Narrative:

On a 1 mi final, air carrier X started to go around stating he had a TCASII warning and started his climb. As air carrier X was climbing the local controller stopped the aircraft at 2500 ft as he was in conflict with small aircraft Y overflying the airport at 3000. I had the captain call the cabin attendant, and he advised the TCASII alert was on an small aircraft on base leg for the north runway -- air carrier X was on final for the south runway!!! He also advised that he did have an alert on the overflt as the local controller was giving traffic! This was close!! Real close!! If the local controller had not stopped air carrier X's climb when he did, there is not doubt in my mind that they would have hit.

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Original NASA ASRS Text

Title: ACR X ON 1 MI FINAL APCH RECEIVED TCASII RA CLB ON SMA TO MULTIPLE RWY OP PARALLEL RWYS EXECUTED GAR HAD LTSS FROM SMA Y OVERFLT IN TCA.

Narrative: ON A 1 MI FINAL, ACR X STARTED TO GAR STATING HE HAD A TCASII WARNING AND STARTED HIS CLB. AS ACR X WAS CLBING THE LCL CTLR STOPPED THE ACFT AT 2500 FT AS HE WAS IN CONFLICT WITH SMA Y OVERFLYING THE ARPT AT 3000. I HAD THE CAPT CALL THE CAB, AND HE ADVISED THE TCASII ALERT WAS ON AN SMA ON BASE LEG FOR THE N RWY -- ACR X WAS ON FINAL FOR THE S RWY!!! HE ALSO ADVISED THAT HE DID HAVE AN ALERT ON THE OVERFLT AS THE LCL CTLR WAS GIVING TFC! THIS WAS CLOSE!! REAL CLOSE!! IF THE LCL CTLR HAD NOT STOPPED ACR X'S CLB WHEN HE DID, THERE IS NOT DOUBT IN MY MIND THAT THEY WOULD HAVE HIT.

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.