F100 landing dfw experienced near midair collision with VFR traffic.

Attributes
ACN	580021
Time
Date	200304
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl single value : 4000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 31r other
Flight Phase	descent : approach
Route In Use	approach : instrument non precision approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d10.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	580021
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : nmac
Independent Detector	aircraft equipment : tcas other controllera other flight crewa
Resolutory Action	controller : issued advisory
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 400
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance

Narrative:

We were about 20 mi from runway 31R at dfw at 4000 ft. We were cleared to intercept the runway 31R localizer and to expect the stadium visual approach. The autoplt was on. The first officer was the PF. All our exterior lights were on. The WX was clear with 50+ mi visibility. We were talking to ft worth approach control. The controller started telling us about some VFR traffic below us and that when I saw the traffic appear on our TCASII 400 ft below and right in front of us. The traffic continued to climb to our altitude. The TCASII commanded an RA for us to climb. We never saw the other airplane visually, but we were told the other airplane saw us and he was told to stay separated. First of all I think it was extremely poor technique for approach control to put that VFR traffic right under our nose. Second, why was that aircraft at 3500 ft since it left the mckinny airport and then suddenly climb up to our altitude as soon as we were in front of and over it.

Original NASA ASRS Text

Title: F100 LNDG DFW EXPERIENCED NMAC WITH VFR TFC.

Narrative: WE WERE ABOUT 20 MI FROM RWY 31R AT DFW AT 4000 FT. WE WERE CLRED TO INTERCEPT THE RWY 31R LOC AND TO EXPECT THE STADIUM VISUAL APCH. THE AUTOPLT WAS ON. THE FO WAS THE PF. ALL OUR EXTERIOR LIGHTS WERE ON. THE WX WAS CLR WITH 50+ MI VISIBILITY. WE WERE TALKING TO FT WORTH APCH CTL. THE CTLR STARTED TELLING US ABOUT SOME VFR TFC BELOW US AND THAT WHEN I SAW THE TFC APPEAR ON OUR TCASII 400 FT BELOW AND RIGHT IN FRONT OF US. THE TFC CONTINUED TO CLB TO OUR ALT. THE TCASII COMMANDED AN RA FOR US TO CLB. WE NEVER SAW THE OTHER AIRPLANE VISUALLY, BUT WE WERE TOLD THE OTHER AIRPLANE SAW US AND HE WAS TOLD TO STAY SEPARATED. FIRST OF ALL I THINK IT WAS EXTREMELY POOR TECHNIQUE FOR APCH CTL TO PUT THAT VFR TFC RIGHT UNDER OUR NOSE. SECOND, WHY WAS THAT ACFT AT 3500 FT SINCE IT LEFT THE MCKINNY ARPT AND THEN SUDDENLY CLB UP TO OUR ALT AS SOON AS WE WERE IN FRONT OF AND OVER IT.

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.