VFR traffic conflict caused TCASII RA.

Attributes
ACN	318241
Time
Date	199510
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : buj airport : dfw
State Reference	TX
Altitude	msl bound lower : 9700 msl bound upper : 10600
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	318241
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	318240
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 300 vertical : 200
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On dfw approach frequency on a 260 degree heading, 5 mi south of buj, with a descent clearance to 9000 ft, a TCASII RA occurred at approximately 10000 ft MSL. Our aircraft descended to approximately 9700 ft and passed within 200 ft vertical and very close laterally to a light aircraft. TCASII escape was initiated at 9900-10000 ft with a command of 2000 FPM climb. ATC was advised of escape maneuver, and we were informed that the RA traffic was VFR at 9500 ft. My estimate is that we would have passed through his altitude within a few hundred ft or less from his aircraft. TCASII RA was satisfied at approximately 10600 ft and the arrival was resumed.

Original NASA ASRS Text

Title: VFR TFC CONFLICT CAUSED TCASII RA.

Narrative: ON DFW APCH FREQ ON A 260 DEG HDG, 5 MI S OF BUJ, WITH A DSCNT CLRNC TO 9000 FT, A TCASII RA OCCURRED AT APPROX 10000 FT MSL. OUR ACFT DSNDED TO APPROX 9700 FT AND PASSED WITHIN 200 FT VERT AND VERY CLOSE LATERALLY TO A LIGHT ACFT. TCASII ESCAPE WAS INITIATED AT 9900-10000 FT WITH A COMMAND OF 2000 FPM CLB. ATC WAS ADVISED OF ESCAPE MANEUVER, AND WE WERE INFORMED THAT THE RA TFC WAS VFR AT 9500 FT. MY ESTIMATE IS THAT WE WOULD HAVE PASSED THROUGH HIS ALT WITHIN A FEW HUNDRED FT OR LESS FROM HIS ACFT. TCASII RA WAS SATISFIED AT APPROX 10600 FT AND THE ARR WAS RESUMED.

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.