Narrative:

Cleared for simultaneous visual approachs to our respective runways. We acknowledged seeing air carrier B. We don't recall if he acknowledged seeing us. About 5 mi on final, approximately 2000 MSL, we received a 'descend, crossing, descend.' RA caused by air carrier B at our 2 O'clock, indicating about 200 ft below us and climbing. We knew he was the cause of the RA (we were expecting it to happen) and safely completed our approach. Air carrier B went around because he said he had a 'climb' RA for an unknown aircraft 200 ft below him. When he made that statement we were, in fact, 200 ft below his altitude because he was going around, but the RA started with us 200 ft above his altitude. I was impressed with how TCASII coordinated our 'descend, crossing, descend' with his 'climb.' the scenario was well orchestrated by ATC with good TA's. I saw no compromises to safety. I believe air carrier B could have prevented his go around if he had kept track of us on his scope as we progressed from proximity through TA and RA. Having lost track/awareness of our position, though, his response was appropriate. I think we, as pilots, need more guidance on TCASII use during simultaneous visual approachs, such as TA only, ignore the anticipated RA, etc.

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Original NASA ASRS Text

Title: 2 ACFT FLYING VISUAL APCHS TO PARALLEL RWYS RECEIVE TCASII RA'S. ONE COMPLIES WITH TCASII AND THE OTHER CONTINUES HIS APCH.

Narrative: CLRED FOR SIMULTANEOUS VISUAL APCHS TO OUR RESPECTIVE RWYS. WE ACKNOWLEDGED SEEING ACR B. WE DON'T RECALL IF HE ACKNOWLEDGED SEEING US. ABOUT 5 MI ON FINAL, APPROX 2000 MSL, WE RECEIVED A 'DSND, XING, DSND.' RA CAUSED BY ACR B AT OUR 2 O'CLOCK, INDICATING ABOUT 200 FT BELOW US AND CLBING. WE KNEW HE WAS THE CAUSE OF THE RA (WE WERE EXPECTING IT TO HAPPEN) AND SAFELY COMPLETED OUR APCH. ACR B WENT AROUND BECAUSE HE SAID HE HAD A 'CLB' RA FOR AN UNKNOWN ACFT 200 FT BELOW HIM. WHEN HE MADE THAT STATEMENT WE WERE, IN FACT, 200 FT BELOW HIS ALT BECAUSE HE WAS GOING AROUND, BUT THE RA STARTED WITH US 200 FT ABOVE HIS ALT. I WAS IMPRESSED WITH HOW TCASII COORDINATED OUR 'DSND, XING, DSND' WITH HIS 'CLB.' THE SCENARIO WAS WELL ORCHESTRATED BY ATC WITH GOOD TA'S. I SAW NO COMPROMISES TO SAFETY. I BELIEVE ACR B COULD HAVE PREVENTED HIS GAR IF HE HAD KEPT TRACK OF US ON HIS SCOPE AS WE PROGRESSED FROM PROX THROUGH TA AND RA. HAVING LOST TRACK/AWARENESS OF OUR POS, THOUGH, HIS RESPONSE WAS APPROPRIATE. I THINK WE, AS PLTS, NEED MORE GUIDANCE ON TCASII USE DURING SIMULTANEOUS VISUAL APCHS, SUCH AS TA ONLY, IGNORE THE ANTICIPATED RA, ETC.

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.