Narrative:

ATC facility: dfw approach. Location: 22 DME west of buj. On buj arrival, TCASII gave us a command to monitor vertical speed with a resultant command to climb at 1500 FPM. A departing super 80 was our conflicting traffic. TCASII indicated the traffic was 400 ft below us and stayed at this 400 ft separation for most of our climb until reaching 12500 ft. After clear of traffic, we returned to our original altitude of 11000 ft. ATC was advised of our deviation, and I do not recall any issuance of a TA from ATC. In retrospect, I am curious why the traffic continued to climb with us during our TCASII climb. Did they have no TCASII, did it fail?

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Original NASA ASRS Text

Title: B727 FLC HAS TCASII RA DURING ARR AND CLBS 1500 FT WITH CONFLICTING TFC STAYING AT 400 FT BELOW DURING THE CLB.

Narrative: ATC FACILITY: DFW APCH. LOCATION: 22 DME W OF BUJ. ON BUJ ARR, TCASII GAVE US A COMMAND TO MONITOR VERT SPD WITH A RESULTANT COMMAND TO CLB AT 1500 FPM. A DEPARTING SUPER 80 WAS OUR CONFLICTING TFC. TCASII INDICATED THE TFC WAS 400 FT BELOW US AND STAYED AT THIS 400 FT SEPARATION FOR MOST OF OUR CLB UNTIL REACHING 12500 FT. AFTER CLR OF TFC, WE RETURNED TO OUR ORIGINAL ALT OF 11000 FT. ATC WAS ADVISED OF OUR DEV, AND I DO NOT RECALL ANY ISSUANCE OF A TA FROM ATC. IN RETROSPECT, I AM CURIOUS WHY THE TFC CONTINUED TO CLB WITH US DURING OUR TCASII CLB. DID THEY HAVE NO TCASII, DID IT FAIL?

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.