B777 captain experienced TCASII RA on final at dfw with aircraft on parallel runway.

Attributes
ACN	615344
Time
Date	200404
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl bound lower : 4600 msl bound upper : 5000
Environment
Flight Conditions	IMC
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 35c other other
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	615344
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Aircraft FAA Flight Crew Human Performance Navigational Facility ATC Human Performance
Primary Problem	Ambiguous

Narrative:

We were cleared for the ILS approach to dfw runway 35C outside of dayzz to intercept the GS at 5000 ft MSL, which we did. While IFR with both the localizer and GS centered and descending, passing through 4600 ft MSL, we received a TCASII resolution alert to climb, with traffic shown very slightly to our right and only 500 ft below us with the vertical separation decreasing. We immediately followed the resolution and climbed back to 5000 ft MSL and notified the approach controller we were going around due to the TCASII RA. I am particularly concerned about this incident because the controller literally scoffed at our need to follow the TCASII resolution alert, even though we were IFR and did not have the traffic in sight. He stated if that's what we were going to do (follow TCASII RA's on final) that we would never get to land because these happen all the time while landing IFR traffic on parallel runways 35C and 35R. I have been based at dfw since 1983, including the entire time our aircraft have been equipped with TCASII. I have never had a TCASII RA on ILS final approach prior to this.

Original NASA ASRS Text

Title: B777 CAPT EXPERIENCED TCASII RA ON FINAL AT DFW WITH ACFT ON PARALLEL RWY.

Narrative: WE WERE CLRED FOR THE ILS APCH TO DFW RWY 35C OUTSIDE OF DAYZZ TO INTERCEPT THE GS AT 5000 FT MSL, WHICH WE DID. WHILE IFR WITH BOTH THE LOC AND GS CTRED AND DSNDING, PASSING THROUGH 4600 FT MSL, WE RECEIVED A TCASII RESOLUTION ALERT TO CLB, WITH TFC SHOWN VERY SLIGHTLY TO OUR R AND ONLY 500 FT BELOW US WITH THE VERT SEPARATION DECREASING. WE IMMEDIATELY FOLLOWED THE RESOLUTION AND CLBED BACK TO 5000 FT MSL AND NOTIFIED THE APCH CTLR WE WERE GOING AROUND DUE TO THE TCASII RA. I AM PARTICULARLY CONCERNED ABOUT THIS INCIDENT BECAUSE THE CTLR LITERALLY SCOFFED AT OUR NEED TO FOLLOW THE TCASII RESOLUTION ALERT, EVEN THOUGH WE WERE IFR AND DID NOT HAVE THE TFC IN SIGHT. HE STATED IF THAT'S WHAT WE WERE GOING TO DO (FOLLOW TCASII RA'S ON FINAL) THAT WE WOULD NEVER GET TO LAND BECAUSE THESE HAPPEN ALL THE TIME WHILE LNDG IFR TFC ON PARALLEL RWYS 35C AND 35R. I HAVE BEEN BASED AT DFW SINCE 1983, INCLUDING THE ENTIRE TIME OUR ACFT HAVE BEEN EQUIPPED WITH TCASII. I HAVE NEVER HAD A TCASII RA ON ILS FINAL APCH PRIOR TO THIS.

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.