI NE, AND AN SEL CESSNA. ARTCC RADAR CTLR DID NOT HAVE THE CESSNA ON RADAR.

Narrative: WE WERE ON A FLT FROM XNA TO DFW. ZFW GAVE US A CLRNC TO CROSS 30 MI N OF BYP AT 11000 FT. AFTER WE DSNDED THROUGH 12000 FT, CTR GAVE US ANOTHER CLRNC TO 10000 FT AND THEN CROSS KARLA INTXN AT 8000 FT. AS WE NEARED 10000 FT, WE GOT A TFC WARNING FROM THE TCASII. TCASII SHOWED TFC AT OUR 12 O'CLOCK POS AND 1 MI, 300 FT BELOW US. WE GOT THE ACFT (A SINGLE ENG CESSNA) IN SIGHT AND STOPPED OUR DSCNT. WE PASSED 200 FT ABOVE AND ABOUT 100 FT TO THE W OF THE CESSNA. WE ASKED CTR ABOUT THE TFC AND HE SAID HE DID NOT SEE HIM ON HIS RADAR. THIS NMAC COULD HAVE BEEN PREVENTED IF ATC HAD NOT REQUIRED US TO BE AT THAT LOW ALT 70 MI FROM DFW. IT IS STANDARD PROC FOR ATC TO HAVE HIGH PERFORMANCE TURBOPROP ACFT AT LOW ALTS MIXING WITH LIGHT SINGLE ENG ACFT. THIS IS CAUSED BY DFW TRACON -- THEY REQUIRE ALL PROP DRIVEN ACFT TO BE AT LOW ALTS. IF THIS PROC IS NOT CHANGED SOON, THERE IS GOING TO BE A MIDAIR THAT KILLS PEOPLE.

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.