MD80 crew is pulled out for another vector when they receive a TCASII alert on final at 3000 ft.

Attributes
ACN	582492
Time
Date	200305
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl single value : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon tower : iah.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 36l other
Flight Phase	descent : approach landing : go around
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d10.tracon
Make Model Name	Commercial Fixed Wing
Flight Phase	descent : approach descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	582492
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : overshoot conflict : airborne critical non adherence : clearance non adherence : required legal separation other spatial deviation
Independent Detector	atc equipment other atc equipment : radar/mode c aircraft equipment : tcas other controllera other flight crewa other flight crewb other other : 3
Resolutory Action	controller : issued new clearance
Miss Distance	horizontal : 12000 vertical : 400
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

Dfw, ILS runway 36L. On localizer at 3000 ft ILS runway 36L. TCASII RA monitor vertical speed, ATC broke us off approach to left. In IMC other aircraft was less than 2 mi to west approximately 400 ft below us. We were vectored back around for approach.

Original NASA ASRS Text

Title: MD80 CREW IS PULLED OUT FOR ANOTHER VECTOR WHEN THEY RECEIVE A TCASII ALERT ON FINAL AT 3000 FT.

Narrative: DFW, ILS RWY 36L. ON LOC AT 3000 FT ILS RWY 36L. TCASII RA MONITOR VERT SPD, ATC BROKE US OFF APCH TO L. IN IMC OTHER ACFT WAS LESS THAN 2 MI TO W APPROX 400 FT BELOW US. WE WERE VECTORED BACK AROUND FOR APCH.

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.