Narrative:

We were on approach control (126.9) being vectored to a right downwind to 26R at 11000 ft. The TCASII system activated with an RA and we climbed to about 11500. About 5-10 seconds after the RA alert the controller called out the traffic below and to the right. I believe it was an large transport climbing rapidly. We told him about our climb to 11500 and that we were correcting back to 11000. He acknowledged.

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Original NASA ASRS Text

Title: ALTDEV TCASII RA.

Narrative: WE WERE ON APCH CTL (126.9) BEING VECTORED TO A R DOWNWIND TO 26R AT 11000 FT. THE TCASII SYS ACTIVATED WITH AN RA AND WE CLBED TO ABOUT 11500. ABOUT 5-10 SECONDS AFTER THE RA ALERT THE CTLR CALLED OUT THE TFC BELOW AND TO THE R. I BELIEVE IT WAS AN LGT CLBING RAPIDLY. WE TOLD HIM ABOUT OUR CLB TO 11500 AND THAT WE WERE CORRECTING BACK TO 11000. HE ACKNOWLEDGED.

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.